| Join Enchanted Learning Site subscriptions last 12 months. Click here for more information on site membership. As low as $20.00/year (directly by Credit Card) |
||||
| Site members have access to the entire website with print-friendly pages and no ads. | ||||
| CoolDino.com: Dinosaur Forums |
| VOTE FOR YOUR FAVORITE DINOSAUR | DINO TALK: A Dinosaur Forum |
DINO SCIENCE FORUM | DINO PICTURES/FICTION: Post Your Dinosaur Pictures or Stories |
The Test of Time A Novel by I. MacPenn |
| ZoomDinosaurs.com Dino Science Forum: Scientific Discussion of Dinosaurs - Jan. 2001 This forum is for the scientific discussion of dinosaurs and other related paleontological topics. Click here to add to the message board. Sorry, but the FTC (Federal Trade Commission) does not allow us to list your e-mail addresses. |
All thanks to somebody called
"Madhatter", really, he's probally somewhere else dissing
people off. That person really has a social relation problem,
he must be number one, or he'll kill (or belittle you) to do
so.
from Honkie Tong,
age 16,
?,
?,
?;
January 26, 2001
I must say, this page is a little
underused.
from Josh,
age ?,
?,
?,
?;
January 26, 2001
Can anybody tell me what we are
talking about?
from J.S.,
age ?,
?,
?,
?;
January 21, 2001
Rodolfo Coria, another expert
that has me all boggled.
Well, I was looking up a few old articles in a magazine when
I read a statement by this guy that has me all boggled. He
says that the eyes of Giganotosaurus were "looking at you
like an eagle" while that of T.Rex was on the side. Erm, why
hasn't anybody corrected him yet? It's supposed to be the
other way round.
from Josh,
age ?,
?,
?,
?;
January 17, 2001
Hmm, are you refering to the
"imperator" sized specimens? Well, unfortunately, it is going
to take some time before the critter is out of the matrix,
not to mention some idiots, not experts dug it up with a
backhoe.
Also, I am not sure it's a good idea to name it a totally new
animal based on its size, as of yet, there has been nothing
to suggest that Rigby's tyrannosaur is more than a normal, if
somewhat large T.Rex.
I heard news about Rigby's rex having bigger forelimbs, but
that has been dismissed.
Also, there is at yet no evidence put forth to suggest this
is anything
(I warned people this would happen, didn't
I...)
other than Tyrannosaurus rex. Please refrain from spreading
the rumor this
is a new species.
from Josh,
age ?,
?,
?,
?;
January 17, 2001
This just came in, latest estimates of
Tyrannosaurus Rex biting abitlites just rose another notch higher.
Instead of the previous 12,000 newtons in an attack bite, the best
estimates now put it at 15,000 newtons in the bigger specimens.
Thank you.
from Honkie Tong,
age 16,
?,
?,
?;
January 16, 2001
Gee honkietong, just stop trying
to belittle me and tell me where you got your info from. Not
Levine or anyone else, just you. Where did you get
yours?
from MadHatter,
age ?,
?,
?,
?;
January 15, 2001
I'm not saying we should calculate the
intelligence of the dinosaurs to an exact figure, but we can cross
out possibilities to get a rough picture. And so far, it dosen't
point towards them being very smart.
from Jon F,
age ?,
?,
?,
?;
January 15, 2001
Natural selection is not the only
process in evolution, evolution is anything but a ramdom process. If
you ask me, evolution seems controled in the submodular level, but
apparently ramdom in the general sense, I wonder what's the reason
behind it? Hox control genes
? They only affect a segment of your body.
from Honkie Tong,
age 16,
?,
?,
?;
January 15, 2001
I agree, unfortunately, we try to make
too many assumptions from the bones, which are only snapshots in
time.
from Honkie Tong,
age 16,
?,
?,
?;
January 15, 2001
I think I am being misunderstood. I never
said dinosaurs were super intelligent or something, I just said WE
can't ever know for sure. What is intelligence anyways? Nothing can
really measure it properly, for some brains are suited for some things
more than others. Basically I'm saying that 'intelligence' really
means nothing.
from Chandler,
age ?,
?,
?,
?;
January 15, 2001
Natural selection can't be the only aspect
of evolution, it doesn't make sense.
from Chandler,
age ?,
?,
?,
?;
January 15, 2001
Why does brain power increase with time? I
find this puzzling. Mesozoic animals had more developed brains than
Palaeozoic animals, Cenozoic creatures had more developed brains than
Mesozoic animals, etc,etc. Is this natural selection at work? We know
that there are major problems with natural selection. Or is there
something else at work? Something we do not completely understand. If
so, What?
from DW,
age ?,
?,
?,
?;
January 15, 2001
Actually Honkie got me bang on the nail.
I'm saying if you have a dino brain the same size as that of a
compairable mammalian brain, the dino would be less intelligent. If
anything, dinosaurs seem to have "less" efficent brains. I don't
really expect a Stegosaurus with the intelligence of a cow, really,
more likely a turtle or a tortise.
How large does a brain have to be? Although we usually feel that as a
body gets larger the brain must also expand, we really have no
definite basis for that assumption. A brain has a lot of functions,
but many of them involve automatic behavior. An order to breathe or a
signal to release a hormone can be performed by a small number of
nerve cells and yet have a major effect on a distant organ as a large
muscle unit reacts or a distant gland releases large supply of an
active substance. An order for a leg to walk can require the same
number of brain cells in a large animal as in a small one, it's just
that larger muscles are following the orders. Delicacy of movement
and fine motor coordination certainly benefit from more neurons, but
when the beast being controlled weighs forty tons or more, does
delicacy really matter? At that size, an animal makes its own path
rather than worrying about staying on a trail. Many functions, such
as finding food and mates can be hard-wired into fairly small units of nerve tissue and still leave some room
for variability in their expression. Tiny lizards and fish, and even
insects, can show relatively complex behavior with brains the size of
a pinhead. Great intellectual function was almost certainly lacking
in Dinosaurs as it is in practically every creature known, but that is
not really a disadvantage for survival in most cases. But the bottom
line is, the Dinosaurs were quite intelligent for their size, but not
as intelligent as you make them out to be.
from Jon F,
age ?,
?,
?,
?;
January 14, 2001
I don't see the fuss being put into the
conversation of animal species. I mean, extinction dealt by another
better, more advanced design is common throughout history, why should
we do any different? In fact, it seems when we conserve certain
species, we are harming others. We are literally slowing down natural
selection, and doing what we see fit instead of allowing "natural"
laws to work. Kill all the animals! Only those that survive deserve to
survive. Greenpeace? Bah! If they knew what was good and natural for
the earth, they would allow us to exploit and damage
it.
from ?,
age ?,
?,
?,
?;
January 14, 2001
It dosen't really matter if the birds were
direct decendents of the dinosaurs. If you ask me, they're probally
very similar, so similar that even if they are not cadustically
linked, we can call them the "new dinosaurs."
from Honkie Tong,
age 16,
?,
?,
?;
January 14, 2001
That picture at
http://dinosauricon.com/images/tyrannosaurus_chase-jc2.html, is a
great insult to a great predator. It looked like the artist made a
serioous mistake and decided to cover it up with a turf of four feet
tall graphite fuzz.
from Billy Macdraw,
age 18,
?,
?,
?;
January 14, 2001
I hardly think rexy was "fluffy" Skin
impressions seem to point in the other way. Besides, given rexy's
impressive size causing heat dissapation to be more of a problem than
retention, and the idea that he may be warm blooded, and the idea that
his climate was warmer than ours, I get the impresion that the
paleoartist didn't put too much thought into the whole picture.
Prehaps I tend to agree with Bill's idea, that T.Rex was downy of
feathery when young, but lost it's insulation as it grew
up.
from Honkie Tong,
age 16,
?,
?,
?;
January 14, 2001
Actually, the structure of the brain
affects the intelligence of the animal largely. Simple brains tend to
show lower intelligence than complex brains. What we do see from
dinosaur brains is that they do have relatively uncomplex
neurostructures as when compaired to modern birds and mammals. My
guess is, most of their behaviour was wired in and instinctive and in
short, they didn't think that much.
from Honkie Tong,
age 16,
?,
?,
?;
January 14, 2001
Hmm... I was thinking if some of the
dinosaurs were warm blooded, and if they were above a certain size,
they didn't really need the insulation to keep them alive on a cold
night.
from Jon F,
age ?,
?,
?,
?;
January 14, 2001
Jon, you are saying that if dinosaurs were
'feathered' then they would have feathers similar to birds'? That
wouldn't be correct; in fact most impressions show otherwise, even to
dinosaurs very close to birds in lineage. Their feathers were similar
to fur, and used only for insulation. Most people think 'feathered'
means like present day flying birds. Just look at flightless birds,
their feathers are returning into a more fur-like state than feathers
that are used for flight and insulation: they don't need the complex
flight feathers anymore, and dinosaurs had even more fur-like
feathers.
from Chandler,
age ?,
?,
?,
?;
January 14, 2001
Honkie, where are you getting your
information that "most soft tissue fossils show that dinosaurs tended
to be unfeathered"? Actually, almost all of the small dinosaurian
soft tissue samples show that they did have some sort of feathers (it
was actually more like finely branched, very soft fuzz). Basically,
if any small dinosaurs are known to have soft tissue impressions, they
usually had feathery integument (fur/feathers). _Pelecanimimus_ is
the only exception that comes to mind, but it doesn't mean much since
only the throat region of skin impressions were discovered and the
rest of its body likely was covered in "dino-fuzz."
from Chandler,
age ?,
?,
?,
?;
January 14, 2001
Reuben, _Protoavis_ is not a bird or
proto-bird or anything closely related to birds. Paul (I think) says
that it is a chimaera (mix of remains) between some sort of pterosaur
and a herrerasaurian. Given, even in the Triassic herrerasaurians
were quite bird-like, but still, not in the immediate vicinity of bird
ancestry. I think it was Chatterjee that used _Protoavis_ as an
argument that dinosaurs were not evolutionary precursors to birds, but
he was wrong I guess, and made too many assumptions.
from Chandler,
age ?,
?,
?,
?;
January 14, 2001
Jon, you can't use EQ to determine
intelligence, really. Even if you did dinosaurs would be smarter than
reptiles anyways, most had EQs the same as large ground birds like
emus and ostriches. But EQ is just silly, it doesn't work. If that
was the one determining factor for intelligence, then squirrels and
elephant-nosed fish would be smarter than people (they have higher
EQs).
from Chandler,
age ?,
?,
?,
?;
January 14, 2001
Dinosaurs with Feathers-
Basal Deinonychosauria (Archaeopteryx,Microraptor,
Sinornithosaurus)
We don't see many highly derived animals here. It's possible that
Deinonychus was secondarily featherless (it was secondarily
flightless, if Archaeopteryx was its ancestor), but there are no
non-feathered skin fossils for any of these groups. Are you referring
to Scipionyx when you say "fossils showing soft tissue seem to suggest
that dinosaurs tend towards being unfeathered"? Well, that one is a
problem.
There are no ornithomimosaur, troodontid, or tyrannosaur (the
Arctometatarsalia to some, an artificial group to others) feathers--
so feathering these groups is currently just speculation. Just for
fun, here's a link to a very fluffy rex (or is that grass?):
http://dinosauricon.com/images/tyrannosaurus_chase-jc2.html
Basal Maniraptora (Protachaeopteryx)
Basal Ornithoraptosauria (Caudipteryx)
Basal Therizinosauria (Beipiaosaurus)
Compsognathidae (Sinosauropteryx)
from Brad,
age 14,
Woodville,
ON,
Canada;
January 14, 2001
Say Chandeler, I have been doing some
study into non-avain dinosaurian neurology and I'm afraid that I have
concluded that Stegosaurus was probally not as smart as a cow. Or at
the very least, the dinosaurs did not have small brains beause os
balance. Besides, adding a kilo to the brain is a big difference, why
not do that? It won't cause you to tip over. But whatever it is, the
dinosaurs were probally as smart as the reptiles today.
from Jon F,
age ?,
?,
?,
?;
January 14, 2001
Downy Dinosaurs?? They may have been
fairly closely related to birds and a lot of experts now say they were
birds. Even if that is true, by the mid-Jurassic they were probably
50,000,000 years apart. That's enough time to develop some pretty
prominent differences in covering. Some feather-like structures have
been found on some small theropods, but a lot of them are more fibrous
than feathery and actually subcutaneous in location. So, were
Dinosaurs totally covered with feathers? There is no real evidence in
the fossil record for this, so why the rush to feather covered
pictures and sculptures in the name of scientific accuracy? Birds
need aerodynamic feathers for flight and fluffy feathers for heat
retention. Dinosaurs were too big to fly and at their size heat
dissipation would have been a greater concern. Looking at recent
sculptures and paintings I have seen raptors with punk crests and a
lot of Dromaeosaurs with fully feathered "wings
"; for what purpose? It takes a lot of energy to make feathers.
