Millions of years later, fossilized remains are now revealing the story of a giant, clawed dinosaur that once dominated the ...

This unique anatomy inspired its scientific name, named Duonychus tsogtbaatari ... is now Asia and North America during the ...

Still, many known theropods had big legs, short arms, and stout, long tails—hardly the anatomy one would expect on a creature leaping from trees. Other paleontologists argued that birds did not ...

Modern birds, along with certain snakes and fishes, have skulls whose jaws and palates are not firmly fixed in place.