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Originally posted by phantompatriot
ive also seen the show. the sharp teeth make you think he is one nasty monster. but the thing is comparison of his thigh and leg bone show he would be very slow and his stubby short arms would make it hard to get up if he fell.so i would say he would attack slow prey but other than that he was a wimp.
Originally posted by taibunsuu
There are many stereotypes about dinosaurs and no doubt some of the facts we've established are based on conjecture and are untrue, but the case of T-rex being a pure carrion eater seems so ridiculous that it sounds like a originator of the idea is simply trying to make a wild case for some recognition.
Explaining how he came to challenge many long-held beliefs, Horner says, "Rethinking how we do science, and thinking about science as a process rather than a body of knowledge is very important.
Originally posted by ShadowXIX
Bug Einme Thanks for a very informative reply I love to learn about dinosaurs as a hobby its been a life long love for me. Its great to get feedback from a real paleontologists, It reminds me how much of a novice I really am.
As for the feathers on T-rex its hard to get over the preconcived picture we have of Rex. I tend to think that if T-rex did indeed have feathers that they would not extend all the way to his head. I think it would be likely to have a feather pattern like a vulture, a bald head and a feathered body. Since I think the T-rex was a messy eater having your feathers get all bloodly would not be ideal and a pain for it to clean. I could be wrong about this and I have no proof but It just seems right to me.
Originally posted by Bug Einme
Hello, I am a Paleontologist who works for Morrison Natural History Museum, I stumbled on this topic and thought I would give my two cents.
First off T.rex was most definently capable (and did) hunt its own food.
The evidence of Leg proportions is incorrect. True, the proportions were not that of an animal that is a long distance runner (a horse), but closer to another animal (rhino). The big question when looking at the legs is the muscle attachments (you can see muscle scars where the muscle attaches to bone) T. rex has HUGE attachments very similar to a rhino. Incidently rhinos may run faster than horses, but not for as long. Also recent discoveries from the Black Hills Institute, have shown a complete stride of T.rex with the Toes dug in (ie deeper) indicating the animal was running. Calculations show it would be moving at 45mph.
The large olfactory sense in the brain is also biased. Most animals, including sharks, dogs, lions, hyenas, etc. have excellent senses of smell and use them to help them navigate large distances. Why shouldn't it be the same for dinosaurs. When you weigh 5 tons, you need to find your next meal fast.
T.rex had a brain the size of a bannana, which relative to its body size isn't great, but good enough. They relied on instinct, however a close relative of rex, Troodon (looked very much like a velociraptor, real one not like JP[ironically closer related to T.rex than the "raptors"]), is the smartest dinosaur (similar proportion as an ostrich).
In regards to pack behavior, there is mounting evidence that at times they would form small packs (probably as the young are getting ready to leave the group). Phillip Currie recently rediscovered a bone bed showing about 5-6 albertosaurs (VERY close relative of rex, only a tiny bit smaller) died together in a flash flood. Not a trap. Also Sue's broken leg healed, hard to catch food, or even move to a dead carcass with a broken leg. This implies another animal helped get food.
As far a rex standing up straight. It could have if it wanted to, no bones would have broke. Iguanodon was the animal that needed its tail broken, that is due to ossified tendons called myomers. the evidence we have that it carried itself the way we now think of it, is no tail drag marks in the tracks, and its weight is further back on its foot than we originally thought.
As far as balance, Theropods actually have the best design for a bipedal animal that ever evolved. it is exceptionally well balanced, look at ostriches and emus. Humans on the other hand have a horrible design (we wear out after 30 years, bad knees bad back, etc.). Our design fights gravity, theropods used gravity to their advantage.
As far as things we won't learn:
T. Rex wsan't like a chameleon, it actually had feathers (yes, rex was fluffy). we see this based on the size of small openings for blood vessels and nerve endings called foramen, they are huge on rex's skull.
T.rex wasn't venomous, he didn't have the right teeth for it. Venom is injected through hollow teeth, all of rex's teeth were solid.
Finally theropods (including dilophosaurus) could Never ever spit. They didn't have the lips for it. based on foramen we have distinguished that rex and other theropods have lips like a croc. Prehensile lips are necessary to spit (like us, or a camel). We build up pressure behind our lips and *ptooey* we spit. They couldn't build up the pressure. BTW "spitting" cobras don't really spit either, they just have a squirt gun like venom sack (which is far more interesting). Though sauropods may have been able to.
WE actually do find soft body fossils, though very rare (in fact we had FOUR mummy dinosaurs. only 2 now, the other two are at the bottom of the atlantic, sunk during WWII.) Animals with cartelage can't live on dry land, not enough support, so they die under water and if the conditions are just right we do get soft body fossils, including squid (very cool to look at) and jellyfish (sadly disappointing).
As far as Horner, he has done interesting stuff but you have attributed too much to him.
Bakker proposed the warm blooded metablosim in the 60s, before Horner.
Grant was a composite character of Horner and Bakker (though if you read the books he is more like Bob, which really makes since when you meet them).
the T.rex in question was found by Sue Hendrickson and Peter Larson with the Black Hills institute. Horner has found parts of one, but it was far from complete.
Finally, Horner seriously hates T.rex. No joke. You get to talking with him and he will swear about rex. I think this whole argument is an attempt at character assasination.
IMHO: T. rex was both, mainly because that is what we see today. Once you get big enough, you don't have to hunt for your food. However, T.rex was definently something that could have hunted its entire life, unless illness or injury prevented it.