These animals were not structurally adapted for flight, so why waste
hard-to-get protein on frivolous plumage? I see others covered with
the hairy feathers typical of modern ratites. If they had to have
feathers, I suppose that is how they would have looked, being ground
dwellers. They didn't have featherless bird beaks, but all the
feathered depictions I have seen look like bald-faced vultures. Why
doesn't the face ever get feathered? Why is it that most of these
look as if they were conceived by Dr. Suess?
from Jon F,
age ?,
?,
?,
?;
January 14, 2001
I'm not sure if we should make a big fuss
of it, the line between birds and dinosaurs is a blurred one.
Archaeopteryx may have been a dinosaurian dromie, or it may have been
a bird with dromie charaterstics.
I wouldn't put feathers to coelurosaurs as quickly as you do Brad, I
prefer to wait for solid evidence first. My feeling is, feathers might
not have mattered a lot to the coelurosaurs. Besides, fossils showing
soft tissue seem to suggest that dinosaurs tend towards being
unfeathered.
from Honkie Tong,
age 16,
?,
?,
?;
January 14, 2001
I'm not sure that birds were around before
dinosaurs, Reuben. Your first point was that Archaeopteryx is older
than the most bird-like dinosaurs. This stems from a century and a
half of calling Archaeopteryx the first bird. Archaeopteryx is
essentially a small dromaeosaur- here's a link to the article:
http://www.dinosauria.com/jdp/archie/dromey.htm
Dromaeosaurs and Aves may both have their origin near Archaeoptryx,
the more familiar dromaeosaurs being secornadrily flightless. All
coelurosaurs in the Jurassic were probably feathery. As for
Protoavis, I don't know what it is, but its a bit younger than the
first dinosaurs (its about as old as Coelophysis, I
think).
from Brad,
age 14,
Woodville,
ON,
Canada;
January 13, 2001
JC, you do have a point. But at least real
science is better than some debates in the history of dino talk (and
defanatly the "my dinosaur is better than your's" debate). Some of
them might have seen the original idea was "dinosaur debate". For the
kids, I've discovered that birds are older than dinosaurs! All the
dinosaurs Archiopterix probaly evolved from apeared after it did. So
it probaly evolved from some protoavian form. Then maby Protoavis was
a bird. So where did it come from? Most likely the ancestoral reptile.
So birds would be older than dinosaurs. The explanation of the
dinosaurs it probaly evolved from is they are not dinpsaurs but
birds.
from Reuben B.,
age 7,
Needham,
MA,
USA;
January 13, 2001
I really wasn't saying that it was a T.
rex v raptors debate, I was saying its really dumb and pointless to
check this board every time I come online to find it riddled with the
same exact arguments by whoever and whoever else over and over and
over. I agree with JC that if it doesn't improve the section should
be cancelled, there's no point anymore if there isn't any new
discussion! Move on, people!
from Chandler,
age ?,
?,
?,
?;
January 12, 2001
MadHatter, I must start out with an
apology, a piece of information I posted about a topic you brought up
is wrong. I regret this wrong piece of information I gave you...
You said:
And I answered:
"Oh, that's what you mean. Yes, there's no way to really prove it yet.
So any theory on the septic bite remains as speculation, and I accept
it as such. But recently, Larson is studying some Edmontosaurus
headled Tyrannosaur bites and has said he has noticed some bone
deformation, which may indicate a massive infection resulting from the
bite. This is good, but this is still equivocal evidence. I'll look
for better ones."
It turns out I was dead wrong...THERE IS ACTUALLY CONCLUSIVE EVIDENCE
FOR T.REX HAVING A SEPTIC BITE! IT'S NOT SPECULATION! HAHAHAHHA!
I just found this...
Many attempts have been made to answer the question of whether
tyrannosaurs were active predators -- seeking out and killing their
prey or were scavengers, waiting for the opportune moment to step in
and satisfy their hunger. Joining this debate, researcher William
Abler and his colleagues have literally looked inside this amazing
dinosaur's mouth for clues and come up with some surprising results.
The enormous teeth of the tyrannosaur would seem like the perfect
killing tool with sharp points and serrations on both the front and
back edges. But when put to an actual test of bone crushing and flesh
tearing, would they live up to this perfect image?
Abler and his associates wondered about the serrations seen on the
teeth, and whether they would serve the same purpose as those on
common kitchen knives. Since no studies had been done regarding knife
edges, Abler set up an experiment with serrated blades and tyrannosaur
tooth edges.
By creating a series of standardized knife edges, including a serrated
edge, the scientists were able to study cuts or tears on actual pieces
of meat and simulate biting experiences similar to those that might
have been demonstrated by the dinosaur.
The blades were "mounted on a butcher's saw operated by cords and
pulleys" that created a sawing action on several same-sized pieces of
meat. While the straight edge split the meat, a serrated knife edge
"gripped and ripped" it.
A serrated fossil tooth of the ancient shark Carcharodon megalodon
produced similar results. When a tyrannosaur tooth was placed in the
mechanism, it produced cuts similar to those made by a smooth knife
blade that was in need of sharpening. Questioning these results, Abler
wondered: if the menacing tooth edges were not sharp, what were they
for?
When comparing the serrations of the tyrannosaur tooth with those of
the ancient shark, Abler saw major differences in the shape of the
points and in the spaces between the points, or cella. The shark's
tooth had pyramidal-shaped points. while those of tyrannosaurs were
cube-like.
Putting the teeth of Albertosaurus to the meat test, the scientists
discovered food particles and grease trapped in the cella. According
to Abler, when such particles remain in the mouth they become the
sites for septic bacteria which can result in fatal bites to
victims.
A "puncture and pull" method of biting seemed most apparent to Abler,
where the dinosaur's teeth acted as pegs that more or less held the
victim. Also, due to the non-articulating surface of the teeth, he
hypothesized that tyrannosaurs did not chew their food but swallowed
it whole.
Abler cites a study of the Indonesian Komodo dragon (Varanus
komodoensis), whose teeth are similar in shape to those of
tyrannosaurs. Ciofi's study has led the paleontologist James O. Farlow
to suggest a positive comparison between the two animals. Since the
Komodo dragon sometimes hunts by biting its prey and then waiting for
it to die through an infection of the wound, why wouldn't this be
possible in tyrannosaurs?
[People bitten by a Komodo dragon more frequently die from sepsis than
from the damage inflicted by the wound itself. -- Ed]
Abler adds that with tightly closed lips, tyrannosaur teeth may have
pierced their own gums, which would then have bled and nourished the
septic dental bacteria. This would have provided perfect conditions
for poisoning future prey.
It looks like I was wrong when I said that the theory was based on
speculation, there are studies and conclusive real-time evidence
coming out too. But wait a minute, didn't you say at first...
"May I also add, the whole theory about T.Rex and his "nasty bite" is
all in speculation too, so you cant rear that one up about how deadly
T.rex is anymore. "
Woops, did I just prove you wrong? I didn't mean it, honest! But
wouldn't it mean you were WRONGER than me for suggesting it's ALL in
speculation and that we can rear it up? Hmm ...... ...................
............ .................... ...............................
.................. ................... ..............................
................
"May I also add, the whole theory about T.Rex and his "nasty bite" is
all in speculation too, so you cant rear that one up about how deadly
T.rex is anymore. "
"Haha. Honkie, when you dont wanna answer something, boy do you change
the subject, Im talking about the speculative "yuck mouth", or septic
bite if you will. notice the words "nasty"."
This indicated that tyrannosaurs might have been able to merely bite
their victims and sit back and wait for them to succumb to the fatal
infection.
from Honkie Tong,
age 16,
?,
?,
?;
January 12, 2001
Open your eyes and see! Let me qoute some
biologists I mentioned.
Tale offical statement:
"The interpretive conclusions presented in these Technical Reports are
based only on the results of these popular paleontological
rationalization. Extrapolation of these results to other species and
quantitative risk analyses for dromaeosaurids behaviour require wider
analyses beyond the purview of these studies. As of now, a quantity of
popular speculations about dromaeosaurid behaviour remainly wrongly
accepted as fact." (He was refering to somebody who answered the
raptors MUST have taken on big prey)
Matt Wedel says this:
"Indisputable evidence does not exist for big prey or pack hunting in
dromaeosaurids. It is highly unlikely that the dromaeosaurids commonly
took on large animals. Morphological and postural evidence, bone
histology, ecological information, and brain/body size relationships
indicate that we cannot make sweeping generalizations about
dromaeosaurid behaviour. Most likely it varied between groups, but big
animals were probally a rare, if energy-abundant source of food in a
dromaeosaurid's diet."
Frank Galef says this:
"To be honest, I like the way the way most paleontologists today
envision the past. Most of the popular ideas of raptors showcase a
set of banana sized slicers and dicers which they "MUST" have used on
big prey. I am just calling for caution in trying to keep up with the
latest speculation in the field. In another fifty years we may look
back on this era of raptordom with the same bemused countenance we now
apply to the creatures of Hawkins' Crystal Palace."
He also goes on to say:
"Based the conclusions I draw from the raptors via the application of
my knowledge of biology and zoology, I start to wonder if the experts
who stated that the raptors were "obviously" big prey killers have
really put much research into the raptors at all. I'm not sure
whether they are saying this because it makes their favorite Dinosaurs
look fiercer or if they really have any scientific basis for their
claims. It's unlikely that a lot of fossilized trace fossils will
ever be found to prove this contention one way or the other, but I
don't think it makes a lot of sense from an evolutionary standpoint or
even from the fossil evidence that does exist."
I like this one. I've been looking around in my older sister's
textbooks and found what that seems to be in direct attack towards the
expert MadHatter quoted:
" As for the prey size in relation to the predator, this probally
vaired with the different species of predator. However, a limit to
this variation can be observed."
Thomas R. Holtz, Jr, a paleontologist:
"forget ever reference you've seen to Velociraptor and Deinonychus as
being "swift" or "deadily" as dinosaurs go. Even Tyrannosaurus rex has
proportionately longer lower legs and feet than do these smaller
forms"
I also like this one:
"Most large theropods (allosauroids, megalosauroids, Dryptosaurus,
etc.), match some variation on the grapple-and-bite theme. The hand
claws of these animals closely match the proportions and angles of
predatory birds, and are at the end of short but powerful arms. Like
predatory birds, these claws were probably not the primary weapons of
killing, but were used to seize and hold the prey while the jaws did
the work. Note that it is these animals, and NOT dromaeosaurids, which
match modern "raptors" the best."
Forster, C, paleontologist:
"Based on careful scientific study, I feel that any assumptions that
the dromaeosaurids hunted in packs is premature and shaky. It's
unikely for dromaeosaurids to attack big animals, maybe it's time to
look at alternative arguments?"
MadHatter (edited, just had to do it:-):
"you scientists assuming big prey hunting are not real scientists and
all you wanna do is fight because your shallow and a snively, nerdy
little worm without a life. Get outta here. Ive seen what youve said,
about the raptor fan withwhoever and in science, there is not a place
for people who lie, falsify and tell what is popular just cause its
the popular vote. Most of what you say is your opinion and thats ALL
it is. HAhaha."
Duncan Watt:
"The latest estimates now put Tyrannosaurids on same level with the
intelligence of predatory birds like the eagles or falcons while the
Dromaeosaurids have been put at the same level as that of mean
poultry. But one should know that while all this seems contray to what
we have know about, one must know that methods of determining
intelligence remained simplistic and inaccucrate for a long time until
now. "
>From the WWD Bloopers:
"Like in Jurassic Park, Walking With Dinosaurs envisioned a bunch of
mean lean Utahraptors. But does this make sense? Having Utahraptors
taking on Iguanadon is a exciting idea, but seriously, no animals,
save for humans and social insects would have put their lives in
extreme peril to seucre a meal. The makers of WWD put this down as a
"speculative portrayal of raptor life" and that's what the big prey
theory is, speculation."
