Message in a dinosaur's teeth

Giant dino that was T. rex rival may have spent most of its time in the water

By Stephen Ornes, 00:00 AM March 2, 2010

Spinosaurs were large, meat-eating dinosaurs whose fossilized remains are often found in the same areas as the bones of tyrannosaurs (such as Tyrannosaurus rex). Fans of the movie Jurassic Park III may remember the spinosaur as the cranky dinosaur — the one with a sail-shaped fin on its back — that destroyed an airplane, ate a few people and took down a T. rex.

Paleontologists have wondered how such giants as spinosaurs and tyrannosaurs, both meat-eating and ferocious, could live in the sam...

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