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I have attached a diagram of a Velociraptor Mongoliensis's skull, along with speculative muscle structure. It's not like those fat-faced T-rex illustrations in Charles R. Knight's paintings from the 1880's.
It's....
BETTER.
The majority of muscle structure is in the jaw and around the orbits, since the bones of the skull were thick and strong and the orbits were weak.
(BEAT THAT I SAY!)
(BTW, do we have anyone on the forums who's good with dinosaurs?
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A bit of info about muscles: A single muscle can only contract, not strech. It requires a group of muscles to be able to reuse one. intresting, isn't it?
Knowing that, look again at the jaw muscles. The mouth open, we can be quite sure hat those muscle strings are for closing the jaw. There are lots. But can you see any for opening them again? No? I didn't think so. There must be some that we can't see, but what I'm stressing is that the jaw opening muscles are weaker than jaw closing muscles.
A good example of these are crocodiles (Not aligators - I'm talking about the Steve Irwin bemoths that inhabit australia). Those jaws can snap bones in one crunch, but if you sit on them you won't be dinner for a crockodile, because of it's relatively weak jaw opening muscles.
I'm rambling again. Just some usefull info if you ever get attacked by a crokodile.