A few other small quotes from the experts:
" I think a lot of our ideas on the raptors are ludicrous"
" For the dromaeosaurids to take down animals many times their size,
they will have to defy logic."
" I for one think we have made too many assumptions about the
raptors."
" Hunting in packs and bringing down large animals is an exciting
idea, but it's a weak one. I have thought up of amny other more likely
seneriaos to paint..."
" It's sad that once a myth is planted, it's hard to up uproot."
" Assumption is not fact."
" A sore loser tries to play and put down the winner, a gentleman
keeps his silence."
" If you don't admit your mistakes, you'll never learn."
" Woe to those who don't know the past, for they are condemmed to
repeat it."
" As of yet, there is no good evidence to suggest complex carnivory
behaviour in the dromaeosaurids."
" Having the "raptors" to pack hunt is absurd from basic principles of
evolutionary biology. The only animals which attack much larger prey
like ants regardless of losses sustained are eusocial insects like
ants. They do it because the colony, not the sterile worker
individual, is the passer on of genes and the unit on which natural
selection acts. If the colony loses 0.2 grams of worker to get 20
grams of prey it may make a net gain in colony fitness justifying that
(and ants, such as army ants, that do regularly swarm over much larger
prey tend to have queens that produce vast numbers of eggs to replace
squashed workers quickly!) But a non-social vertebrate that regularly
gets itself killed so that even related individuals will get more food
will kill off the genes for such suicidal altruism with itself. Only
if the rest of the pack are very closely related would such behaviour
occur. That would only happen if coelurosaurs, like naked mole-rats,
were as eusocial as ants, com!
plete with queen and sterile workers. Mole rats evolved this because
of their very odd lifestyle (in fact evolutionary biologists predicted
the naked mole-rat's social structure form its life-style before
either was discovered in the field!). Coelurosaurs almost certainly
were not eusocial and therefore could not in principle have evolved
the behaviour many excited experts depicts.Our visions of superkiller
raptors are as ridiculous as depicting flocks of homicidal hens
rampaging the modern Bucks countryside, swarming over hapless sheep
and pecking them to death!" (An expert calling himself by the net
name of "Magpie")
from Billy Macdraw,
age 18,
?,
?,
?;
January 12, 2001
Darn, I kinda hope at least my last few
posts got through, I have to defend myself you know. But what the
heck.
from Honkie Tong,
age 16,
?,
?,
?;
January 11, 2001
Chandeler, this is not a T.Rex vs raptor
debate, we're simply trying to prove the raptors were not as deadily
as before.
from Honkie Tong,
age 16,
?,
?,
?;
January 11, 2001
Hi guys, I'm back! What's going on here?
If you want to fight, you can take it to Dino Talk, not Dino Science.
We talk science here, not how pathetic or goofy somebody is here. Come
on guys, you're in violation of good scientific behaviour here.... Can we get back to
the science?
One more thing, science is about discovery, not quoting experts,
doctors or paleontologists, stop using them as a weapon to degrade
your opponent's points.
from Joseph,
age ?,
?,
?,
?;
January 11, 2001
Hmm, I donno Brad. My father, a Zoologist
tells me that the science of wounding required more than bite force,
it also requires an admirable array of oral hardware followed up by
the locomotive systems that is supposed to deliver all this to the
target. But taking your human question into question, I think that's a
as you said, silly acessment of human abilities. Given our lously
incisors and the fact that we, attacking as a pack would be spreading
the damage all over his body, would stand hardly a chance of bringing
him down in short order, let alone penetrate his hide. Not to mention
T.Rex could run three times faster than the adverage human. Not that I
say we can chase him away, but he'll make short work of
us.
from Josh,
age 12,
?,
?,
?;
January 10, 2001
Well, I don't think you should lamblast
Josh for that. He does have a point you know. As for Honkie...well,
he's your opponent right?
Anyway, since there has been some confusion over what "evidence"
means, I'll classifiy them into three main groups. There are also many
other forms of evidence, but the misidentification of these three are
mainly responsible for most of our dinosaur misconceptions.
1. Equivocal evidence
Well, most of the evidence in paleontology comes in this form, mainly
because we try to deduce behaviour from them. Equivocal evidence can
help give you vauge headings on how to form your hypotheses, but never
supports it nor rejects it. An example is trying to use unhealed bite
marks on fossils to determine if the animal who made these marks was a
predator or a scavenger. Sadly, some hypotheses drawn from equivocal
evidence is treated as fact, which is not the way its supposed to be
done.
2. Good Evidence
Good evidence helps to point you in one direction, or helps build up
your case, but is not good enough to conclude your case by. An example
is by finding a skull of an animal with extremely sharp, serrated
teeth. Now, that animal could BE a herbivore, but good evidence points
strongly towards it being a carnivore.
3. Conclusive evidence
Truly rare if you don't know where to look. Conclusive evidence can
make, or break your case. The entire fate of certain theories can
simply rest on one piece of conclusive evidence. For example, we are
now conclusively sure T.Rex was at least predator for we have found
evidence of healed over attacks on herbivores indicating failed
attacks. Coupled with finds of acid-etched herbivore bones in the
T.Rex fossils, all this is conclusive evidence that T.Rex was at the
very least, a predator.
Now MadHatter, from a non-moral, scientific point of view, your
opponents seem to be aware of the trap of overquoting equivocal
evidence and have decided to use good and conclusive evidence to blast
you instead. Though I wince at their ruthlessness, I am impressed by
their handeling of the slippery tool in paleontology we call evidence.
In a court of law, their case would be ruled a better one, just to
tell you. Instead of screaming at them, which I doubt will work as
they're used to it from months of Mr.Rogers and BBD, try fighting fire
with fire. I'll help tell you if that piece of evidence you presented
was equivocal, good or conclusive. Nobody is going to take pity on
you, even though you are being pack-hunted if you have a weak case.
Quick, do it!
from Levine,
age 25,
?,
?,
?;
January 10, 2001
You astound me with your calculations. Are
you joking?
from Honkie Tong,
age 16,
?,
?,
?;
January 10, 2001
Oh, that's what you mean. Yes, there's no
way to really prove it yet. So any theory on the septic bite remains
as speculation, and I accept it as such. But recently, Larson is
studying some Edmontosaurus headled Tyrannosaur bites and has said he
has noticed some bone deformation, which may indicate a massive
infection resulting from the bite. This is good, but this is still
equivocal evidence. I'll look for better ones.
But anyway, with 12,000 newtons os bite, T.Rex still would have the
nastiest bite in the animal kingdom.
from Honkie Tong,
age 16,
?,
?,
?;
January 10, 2001
To tell the truth, its more of trying to
insult than dispatch. I ask a question, and all this blows up in
aggression and bitterness. The thing is, people who spend almost all
their time on the computer or up in rooms cuz they dont or cant do
anything else tend to want to pick on or fight over the computer.
Notice the pettiness, chandler, like of Josh. Trying to quote a whole
dictionary to me. I dont think well in a fight, and I dont know every
scientific word, but why should I feel bad that a couple hackers
"dispatch" what I say, Ive always succeeded in science so far and I
still will, maybe I dont have the advantage of being on a computer all
the time, but thats ok. They never answer me when I ask where they
found this information so I can see it for myself and get caught up,
Chandler, I dont even take them that seriously, Levine is a cool
sport, but people like HonkieTOng and Josh, have nothing better than
to sit and try and make others feel stupi!
d on a dinosaur site for curious fans and children. If you ask me, its
pathetic. And I doubt honkietong will ever tell me where he found all
his information...I wish he would stop trying to get me upset, it dont
work and it gets annoying when your trying to relax and someone is
trying to tease, really sad, and the whole "type me aussie accent on
dis ting when me be tokin" please stop it. Its goofy man, just
goofy.
from MadHatter,
age ?,
?,
?,
?;
January 10, 2001
Haha. Honkie, when you dont wanna answer
something, boy do you change the subject, Im talking about the
speculative "yuck mouth", or septic bite if you will. notice the words
"nasty".
from MadHatter,
age ?,
?,
?,
?;
January 10, 2001
If humans can bite with up to 175 pounds,
and tyrannosaurs can bite with up to 3011 pounds, then the bite of the
human is stronger pound per pound. My weight is 1% that of a T. rex,
or about 120 pounds. Let's assume that my biting force is also around
120 pounds. (or perhaps 175 pounds is a really spectacular world
record, and the average person falls much lower than that-- help?) A
pack of one hundred people my size, with no weapons, would have equal
weight but four times the biting power of a T. rex, and therefore
could kill it easily. And you though the raptor-rex battles were
silly. By the way, does anyone know if raptors had powerful
bites?
from Brad,
age 14,
Woodville,
ON,
Canada;
January 10, 2001
Not that I want to kill you, Madhatter off
or anything, but I've noticed that you have stated that the idea
behind T.Rex having a nasty bite is all speculation. Here, to avoid
putting words into your mouth, let me quote you:
"May I also add, the whole theory about T.Rex and his "nasty bite" is
all in speculation too, so you cant rear that one up about how deadly
T.rex is anymore..."
Alright, you should have made that statement about 5 years ago, and it
would be valid, for till then, no really in-dept studies into T.Rex
biting abilities have been made, so any statements about his bite till
then was well, at best, quite speculative.
Of course, speculation can be proven right if it was tested, and I'm
afraid that was what people did in 1996. To prove speculation correct,
as Levine would say, "good old fashioned taphomony can't be beat!" I
agree, well, this's what happned:
One would think that a creature as dentally well endowed as
Tyrannosaurus rex--sporting the largest teeth of any dinosaur--makes a
pretty strong case for being a predator of reckoning, even if it does
have puny forearms. Yet a minority of paleontologists maintained that
T. rex teeth and jaws couldn't stand up to the wear and tear of being
an aggressive predator. The case to the contrary just got literally
and figuratively stronger.
In the first experimental attempt to measure the jaw- clamping
capacity of any dinosaur, a Berkeley biologist and a team of Stanford
biomechanical engineers have determined that T. rex wielded a bite
force exceeding that of any living animal. Its teeth could exert a
crushing force of more than 3,000 pounds. According to biologist and
lead author Gregory Erickson, a former student of Horner's, "This is
like the weight of a pickup truck behind each tooth."
The new evidence comes from a 70-million-year-old fossilized
Triceratops pelvis found five years ago in Montana's fossil-rich Hell
Creek Formation by amateur dinosaur hunter Kenneth Olson. The
four-and-a-half-foot-long bone contains 58 definite bite marks and
another two dozen possible dental impressions from teeth that could
only have belonged to a tyrannosaur. Many of the marks display
distinctive furrows as though the biter had struggled to deflesh its
prey. Repeated biting removed a sizable chunk from the front of the
largest pelvic bone.
For his study that appeared in the August 22 issue of Nature,
Erickson, a graduate student in the Department of Integrative Biology
at the University of California at Berkeley, collaborated with
Stanford University engineer Dennis Carter, an expert on the mechanics
of bone, graduate students Samuel Van Kirk and Jinntung Su, and two
other Stanford colleagues to calculate how much force the T. rex teeth
endured while biting Triceratops. They installed a cast of a real T.
rex tooth made of aluminum and bronze (which mimics the rigidity of
enamel) into a hydraulic mechanical loading machine--a substitute for
jaws that looks and acts a bit like a guillotine. A piston-powered bar
holding the tooth made punctures in a cow pelvis that mirrored those
in the Triceratops bone, and the team measured the amount of force
needed to recreate those wounds. Erickson chose cow bone for the
surrogate victim because it has a microscopic structure similar to
bone from Triceratops, also a large herb!
ivore.
One of the two tooth casts got dented when the scientists
underestimated their machine's power and the tooth penetrated the bone
completely, striking the steel table beneath it. Real-life rexs,
Erickson says, would have broken teeth occasionally after violently
impacting bone, and they regularly replaced each tooth every few
years.
To leave a half-inch deep mark in a bone, a T. rex canine would have
absorbed 1,440 pounds of force. By being closer to the jaw joint, the
rear teeth were even more powerful, and the team estimated a force
there of 3,011 pounds. (For the record, the most force that the rear
teeth of a human can generate is 175 pounds--suitable for cracking
Corn Nuts, but little use on pelvic blades.)
The results suggest that T. rex's dental arsenal is consistent with
the idea that they hunted live prey. A scavenger wouldn't need as much
bite to deflesh an animal that couldn't escape, and the strong teeth
of tyrannosaurs could presumably handle the torquing and compressing
that would be part of a day's work capturing and subduing gargantuan
prey.
The teeth of T. rex also closely resemble those of two renowned
modern-day hunters: American alligators, the dinosaur's closest living
relatives, and great white sharks. Like the alligator, T. rex has
stout, rounded canine-like teeth embedded and cemented in sockets
which can withstand large forces. Skulls of both species often display
bite marks from teeth used in intraspecific sparring. Alligators can
exert a bite force of just under 3,000 pounds when rapidly snapping
their jaws, but T. rex bites exceed this force with minimal effort.
Like the white shark, T. rex teeth exceed those of all their relatives
in size and bear serrated edges that can cut through bone. Serrations
run along the front and back of tyrannosaur teeth, as on a steak
knife, which suggests to Erickson that the dinosaur used "puncture and
pull" biting to inflict big cuts on the head, neck, or spine and then
perhaps let their prey bleed to death. Komodo dragons, though they
have relatively weak teeth, employ a similar biting and slicing
strategy on prey. But, says Erickson, "There is no great analogy
[among living animals] for T. rex. If there were we'd have a scary
world."
Thanks Erickson.
Anyway, given my new understanding between " equivocal" and
"conclusive" evidence, I must say that this shows rather conslusively
that the idea that T.Rex had a very nasty bite is more fact than
speculation.
(Ps. Even the greatest speculations about the maximum biting force of
T.Rex were exceeded by the researched figures. So the speculations
were technically wrong after all! But I guess this proves rather well
that T.Rex was nastier than we thought!)
from Josh,
age 12,
?,
?,
?;
January 10, 2001
Hmm, "equivocal". People around here seem
to be using that word a lot, being only twelve, I can't say I am as
skilled in english as them, so the frequent use of that word has
constantly confused me, does it really mean so much? How come the
simple word "equivocal" has been used so much in the brinning down of
most of MadHatter's views? I didn't quite understand it until I looked
it up in the online dictionary, I'll put it up here for your benifit:
Main Entry: equiv.o.cal
The thesaurus says this:
Entry Word: equivocal
So now I understand the meaning of "equivocal". It was a fashionable
word started by Levine. I must say, now armed with the knowledge of
the meaning of "equivocal", I must say, yes MadHatter, you are basing
a lot of your points on EQUIVOCAL evidence. I'm afraid they don't
carry much weight, in that case. Try something as Honkie would say
"solid".
Main Entry: 1sol.id
Or you could try finding something "conclusive"
Main Entry: con.clu.sive
Hmm, it looks like I went overboard with the online dictionaries, but
they're cool anyway.
Have a great week.
Pronunciation: i-'kwi-v&-k&l
Function: adjective
Etymology: Late Latin aequivocus, from aequi- equi- + voc-, vox voice
-- more at VOICE
Date: 1599
1 a : subject to two or more interpretations and usually used to
mislead or confuse b : uncertain as an indication or sign
2 a : of uncertain nature or classification b : of uncertain
disposition toward a person or thing : UNDECIDED c : of doubtful
advantage, genuineness, or moral rectitude
synonym see OBSCURE
- equiv.o.cal.i.ty /-"kwi-v&-'ka-l&-tE/ noun
- equiv.o.cal.ly /-'kwi-v&-k(&-)lE/ adverb
- equiv.o.cal.ness /-k&l-n&s/ noun
Function: adj
Synonyms: DOUBTFUL 1, ambiguous, borderline, clouded, dubious, fishy,
indecisive, open, problematic, suspect
Related Word: disreputable open to question
Text: 1
Contrasted Words clear, distinct, understandable; categorical,
explicit, unambiguous, univocal; certain, conclusive
Antonyms unequivocal
2 characterized by a mixture of opposing feelings
Contrasted Words assured, certain, decided, sure
3 3
Contrasted Words credible
Pronunciation: 'sä-l&d
Function: adjective
Etymology: Middle English solide, from Middle French, from Latin
solidus; akin to Greek holos whole -- more at SAFE
Date: 14th century
1 a : being without an internal cavity b (1) : printed with minimum
space between lines (2) : joined without a hyphen c : not interrupted
by a break or opening
2 : having, involving, or dealing with three dimensions or with solids
3 a : of uniformly close and coherent texture : not loose or spongy :
COMPACT b : possessing or characterized by the properties of a solid :
neither gaseous nor liquid
4 : of good substantial quality or kind : as a : SOUND b : made firmly
and well
5 a : having no break or interruption b : UNANIMOUS c : intimately
friendly or associated
6 a : PRUDENT; also : well-established financially b : serious in
purpose or character
7 : of one substance or character: as a : entirely of one metal or
containing the minimum of alloy necessary to impart hardness b : of a
single color
- sol.id.ly adverb
- sol.id.ness noun
Pronunciation: -'klü-siv, -ziv
Function: adjective
Date: 1536
1 : of, relating to, or being a conclusion
2 : putting an end to debate or question especially by reason of
irrefutability
- con.clu.sive.ly adverb
- con.clu.sive.ness noun
synonyms CONCLUSIVE, DECISIVE, DETERMINATIVE, DEFINITIVE mean bringing
to an end. CONCLUSIVE applies to reasoning or logical proof that puts
an end to debate or questioning . DECISIVE may apply to something that
ends a controversy, a contest, or any uncertainty . DETERMINATIVE adds
an implication of giving a fixed character or direction . DEFINITIVE
applies to what is put forth as final and permanent .
from Josh,
age 12,
?,
?,
?;
January 10, 2001
It looks like I'll have to play your game
to make you happy and quit whining about the lack of our expertal
support.
Frank Galef, a extremely acomplished zoologist and doctor, pointed out
that there are many more senarios that are more likely for the
behaviour of the raptors. He also did many leg-proportion experiments
to determine the nature of avian locomotion, and concluded that the
raptors are not as fast as previously thought, and also lacked in
jumping capacity. He also exaimined the sickle-claws of the raptors
and decided that they probally had a minimal role in killing.
Matthew Bonnan, theropod expert, fossil hunter, residential theropod
advisor at DINOSAUR. Studied sauropods for years before switching to
theropods. Experience with sauropod fossils convinced him that the
most obvious solution is not always right and applied that belief to
the raptors. He concluded there is no strong case for pack/big prey
hunting and stated that alternative ideas are more accucrate. Took
part in a few dinosaur digs before.
Forster, C., paleontologist. Wrote an article in "The Mosasaur" called
"The paleoecology of the ornithopod dinosaur Tenontosaurus tilletti
from the Cloverly Formation, Big Horn Basin of Wyoming and Montana."
Where he suggests alternative ways of approaching the Deinonychus
remains found nearby. Concurrs there is no solid link between the
suggested pack/big prey hunting theory and the Deinonychus-gawned
Tenontosaurus fossil.
Maxwell, W. D., and J. H. Ostrom. Both wrote a article "Taphonomy and
paleobiological implications of Tenontosaurs-Deinonychus associations"
in the Journal of Vertebrate Paleontology, 15(4): 707-712. Ostrom was
the very paleontologist who named Deinonychus. Despite suggesting the
pack hunting/ big prey hunting theory, Ostrom admits that there are
also other equally plausable theories that can be drawn from the same
evidence. Admits it's not INEVITABLE for Deinonychus to hunt in packs.
Matt Wedel, qualified biologist, reached the same conclusions on
raptor jump capacity and speeds as Galef. Proposes the dromaeosaurs
may be quite big time scavengers too.
Russell Hawley, education director of Tate, a question and answer
organization. Competent in zoology. Suggested raptors may not be as
smart, social or as mean as previously thought, basing his statements
on raptor braincasts and caompairative anatomy.
Mark Norell, paleontologist. Studied dromaeosaur skulls and suggested
that the raptors may not have been likely to hunt in packs, observes
some antisocial behaviour in dromaeosaurs.
Thomas R. Holtz, Jr, paleontologist. Also independently reached the
conclusion that the raptors were not as swift as commonly thought and
were "grapple and slash" hunters, limiting their usefulness in big
prey hunting.
Thank you
from Billy Macdraw,
age 18,
?,
?,
?;
January 10, 2001
Eh, brudder, wat tok u? All your professor
said was "prey size varies with predator" wat. I don see how it says
raptr must have huntared big prey. Also, i dink the professor also noe
that there is a limit to the prey size variation and the predator. So
weather he say matter more or not don matter for it kan be used agenst
you.
happy hour, brudder.
from Short F.,
age 14,
?,
?,
?;
January 10, 2001
To date, there is no satisfactory
conclusion as to if the dire wolves or smilodon did hunt in packs or
not. And it's it's amazing you can draw such a secure conclusion from
another species that died much longer ago...hmm.
Anyway, there is hard evidence for T.Rex having a nasty bite. Many
fossils have been found with T.Rex bite holes on them. Note the word
is not marks, but holes. That is very soild and concrete evidence that
T.Rex did have a very soild and nasty bite, scavenger or predator. I'm
sorry? Did I shoot donw another one of your points? Don't blame me!
You're the one putting up the targets! Give us tougher ones
please.
from Honkie Tong,
age 16,
?,
?,
?;
January 10, 2001
Hmm, I prefer to abstain from this, but
the others here seem to attack in a pack MadHatter, and they are
dispaching your points with ruthless efficiency. Well, the reason I
hold such views on the raptors is because my lecturer though me to do
exactly that. Disregard the "experts" and take a look yourself, you
might pick out something they've missed. I'm not kidding, even the
greatest expert in paleontology is not too far above the beginner,
that's because paleontology is like no other science, the tables are
pretty fair and nobody really has a lead on everybody.
I've noticed that you have based your arguments mainly on the
construction of the raptors, but I'm afraid as far as scientific
methods go, they can only be classified as speculation. What that can
break or make your case is hard evidence. Want to prove big prey
hunting? Find a fossil of a big animal with a raptor tooth stuck in it
or something, something that shows that it had survived an attack.
Want to prove pack hunting? Find a trackway that shows a group of
raptors attacking an animal. Get what I'm driving at? Even the word of
the best expert in the world remains as good as a guess by a beginner
if there is no hard evidence.
The reason prehaps the rest seem to be so devastatingly effective on
your points and your ego is that they did exactly that. Instead of
trying to draw untestable and therefore uncertain information from a
fossil, they've based their arguments on hard, solid ground. Quoting
an expert is good, but standing on hard evidence is even better, no
matter what an expert insists is not going to make a grey elephant
white.
I'm afraid that your attackers have decided to stand on hard ground,
by questioning the big prey and pack hunting theory via statically
based lack of evidence, common physiology, and common sense. These
things are hardly deniable by no matter how strong the word of a
expert. Even my lecturer would have been proud of the case they
constructed, had he read all this. (but I think he'll disapprove of
them swarming you)
And not only that, they've attacked your main line of defense, which
is via what the fossils of the raptors themselves tell us, by
proposing alternative ideas and finding flaws in yours. I suggest you
stop scolding them and engage them at the same game, finding
non-equivocal evidence to support your case. Look, take a look at what
the raptor skeleton can tell us and you'll notice that most of the
evidence on their bodies is equivocal, non supporting or denying your
idea. That's good, but to build a case, you must find evidence that
utterly screams your case, not one that agrees one moment with you,
and later to an alternative idea.
I'm not trying to condone what the rest did to you, trying to oppress
you or what, but I'll be telling a lie if I said that because of that,
you argued a better case. They did, and I cannot deny
that.
from Levine,
age 25,
?,
?,
?;
January 10, 2001
Another idea for the fanfic section. Could
you put up a header telling us what was the most recent
addition?
from Honkie Tong,
age 16,
?,
?,
?;
January 10, 2001
Good idea. It's up. JC
May I also add, the whole theory about
T.Rex and his "nasty bite" is all in speculation too, so you cant rear
that one up about how deadly T.rex is anymore. Not to mention it is
now fact smilodon bit through the throat of prey to severe blood
vessels and windpipe, and with teeth like that, he could have taken
prey bigger than himself, even compared to lions, not to mention
smilodon has been found in large numbers, ahhh but before you say
anything, dont forget the dire wolf. Were they both loners? Packers?
And you do not need to use overly sophisticated words to win your
argument, that just shows ignorance man.
from MadHatter,
age ?,
?,
?,
?;
January 10, 2001
HonkieTong, you do not have to talk down
to others and finish it off with a thanks. Speaking of unscientific,
thats just ignorant. What bothers me about you is you never tell me
where you get this information, Im not doubting you, just
curious.
from MadHatter,
age ?,
?,
?,
?;
January 10, 2001
Chandler, thats what Ive been trying to
say about "raptors" for a long time, and people try to shoot down
eveyrthing I say, but not what you say. Is it how you say it, or is it
your just known better on this thing??? I guess you dont have a "pack"
forming around you, huh?
from MadHatter,
age ?,
?,
?,
?;
January 10, 2001
Also, Levine's and Honkie Tong's ideas DO
weigh less than a actual pro, WHY???, he has been in it longer, got
his degree, wiser, longer time in the study, more experience, been
through and graduated college with this as his major under his belt,
wrote books on facts, etc. SOmethings they do say is wrong, but the
things they say has a greater degree of truth to it rather than an
amateur. I know you just going to disagree with some long speech, but
its true no matter what. I guess I may have been wrong about the
raptors, but thats ok, Im still an amateur in highschool, busy with
much more than paleontology on my time. Lilian T. needs to stop trying
to correct me, becuase she never thinks for herself, just agrees with
what the majority says in here. Then all the people who keep
commenting under constantly changin names, get some guts and post 1
name on here! About the raptors, as far as I know, the foot and hand
were more advanced than amost other theropod's for cutting with force, but thats from the foot and metatarsals
and forelimbs and manus. Lilian if you want defense, look at something
like theriznosaurus, apatosaurus and prosauropod claws...I dont even
wanna waste my time talkin to you, what am I doin.
Haha.
from MadHatter,
age ?,
?,
?,
?;
January 10, 2001
Your correct, but notice this is coming
from someone who is new to this and is constantly ridiculed when the
ridculers dont question each other. It may not be fully scientific,
but its a smart thing to do, to accept advice from a amateur rather
than a pro is a intelligent thing to do, nonetheless. . Anyway, where
did you get the new raptor info and where did you get all this
information. Please answer.
from MadHatter,
age ?,
?,
?,
?;
January 10, 2001
I prefer to avoid even slight
rationalization unless I have really solid evidence staring me down
the face. Drawing the rationalization that raptors hunted in packs
from a few fossils is not a good thing to do. This was the folly of
many paleontologists, who presented their "rationalizations" to the
media who accepted it as fact!
from Billy Macdraw,
age 18,
?,
?,
?;
January 9, 2001
Actually, I don't enjoy shooting down
popular ideas. I used to think that it was for sure that the raptors
hunted in packs and took on big prey, as we are told. But what I was
not aware of until recently was that that idea has not been proven nor
is it FACT! It was just somethign that was so exciting that it got
repeated so many times by the misguided media and paleontologists that
it becomes gosple and accepted as such. As of now, almost anybody you
try to convince that there are alternative ideas seem to take it
offensively, despite having so little evidence to support their claim.
I still think deducing pack behaviour is a little too far to go from a
few associated fossils. At the very best, we can assume social
behaviour, but never pack behaviour. It's a classic case of
over-assumption. Offically, it means pack hunting is not a valid or
conclusive theory to draw from these fossils.
Also another thing, and if that's the case, why do people take it that
it's CONFIRMED that the raptors went around slaying herbivores in
packs?
from Honkie Tong,
age 16,
?,
?,
?;
January 9, 2001
I think you got it Chandeler, my objective
here is to prove that the idea of pack-hunting, big-prey killing raptors
is not any more likely to be correct than other ideas just because its
more exciting or popular. But what I learned from the others so far
seems to prtove that it's ACTUALLY less likely for the raptors to hunt
in packs and take on big prey!
Thus, the debate drags on...
from Honkie Tong,
age 16,
?,
?,
?;
January 9, 2001
I wasn't saying that all deinonychosaurs
hunted in packs, and I also wasn't "unitarianizing" or whatever all
dinosaurs from one bird-like behavior. That's just one rationalization
for the discovery of deinonychosaur skeletons together (as if in a pack,
graveyard, disaster, etc.). There's really no point in dragging this
any further...we aren't getting anywhere. Honkie, you sure like
shooting down popular ideas just because they are "popular" though:)
Usually this is a good tactic (hehe) but not always.
from Chandler,
age ?,
?,
?,
?;
January 9, 2001
I've noticed that MadHatter has a habit of
defining how much "value" a person's words carry based on his position
in soceity. That's an unscientific way of doing things. Honkie can be
correct and he still will be, no matter how good your "professor" is.
If anything, MadHatter, your words probally don't mean as much around
here, given they way you do your research. Quit quoting people that
agree with you as they migh also be wrong, open your eyes and look at
the evidence yourself instead of hiding behind Bakker, Horner, Larson
or Cope or Dong Zhiming, they may be wrong.
from Jon F,
age ?,
?,
?,
?;
January 8, 2001
Arguments for and against raptors hunting
in packs and taking on big prey:
For
. Pack hunting was the only way for the raptors to bring down large
prey, thus they must have employed it.
. The raptors all have a very high EQ, making them intelligent, giving
them the capacity to work in organized packs.
. The raptors were armed to the teeth in a series of blades and claws,
and that would have made them extremely deadly indeed.
. Using comparative anatomy, one can link up the saber tooth cats
which brought down large prey, to the raptors, thus, the raptors were
capable of killing animals many times their size.
. Fossils of raptors have been associated with fossils of sizable
herbivorous dinosaurs, meaning they must have hunted in packs and
brought down big prey.
. Bigger raptors like Utahraptor were even deadlier than ever, meaning
they could take on even larger prey in a pack.
. The raptors were agile and fast, and were also good jumpers,
enabling them to jump onto their prey.
. It is obvious that raptors did hunt in a pack.
Against
. Who says the raptors must have brought down large prey? They could
have been content with smaller animals, eliminating the need for a
organized pack, a social group maybe.
. EQ is not a conclusive way to determine intelligence. Besides, EQ
alone cannot determine behavior, which has to be investigated via hard
evidence, not EQ.
. Granted, the raptors do own a impressive set of blade and claws, but
were they good for hunting big herbivores? In terms of hunting, no
modern day big prey hunter is know to effectively use slashing as a
primary way of killing, but rather, going for the neck of the prey
with a killing bite. Given their size, it means that even a raptor
like Utahraptor would have to clamber up a large animal to go for the
neck. One must remember these animals were not static targets, but
would certainly rear and buckle and run when attacked. It's safer and
equally plausible to assume that the raptors would have used that set
of claws against smaller animals.
. One CANNOT link saber tooth cats up with raptors via comparative
anatomy for the reason they were different. Saber tooths kill by
stabbing and bleeding their prey with their specialized canines,
something the raptors do not have. The raptors were slashers and
biters, not stabbers. To do a valid comparative anatomy, one has to
look at other slasher/biters.
. Finding fossils of dead animals show that they are indeed, very
dead. Finding associated fossils do not implicate social behavior
anymore than finding a collection of dead flies around a dead rat.
Also, that piece of fossil evidence is equivocal, it doesn't tell us
convulsively if the raptors were scavenging from an-already-dead
animal or killing it. It's another case of drawing the wrong "facts"
from too little evidence.
. Certain factors will come into play more when size increases, its
simplistic to say that if a Deinonychus
. Widely accepted statements about the agility and the speed of the
raptors have been derived from over simplistic study of the raptors.
The latest studies seem to indicate that the raptors may not have been
as fast as they were though to be nor jump as high. If anything, the
raptors seem to have the most limited maximum speed for their weight
class of any carnivorous dinosaur. New estimates of their jump
capacity are also much reduced from the original estimates.
. Once again, there has been no solid evidence indicating pack
behavior. Pack behavior is truly complex and cannot be simply equated
with raptors based on scant study. The raptors probably had some sort
of social life, but the question remains if they did hunt in organized
packs. If they did, the evidence should smack us across the face,
instead of us poring over every single bit of bone to find anything
even vaguely supporting the notion. It's time to let the evidence
speak out for themselves.
could leap up a meter, then a Utahraptor, being three times the size,
would have been able to leap up three meters. This is certainly not
true. Big raptors suffer from a much reduced leap capacity due to
their weight, which would make us question what its "deadly" foot
claws were for if it could not bring them into play as effectively as
its smaller counterparts. If anything, Utahraptor if not as deadly as
it seems. A Tyrannosaurid design of the same size would have hunted
more effectively. Also, there has been absolutely NO evidence to show
that Utahraptor did hunt in a pack.
from F Denota,
age ?,
?,
?,
?;
January 8, 2001
In his book _Dinosaurs - the Textbook_,
Spencer G. Lucas argues
The jury is still out on the question of the advantages of pack
There is this theory stating that the extinction of the dinosaurs
Anyway, I guess its hard to prove either way, because big prey hunting
and pack hunting is behaviour that is impossible to tell for certain
just from the fossils. Finding trackways of a group of dromaeosaurids
still dosen't prove pack hunting, just that they were social.
Of course, the changing face of paleontology has quite changed our
view of the raptors, they were not as fast or as smart as previously
thought, they were no longer the king predators (before Horner, some
people suggested that they might have stolen kills from Tyrannosaurids
by chasing them away...of course, everybody assumed at that time that
Tyrannosaurids were mainly solitary). One thing I can be sure of is
that the dromaeosaurids did hang around one another in some species,
but stayed alone in others. The sickle claw could have more likely
served some kind of a defensive function instead of a hunting one.
But one must know and accept that any theories for pack hunting is
based on at best, equivocal, no matter how popular these theories may
be. You can argue as violently as you want, but your argument is only
as good as your evidence. There is also a serious lack of evidence
showing unsucessful big prey hunting that could finally put this to
rest.
As much as you would like to argue Madhatter, there simply just is a
lack of evidence showing big prey hunting. What makes so so certain
that Velociraptor hunted Protoceratops? Why haven't we found evidence
of that?
violently that dromaeosaurids lived in "packs", but that there is
no
evidence that they lived in "herds". He must know something about
the
deeper meanings of these words that we don't.
hunting insects. Smaller dromaeosaurids, feeding on lizards and
insects, might still have stuck together in groups because they
couldn't think of anything smarter to do. Fish do it.
was due to murderous packs of giant raptors becoming so effective
that they ate just about everyone else before disappearing out in
space. It's still under some debate what propulsion system they
used
for their rocket ships. I love it when dromaeosaurid fans take their
theories to the extreme;-)
from Jon F,
age ?,
?,
?,
?;
January 8, 2001
Eagles do not hunt anything that they
can't carry off, making them small prey hunters.
Thanks.
from ?,
age ?,
?,
?,
?;
January 8, 2001
What I'm trying to do here is not to
absolutely prove that the raptors were big prey hunters, but that it
was not necessary true that they hunted big prey or that they hunted
in packs.
from Honkie Tong,
age 16,
?,
?,
?;
January 8, 2001
Well, if you assume the raptors were big
prey hunters, than the early Tyrannosaurids must have done better as
they overrode the raptors and forced them to the sidelines by the late
cretacous.
from Levine,
age 25,
?,
?,
?;
January 8, 2001
A serious lack of scientific courtesy over
here, if I wanted to debunk Einstein when he suggested that it's
impossible to travel faster than the speed of light, would I say
"Newton was a bigger guy than you, and he said that speed can increase
with no limit. What he says carries more weight than you, so what you
say is not as important."
YOU DO NOT QUOTE PALEONTOLOGIST PROFESSORS AND USE THEM TO DISCREDIT
PEOPLE NOT AGREEING WITH YOU. STOP PICK AND MIXING YOUR VIEWS! THAT'S
UNSCIENTIFIC!
from Honkie Tong,
age 16,
?,
?,
?;
January 8, 2001
Well, I for my part do not assmume that
they did not hunt in packs, but I figured its not any less likely than
them hunting in packs. The problem arises when there is a serious
dirth of good evidence supporting the pack hunting theory. Most of the
good evidence we've found so far seem to support solitary behaviour in
the animals, while that supporting pack hunting is yet to come up with
anything good.
I don't think pack hunting was necessary to raptor behaviour had they
went around alone, terrorising smaller animals, which they would have
done well. I find it odd that people assume that they must have hunted
in packs when it's not necessary so! Not to mention we have so little
evidence to support pack hunting! How did you draw up that idea at
all? Do your points lack null intergity?
from Honkie Tong,
age 16,
?,
?,
?;
January 8, 2001
I'll do it this time Levine,
Well Chandeler, I don't think its too good to describe raptor
behaviour via modern birds. Because...
What you are doing here is actually using the well known
Yikes!!! No! Once again, flag called on account of misue of the
Principle of Uniformitarianism! (That principle is normally used in
conjunction with geologic processes, and not biological ones, anyway).
It is NOT safe to assume that all behaviors found in the modern world
were present in earlier times. Heck, you could then argue
"domestication occurs in the Holocene, therefore early primates (non
Homo sapien) domesticated animals too!".
For complex behaviors, or behaviors currently restricted to a single
clade like hunting big prey,you cannot just assume they were present
at any earlier time. If you are proposing unusual (derived or complex)
behaviors for some fossil form, you should back it up with some sort
of testable or supporting evidence (morphological structures which
correlate with that behavoir; phylogenetic bracketing; good old
fashioned taphomony (can't be beat!); etc.).
Thank you.
Principle of Uniformitarianism. This means what is happening now
happened way back when too. Since taking in flocks happens now in
birds, it seems relatively safe to assume that it occurred back in the
Mesozoic via the raptors as well...
from Honkie Tong,
age 16,
?,
?,
?;
January 8, 2001
Those leg claws? Well, they remind me of
defensive structures. They were mounted on the end of a mispropotioned
leg to facilate their use. Not to mention that Trodoon, (a non big
prey hunter) had them too. They probally used them for defence, like
that fossil shows. The Velociraptor was defending itself. Those claws
were good for defence, not offence.
from Lilian T.,
age ?,
?,
?,
?;
January 8, 2001
You still don't get it do you? Anything
said in paleontology by no matter how experienced a proffessor is fair
game as paleontology is not fixed. Nothing that professor said will
carry more weight than what Honkie or Levine said for the simple
reason that there are no rules in paleontology. You can be the best
paleontologist in the world but still be beat by a nine year old on a
certain subject. So did I immediately assume that T.Rex was a
scavenger the moment Horner said so just because waht he says matters
more than others? Seesh, this is science, not politics. I don't care
what Horner or Bakker says, as long as its not fact but specualtion or
ideas, its open to attack.
Yes, I do think that the size of prey varies with the predator, but
ah, that's a equivocal statement your proffesor made. If you ask me,
it carries no weight as it does not support nor deny the big prey
theory at all. Do you mind, stop using these equivocals to confuse
people?
We're looking at very varied weight difference here you know, from 12
times your weight to 300 times. Even the most the saber-tooths managed
was prey 10 times their size, and they were using all their
specialized stabbing equipment. Heck, if what you say is true, I'd
expect to see crows killing an elephant. Size does matter, there is a
pratical limit to the difference in size between the predator and
prey.
Anyway, Megaraptor is NOT a RAPTOR AT ALL! Raptors do not include
species like Troodon or Unenlagia! As desperately as you would like to
enlist Megaraptor into the "raptors", modern paleontology refuses
that. Anyway, I can't figure why Megaraptor should be a raptor at
all,metatarsals all wrong, pubis too ventral, ischium lacking a proper
obturator, and long bones much too light. And the skull's palatal was
too thick, antorbital fenestrae too rostral, distal carina too small,
not to mention the trenchant ungual was hardly present…oh, the list
goes on. I didn't know what you are thinking, but Megaraptor is
certainly not a raptor.
from Billy Macdraw,
age 18,
?,
?,
?;
January 8, 2001
I suppose you should be careful in using
the term "raptor". Megaraptor was not really closely related to the
dromaeosaurids at all. From what I study, the term "raptor" refers to
the dromaeosaurids, not inclusive of protot-ungulates, troodonts or
anything else. Heck, if you really wanted to do your classification
this way, all of Tyrannosauria would be included under "raptor" too.
Now, the term "raptor" describes a group in Coelurosauria called
Dromaeosauridae of which Utahraptor was the largest. That's as offical
a defination I can give you for the term "raptor", use your cladistics
and you'll see your error in your eariler post describing "raptor"
And yes, if you ask me, I do think that any compairism with
Tyrannosaurus, though in the sprit of competion, does hold some water.
If you ask me, I personally feel more effort has been put into to make
sure no stone has been left unturned to get a clear picture of
Tyrannosaurus. When we look at the raptors, there is a serious dirth
of real research into looking into the equally pausable ideas that
they may have been small-prey hunters.
I'm not sure what you mean when you say less well rounded, but my
suspision is, the raptors did not have to use their arsenal of claws
on anything larger than a small, two-meter dinosaur. All they would
have done is to hould onto the prey with their forelimbs and bite it
with their jaws, finishing it in very short order. You can't expect to
do this to larger prey though.
Surprisingly, the utility of the sickle claws are diminished as size
increases. A Utahraptor can barely leap due to its weight, to bring
its leg claws into use. (Not that I think Megaraaptor is a raptor, but
he would have been even less capable of doing so) So these claws, if
present in the larger species, seem not to have a killing
role.
from Levine,
age 25,
?,
?,
?;
January 8, 2001
For the last time, GOODNESS
GRACIOUS,MEGARAPTOR IS NOT A dromaeosaur. "Raptor" refers to members
of the dromaeosaur family, don't make up your own definations. The
offical defination for the term "raptor" in paleontology refers either
to modern day birds or prey or the members of the True dromaeosaur
family. NOTHING MORE, NOTHING LESS. Troodon was not a "raptor",
niether was Megaraptor.
from Honkie Tong,
age 16,
?,
?,
?;
January 8, 2001
Yes there are huge raptors. A raptor is a
dromaeosaur or something related, like Troodon or Unenlagia. Ive
noticed some obessiveness about how much better T.Rex is when Im not
even talking about him. This shows me that its more about, who "we
think is cooler" type stuff and a put down of who we dont like.
Raptors werent like they were portrayed in the media, no, but they
were just as capable as any other theropod. Eagles arent the most buff
animals, yet they are deadly enough, and this is with land animals and
even animals larger than themselves. Raptors were ambushers and
grapple/slashers. THey had a good reach, large claws, and in the early
cretaceous, raptors were large predators. Those claws were used, and
it is shown that in the mongolian fossils, the raptor was kicking
with its feet and clawing the face. They were less powerful and
kickboxer like than I thought, but they were still very capable
predators, not another meal on the food chain.Now on to my "educated guesses." First, it's difficult to imagine that
dromaeosaur ("raptor") dinosaurs did not slash with their claws. Of
course, many dinosaurs used their claws for stability and traction
(think of golf shoe cleats). Certainly raptor claws served this
purpose to some extent. However, and especially in the case of
raptors, their specialized, retractable "killing" claw must surely
have been used as its name implies. What else would a 14" Megaraptor
claw (held above the ground while the dinosaur walked) be used for?
The questions about jumping ability and and strength are a bit
trickier to answer with authority. Knowledge of either attribute must
be based on a surprisingly detailed knowledge of the animal's skeletal
and muscle engineering. Of course, this isn't always clear from poorly
are partially preserved skeletons and these are the sorts of issues
that could only truly be enlightened by observing the living dinosaur.
That said, we can see many similarities in skeletons of modern day
predators. And the best analogy to raptor dinosaurs is probably the
"raptor" birds like hawks and eagles. If these comparisons tell us
anything, then we may deduce that while dromaeosaurs, like eagles,
were not strong compared to T. rex or Brachiosaurus or Blue Whales,
they no doubt possessed profound agility for capturing prey.
As to size of prey, this probably varied with the predator. .
This has been answered by a paleontologist, professor, which means,
what he says is more than anything honkietong and levine say... "not
to diss you levine, your the man"
from MadHatter,
age ?,
?,
?,
?;
January 8, 2001
There are no "huge" "raptors."
_Utahraptor_ is the largest known, like it or not, at 20 feet.
_Megaraptor_ probably is not even deinonychosaurian at all, but some
deinonychosaurs like _Achillobator_ may have been larger than
_Utahraptor_. But no "raptor" exceeded 25 feet and/or could compete
with larger predators for larger prey. I do believe that some
deinonychosaurs did hunt in packs though, but they certainly didn't
hunt extremely large prey. But some of the assumptions about
deinonychosaurs not being able to hunt in groups and attack
_Iguanodon_-sized animals are just strange. Raptors were built
solidly for their size with a well-reinforced ribcage and I don't
think that a fall from an iguanodont would really be a problem in all
honesty. It's the iguanodont trampling the predators that would be
the most dangerous part about hunting. And as for pack hunting, it is
usually associated with advanced intelligence but as Gregory Paul
says, the
connection between brain size and predation is not clear, and
therefore the connection between brain size and hunting behavior is
not clear. Raptors could have very well developed advanced hunting
techniques. Birds gather in flocks (not to hunt however) so dinosaurs
probably exhibited similar behavior for hunting. Maybe the tribe,
pack, pride, or whatever you want to call it in dinosaurs is ancestral
to the condition in birds.
from Chandler,
age ?,
?,
?,
?;
January 8, 2001
I dont think you guys know how hard Ive
tried to find recent information on the raptors, and for me its really
really hard. The newest stuff I can find is from 1999 about
Megaraptor. Then you guys have more time than I do to find stuff, I
dont have that much time, but I try. Thats about it. If raptors used
grapple and slash, why were theyre claws less rounded??? Easier
slashing? Please answer Levine/
from MadHatter,
age ?,
?,
?,
?;
January 8, 2001
IM NOT TALKING ABOUT LATE CRETACEOUS
RAPTORS! Damn. You keep insisting the ones around with T.rex. Stop
being so damn obsessed with T.rex alright. It gets old quick. Im
saying, what about the raptors in the early cretaceous??? The huge
ones who could compete with larger predators who werent much larger,
like the acrocanthosaurus? The allosaurs of Gondwana? How did raptors
do then? Not late cretaceous.
from MadHatter,
age ?,
?,
?,
?;
January 8, 2001
Erratom notice:
I typed:
It should have been
Thank you.
(Don't get my post mixed up with Honkie's, where's the
line?"
"Anyway, comapirative anatomy helps us to derive function, not
behaviour. Most of your "compairative anatomy" arguments seem to
describe FUNCTION. That's not a good or correct way to use
compairative anatomy."
"Anyway, comapirative anatomy helps us to derive function, not
behaviour. Most of your "compairative anatomy" arguments seem to
describe BEHAVIOUR. That's not a good or correct way to use
compairative anatomy."
from Levine,
age 25,
?,
?,
?;
January 8, 2001
I fixed the line and changed the text. JC
Mad Hatter, don't you think Levine and
Billy Macdraw have made a compelling case AGAINST the raptors being
pack-hunting, big prey hunters? They seem to have done an in-dept
restudy of the raptors, more than any raptor fan I have seen to do.
Don't you think you shoud revise the way you think about the raptors
too? Do your ideas hold water? Are they based on conclusive or
equivocal evidence? Are they testable? Are they repeatable by other
researchers? Are they falsifiable and do they have predictive power?
Most of our old ideas on raptordom fail all these tests miserably,
hence the current revision undergoing raptors now. The new crop of
budding paleontologists now question, instead of accept many ideas
about the raptors for the simple fact they were not fact! It's NOT a
fact that the raptors were hard hitters, it's NOT a fact they hunted
in packs, it's NOT a fact they must have been big prey hunters. Now,
the reason being that these ideas remain as ideas and should not be
mixed up as fact. Because to be fact, your ideas have to pass the
forementioned tests, something they have yet to do. If anything, it
seems that the contray ideas about the raptors are gaining
ground.
from Honkie Tong,
age 16,
?,
?,
?;
January 8, 2001
Mad Hatter, it dosen't matter if the
raptors were hard hitters or not, they simply lacked the right methods
and weapons to bring down large prey. Raptors seem to employ a grapple
and slash method, much like modern day eagles, which kill their prey
by grappeling them and then tearning them apart with their talons.
Modern big cats employ a different method with different tools, of of
which a raptor could not have done.
Besides, the grapple and slash method is useful for disabling animals
about your size rapidly, but is virtually useless against bigger
animals capable of absorbing more damage. So I don't see any reason
why the raptors would have been best suited to hunt big prey. If they
did, it would not have been their usual mode, not even for
Utahraptor.
from Lillian T.,
age ?,
?,
?,
?;
January 8, 2001
Well, Madhatter, you have sadi that "many"
paleontologists have used "compairative anatomy" to link raptors and
cats, once again, this is not true. From what I know, only Bakker is
known to do that, and he names it an "antology" not conclusive
"compairative anatomy".
Anyway, comapirative anatomy helps us to derive function, not
behaviour. Most of your "compairative anatomy" arguments seem to
describe behavior. That's not a good or correct way to use
compairative anatomy.
What you are doing here is actually using the well known
Yikes!!! No! Once again, flag called on account of misue of the
Principle of Uniformitarianism! (That principle is normally used in
conjunction with geologic processes, and not biological ones, anyway).
It is NOT safe to assume that all behaviors found in the modern world
were present in earlier times. Heck, you could then argue
"domestication occurs in the Holocene, therefor Late Cretaceous
coelurosaurs domesticated Late K Asian protot-ungulates".
For complex behaviors, or behaviors currently restricted to a single
clade like hunting big prey,you cannot just assume they were present
at any earlier time. If you are proposing unusual (derived or complex)
behaviors for some fossil form, you should back it up with some sort
of testable or supporting evidence (morphological structures which
correlate with that behavoir; phylogenetic bracketing; good old
fashioned taphomony (can't be beat!); etc.).
Anyway, there is no strong similarity between the raptors and the big
cats, so no, campairative anatomy and the Principle of
Uniformitarianism cannot be used to support your claims. The raptors
were no hard hitters, and no, I don't think they could be alikened to
arboreal carnivores too.
But then again, I have no idea why you keep insisting a raptor HAS to
take on big prey. There were a lot of other genera of dinosauria that
were smaller, safer, and easier to catch than the big herbivores, not
to mention exploting these food sources, the raptors worry little
about direct competition from the big carnivores (aka.T.Rex). If you
ask me, the raptor design seems to exploit this, their design is not
really what you'll expect for a big prey hunter. Poor jumpers with
great acceleration but a moderate speed. Not to mention an inability
to inflict a magitude of damage on the target. These animals took
mostly prey their size or smaller, not bigger.
Principle of Uniformitarianism. This means what is happening now
happened way back when too. Since hunting big prey goes on now in big
cats, it seems relatively safe to assume that it occurred back in the
Mesozoic via the raptors as well...
from Levine,
age 25,
?,
?,
?
January 8, 2001
I, too, have never ceased to be amazed by
the incredulus claims made by certain paleontologists on the raptors.
I must admit that some of these claims are so convincing, that faced
with a constant barage of them, one becomes more and more inclined to
believe them.
Also, one is tempted to believe them precisely becasue they tell us
what we want to believe- that the raptors were the deadilest, pack
hunting, fast and clean killers of big animals.
Restraint and rational rethinking of the evidence are the bane of any
urban lifestyle, Hence, these paleontologists either avoid mentioning
these essentials, or present them reluctantly in fine print, often
without emphasis.
Advising overzealous individuals on thinking about the raptors
sensibly has thus become a gargantuan task.
Often, they seek a incredible and incredulous word from
paleontologists to rid themselves of any doubts, failing to be
convinced that their original ideas need to be thought through slowly
and nonommiting contradictory evidence that may help them to achive a
accucrate picture.
I'm also troubled by people who scream: "Come on, its obvious raptors
were big prey hunters, just look at the claws, they were hard
hitters!"
It's ridiculous to exhort a statement like this for such superfical
reasons.
Our society must not adopt the compulsion to accept ideas about
dinosaurs based on how cosmetic, romantic or exciting they may be,
ommiting the fact that these ideas may have been based on sketchy or
fragmentory or equivocal evidence.
Rather, the priority should be to achive a rational, detailed and
nonommiting approach to dinosaurs and attain an accucrate view of them
by questioning, not accepting exciting ideas.
Sad to say, there is no shortcut to effectively obtaining even a
vaguely correct view of the raptors.
Looking at Tyrannosaurus, much ink had been spilled and many a fossil
have been studied and debated into finally putting him up as a
powerful predator with keen senses with some form of social behaviour
decended from the Coelurosaurs, as opposed the simple and
widely-accepted old theory of it being a slow, solitary scavenger with
poor eyesight decended from the Carnosaurs. One can just see the great
difference that can be put up once ideas are put aside and the
evidence restudied in even greater detail. Needless to say, the new
ideas about T.Rex were not popular at first, but have now emerged as
the shining glory of detailed paleontological work.
Looking at the raptors, one cannot but must notice the great
difference in the amount of work done restudying the evidence. We seem
to have gone so far on vague and sketchy evidence that we have
forgotten to restudy the evidence at hand and draw new and more
accucrate evidence from it. Granted, if we did so, the new, and more
accucrate image of the raptors will be extemely different indeed.
But do people want it that way? Maybe we don't, maybe we prefer to
think of the raptors as the superefficent movie-monsters they so
vividly represent in our minds. Any other idea or approach may be
considered heretical or offensive. We don't want to change our way, we
don't want to look at things from a clearer point of view, we hate and
detest the paradigm shift.
But that we cannot avoid, it will happen, even as we contuine to
support our cherished ideas about the raptors, the true fossils sit in
the musuem and scream out for somebody to take another look at them, a
closer look.
And like T.Rex, our old ideas about the raptors will be forcefully,
painfully changed, just like the changes, Newton, Einstein and Lorenz
have bestowed upond us. The paradigm will shift.
It's almost paradigm and our old ideas about the raptors will not
matter, for everything looks different, on the other
side.
from Honkie Tong,
age 16,
?,
?,
?;
January 7, 2001
My, you seemed to have convinced yourself
that it is unavoidable to classify raptors as hunters of big prey,
have you not?
Well, tell me why you think so and I'll give you alternative or
contradictary theories based on fact, are you game?
from Levine,
age 25,
?,
?,
?;
January 7, 2001
Arboreal, are you suggesting raptors could
climb trees? Unlikely man, they'll kill themselves. And yes,
Megaraptor is not a raptor.
Anyway, I don't think Utahraptor was a big prey hunter, it looks the
sort to take on Hypsilophodon, not a Iguanadon. And yes, Levine is
correct, the raptors lack the porper equipment to take on large prey.
And no, it's not obvious from the bodies of the raptors that they were
large prey hunters, it seems to point in the opposite direction, given
that they most likely did not hunt in packs.
from Lillian Tay,
age ?,
?,
?,
?;
January 7, 2001
Gee, I don't see baboons taking on
wildebeast. What makes you so sure they hunted in packs anyway? Based
on evidence that points both ways? Tsk tsk tsk.
from ?,
age ?,
?,
?,
?;
January 7, 2001
Well, I got the info from my local musuem
paleontologist. Levin also helps, he studies paleontology and zoology
if I'm not wrong. Soem of my deductions were also based on my basic
understanding of biology.
from Billy Macdraw,
age 18,
?,
?,
?;
January 7, 2001
Quite accucrate. A machine gun stands a
marginal chance of destroying a jeep, even if you have a number of
them. What you need is something that deals a lot of damage to a
single location, like an anti-tank rocket.
from Billy Macdraw,
age 18,
?,
?,
?;
January 7, 2001
Well, for one thing, Megaraptor was not a
raptor.
Well, hunting big prey needs a lot of specialization, and its those
adaptions I fail to see in the raptors. It had no stabbing equipment
it could use to disable big prey rapidly or bleed it to death. As for
Utahraptor, I do know that its unlikely for one to sucessfully bring
down a Iguanadon by itself...not to mention they did not hunt in
packs.
Another thing, what is seemingly obvious in paleontology is usually
not correct. We used to think that the dome-headed dinosaurs directly
butted heads, but that idea is wrong of course. Now, revising what we
do know about the raptors seem to tell us that the raptors do not and
cannot kick well, run extremely fast, hunted in packs, nor jump really
high.
from Levine,
age 25,
?,
?,
?;
January 7, 2001
Billy Macdraw, I happened to see that you
said something like: "Raptors attacking an iguanadon would be like
someone using naplam on a tank." I think that it would be more like
using machine guns on a jeep. Also, I think that raptors COULD twist
and swerve in mid air. Don't think that I thought that you were
referring to me in the post, but I think that you have no idea what
raptors were really like.
from JOE BOB B.,
age 10,
Menlo Park,
?,
?;
January 7, 2001
Josh, a 5 foot tall raptor
can not compete to a tyrannosaurus Rex, but compare them of the same
size. Of course, T.rex is more deadly, but try albertosaurus, or
something like alioramus, with slender knife teeth. Cut down on the
hostility son. If raptors werent kickers, than they may have been
something like baboons(highly carnivorous kind) or arboreal
carnivores. But then comes things like Megaraptor and Utahraptor. What
were they then. Just giant snacks? I doubt that. Too heavy to be
arboreal also. Billy, waht you say about raptors, where did you get
the info?
from MadHatter,
age ?,
?,
?,
?;
January 7, 2001
Hmm...I'm not sure if the raptor were
heavy hitters, they lack a serious amount of oral firepower. What a
raptor would have done at best would be to give an animal a lot of
shallow but wide lacerations, certainly not as "heavy" as a 3 foot
wide, 4 foot long and 1.5 foot deep Tyrannosaurus bite.
from Josh,
age ?,
?,
?,
?;
January 7, 2001
Well, I do think that the raptors would
have been extremely nasty to small prey like a bipedial primate like
me, but they have the wrong type of tools for bringing down large
animals! You can't just look at a raptor and see how much firepower it
has and assume it could kill Iguanadon. It had all the wrong
equipment! It had a serious lack of penetrating surgical equipment.
You knwo what, I think most people have an unrealistic view of the
raptors, they think it to be too nasty.
from Billy Macdraw,
age 18,
?,
?,
?;
January 7, 2001
What do you mean by "clean"? Do you mean
efficent or what? I donno, if the raptors did attack a Iguanadon, it
would ahve been anything but fast and clean. They would have taken a
long time (if they could) to bring down that 7 tonner by their
slashing(if they could again) It would have been messy and cost the
lives of a few raptors too. Given all that, I suppose a Tyrannosaurus
coming in to kill its prey with a single shoveling bite would have
been "faster" and "cleaner"
It also puzzles me that you can deduce so much about raptor behaviour
from their bones, and be sure about it. If you ask me, Bill's
deduction seems more rational and less "movie-logik"
from Josh,
age ?,
?,
?,
?;
January 7, 2001
"Scum?" I don't think any type of survival
behaviour an animal employs can be defined as "scum". Other than that,
I tend agree with you.
Madhatter, you do have a few misconceptions to clean up, firstly, I'd
like to establish that ganging up on somebody here is what I would
define as "scum" and I would certainly not agree with it, nor take
part in it. I hope you do absolve me of ganging up on you.
Secondly, I do have a reason for suggesting why Bill may be right that
the raptors may not mave been "hard hitters". The answer tends to lie
in their legs. Now, of all their equipment, its their sickle claw that
tends to transfix us to "assume" that they would have used it to very
deadily means in hunting instead. But, I would like to offically
denounce that "fact" here.
Well, if you look at the legs of many kicking birds today, you'd
notice that they tend to have extremely long tibia that are longer or
at least the same length of their femurs. The reason is this allows
their legs to draw on circular velocity to put up an incredible force
while kicking. But raptors seem to have the opposite arrangment, they
have extremely short tibia and conversely long femurs. This would have
given them great acceleration, but would have also limited their
maximum speed and their ability to kick. A modern day ostrich would
have outkicked a Deinonychus antirrhopus anytime. Which is odd,
considering that the best way for them to employ their sickle foot
claws against big animals is to kick hard and open a wound. So waht
were their claws for? Well, considering the idea that they may have
been prey for larger carnivorous dinosaurs, the claw could have been a
good deterent. The sickle claw was certainly useful for defence where
you don't have to kill your attacker
, but merely deter him from attacking, hence the non-need for a overly
powerful kick. Those claws could ahve been useful for pinning down
smaller animals in the same way that modern day raptors use their
talons to. But considering the fact that they could not have POSSIBLY
used their sickle claws in general offence tends to limit their
firepower to their claws.
Also, jumping animals also have slender and long tibia and short
femurs to optimize thier ability to leap, raptors have the opposite
limb configuration. Whatever it was, they were not jumpers nor
leapers. Their feet seemed to give them on-the-ground agility and
acceleration, not extreme seed, kicking ability nor jump capacity. So
that would have limited them to attacking with their formidibly
equipped forelimbs. Formidible, but not as deadily as once presumed.
Also, I believe the term "compairative anatomy" has been badly misused
by many paleontologists (I'm afraid even Bakker). The underlying
premise of compairative anatomy by all my zoology textbooks is "
similar in form, similar in function". A basic rule that seems to have
been ignored by many paleontologists who lump raptors with modern day
hunting cats. NO, they were NOT similar in form, nor function. If you
choose to believe them, you're going by very poor scientific methods.
The methods of hunting cats can never be linked to raptors, nor would
I aliken their niche to hunting cats. One forgets that hunting cats do
not have 6-ton superpredators to live around with. No, Madhatter, the
cat-raptor link cannot and will not hold. Besides, cats don't attack
primarily with their claws (which the raptors do) they do so with
their well adapted canines. An adaption I have yet to see in a raptor.
No, we cannot link raptors to cats, not if you want an accucrate and
correct picture of them anyway.
What makes you so sure a Velociraptor could commonly bring down a
Protoceratops anyway? Have we found evidence of predation of full
grown Protoceratops adults by Velociraptor? (No, not the combat
fossil!) No, we have not. Raptors seem to remind me of Johnny Rook, a
modern raptor that behaves more like a crow than a
falcon.
from Levine,
age 25,
?,
?,
?;
January 7, 2001
Billy, raptors were heavy hitters in the
same way cats are. Raptors could take anything from a shrew to
something 35% larger(protoceratoprs). Seeing raptors as "scum" is
simply JUST your opinion and what you wish. I dont show favoritism to
any dinosaur, I love them all equally, but my top favs are
Megalosaurus and Tyrannosaurus. Its just you fail to realize how nasty
a raptor could be, thats what I dont like. What else I dont like is
the grouping up and lack of respect for me. Just because Im new doesnt
mean I dont know anything. Raptors were not like foxes or jackals or
something in that area. They were most like cats, like cougars and
such, not to mention comparative anatomy is used by most
paleontologists and is used to help reconstruct the lives of all
dinosaurs and prehistoric animals. Raptors were very deadly animals
that were built for fast clean kills and ambush. Whether they did this
alone or in groups, we will have to wait for more evidence. The only "scum" as you call it were troodontids, carnivorous
reptiles and mammals and other small dinosaurs. I doubt iguanodon
wouldve laughed a raptor off, but watched it carefully, in the nesting
season. Now something like utahraptor wouldve been looked at
differently.
from MadHatter,
age ?,
?,
?,
?;
January 6, 2001
I differ from your view Mad Hatter, the
raptors do seem to have alot of firepower for their size, but it seems
to be more of the wrong type of firepower. For instance, you don't use
naplam on tanks. I don't think its good to compair raptors with saber
tooths as saber tooths rely more on precise application of massive
localized damage to kill. They'll be pretty useless stabbing into the
flanks of a pachyderm. If anything, the saber tooth's method of
massive localized damage to a precise point seems to resemble more
that of Tyrannosaurus than the raptors. Heavy claws? I don't think so,
Hard hitters? Unlikely. You seem to have a skewed "superman" view of
the raptors. Really, I do not think they jumped and swerved and kicked
and slashed their prey to death. In jurassic park, maybe. The raptors
seem to match more that of a small prey hunter, if you ask me, the low
down scum that plundered the nest of other dinosaurs for the helpless
young. That's a more
realistic view of the raptors. A Iguanadon would probally laugh off a
raptor attempt on its life the way an elephant laughs off
cheetahs.
from Billy Macdraw,
age 18,
?,
?,
?;
January 5, 2001
I'd like to add further clearance on my
post, what I'm trying to say is that the raptors could wound
"terribly" but they could not wound "effectively". What's the point of
giving an Iguanadon a lot of nasty gashes that will not bring him
down? To bring down a large herbivore in those times, you need the
smash-mouth tatics of Tyrannosaurus, not a series of sickle blades
used to carve repeatedly away at your target.
from Billy Macdraw,
age 18,
?,
?,
?;
January 5, 2001
The Tenontosaurus you are refering to, a
small subadult supposed to have been killed by the Deinonychus. Well,
there are signs of another larger predator doing the job for them.
Personally, that fossil also shows the wide and low density of
bitemarks associated with scavenging. Chandeler, that fossil points to
scavenging by Deinonychus, not hunting!
from Levine,
age 25,
?,
?,
?;
January 5, 2001
I share Honkie's view. As what Levine
would say, a lot of our raptor ideas lack "null intergity" they appear
to overlook alternative explinations and contradictory evidence. I
also find it rather strange when people say that it was obvious the
raptors were big prey hunters, but to all my knowledge of biology, the
raptors don't seem to hold up well as big prey hunters.
Firstly, if your prey is going to be many times your mass, you do not
have a prayer in hell of bringing it down simply by clawing and
slashing at it. You'll have to strike precisely and at a weak spot,
say a neck or something. Now, Saber-Toothed cats seemed to acomplisish
this rather well by bringing down their prey by stabbing them in the
neck with their fangs.
Now, if you ask me, raptors seem to lack the specialized equipment for
bringing down large prey, as deadily as they might seem. They don't
have any stabbing equipment or such. What they do have is slashing
equipment. Which is ill-suited for killing big prey. Slashing
repeatedly at a 5-ton herbivore will hardly bring it down. You need to
apply a massive amount of damage to one area, which the raptors cannot
do, even in numbers. Giving a herbivore a shallow gash will not do to
kill it.
All in all, if I look at the raptor body plan, it seems anything BUT a
hunter of big prey. It's easier to imagine raptors been drawn like
flies to a stinking carcass of a 5-ton herbivore killed earlier by a
larger dinosaur than to imagine them actually trying in their opuny
ways to kill it. But what do you know, 70 millions years later, some
overzealous paleontologist digs all this up and assumes that it was
the raptors who did the job. What if we one day found a fossil of a
gigantic sauropod with raptor bite marks on it, would we arrive at the
same idea that the raptors killed it? I didn't think so. So yes, it
seems to go against evidence and logic that the raptors were big prey
hunters.
from Billy Macdraw,
age 18,
?,
?,
?;
January 5, 2001
I understand Chandeler, but what surprises
me is why we say that that must have BEEN evidence of an attack. That
could also have been scavenging of a already dead Tenontosaurus. What
that could really consluvely prove pradatory behaviour is evidence of
a miss or a failed attack. Now, we know that the raptors certainly did
not have a 100 percent sucess rate in hunting, so given the 35 million
years they've been around, we should be able to find alot of evidence
of failed attacks on their supposed prey. What confuses me is why we
find more evidence of attacks on large animals from T.Rex, a single
species of Tyrannosaurid that has only been around for 5 million
years. It amazes me when we say that finding shed teeth associated
with the remains of an animal MUST have been evidence of an attack.
Unhealed bite marks and shed teeth are hardly good evidence on thier
own, we need more.
Maybe one day some person who stumbles across an elephant carcass with
bite marks from a group of jackals, I wonder if he was going by the
same logic, would he conclude that the jackals bought down the
elephant? I hope you see my point. I don't want equivocal evidence --
not supporting or rejecting our hypotheses, I want somethiong more
"solid."
To my knowledge there has been no such evidence, could you enlighten
me?
from Honkie Tong,
age 16,
?,
?,
?;
January 5, 2001
Honkie about your reply to my
_Tenontosaurus_ v. _Deinonychus_ post...
The fossil evidence I was talking about did show injury marks to the
_Tenontosaurus_ and ONLY teeth were discovered, no _Deinonychus_
skeletons. That means the predators only lost teeth during the
attack, and perhaps not their lives. I'm not saying that
_Deinonychus_ always hunted this way or anything like that, I'm only
giving facts. _Tenontosaurus_ skeletons have been discovered with
other dead _Deinonychus_, so maybe both sides of the argument are
correct.
from Chandler,
age ?,
?,
?,
?;
January 5, 2001
Honkie about your reply to my
_Tenontosaurus_ v. _Deinonychus_ post...
The fossil evidence I was talking about did show injury marks to the
_Tenontosaurus_ and ONLY teeth were discovered, no _Deinonychus_
skeletons. That means the predators only lost teeth during the
attack, and perhaps not their lives. I'm not saying that
_Deinonychus_ always hunted this way or anything like that, I'm only
giving facts. _Tenontosaurus_ skeletons have been discovered with
other dead _Deinonychus_, so maybe both sides of the argument are
correct.
from Chandler,
age ?,
?,
?,
?;
January 5, 2001
Sorry Mad Hatter, but I don't buy that
suggestion. Well, T.Rex was probally at the top of its food chain
anywhere it went. And I certainly think it would be pretty stupid not
to eat any carrion if it came across it. Another thing, what I do find
puzzling is that most people assume that the raptors do not scavenge,
which I find odd. If you ask me, raptors probally scavenged as much as
T.Rex. About T.Imperator, I'd prefer to put it under "Tyrannosaurid"
we're still not sure if it was a rex or another subspecies.
"Imperator" came from a place well know for extra-sized rexes, so
there is a probability it might be T.Rex. The problem with imperator
was that its pretty well buried. But currently, Horner has found and
is currently excavating 5 comfirmed T.Rex specimens that are
"Imperator" sized. So I figure there is a probability that T.Imperator
might be a T.Rex.
About the raptors taking down big prey once again, I hardly find a
strong case for it. We can't deduce what the raptor ate just by
looking at the skeleton, that's indirect. What I'm looking for is
evidence of failed attacks on large prey. A lodged tooth in a hip or
something. This is odd, considering that the raptors have been around
much longer than T.Rex, we should have found more evidence of failed
attacks than we do in T.Rex. So far, no signs of failed attacks by
raptors have been found. So you can see why the big prey argument is
wearing thin. About Tyrannosaurus being a hunter, well, I was
intrugied by Leonard's description of a defensive bite, the damaged
Edmontodsaur tail and best, a T.Rex tooth fragment stinking out of a
Edmontosaur hip. I guess this pretty much proves T.Rex as much a
hunter/scavenger today as the modern day lion.
Now, lets look at the smaller raptors, the Velociraptors, I figure
many people tell you that Protoceratops was pretty much common prey
for Velociraptor, but once again, evidence of healed failed attacks is
totally absent. Before you mention that Protoceratops VS Velociraptor
fossil, one must note that we are looking for predation, not fights to
the death. Now, not finding any evidence of Velociraptor preying on
Protoceratops (which is about 4 times their mass) proves pretty
conclusively that Velociraptor did not take on prey bigger than
themselves, why? Because Protoceratops fossils are extremely common.
Had they been common prey to Velociraptor, we would have found plenty
of healed attacks by now.
What we do find is evidence that Velociraptor was preying on the
Protoceratops young, we do have evidence of Velociraptor plundering
Protoceratops nests. So this proves pretty well that Velociraptors
were not big prey hunters?
How does this carry onto bigger raptors? Well, it does. Considering
the fact that the bigger raptors (safe for Utaraptors) were not too
much bigger, and bringing down prey which is 300 times their mass,
inspires a streach of the imagination. If a Velociraptor does not prey
on a Protoceratops just four times its size, would a bigger raptor
manage a herbivore 300 tiems its size? The herbivores were by n