A brachiosaur tooth found in South Korean sediments represents the first evidence that this huge, plant-eating dinosaur once roamed Asia, say the researchers who dug up the tooth. Brachiosaur teeth ...

LOS ANGELES — Scientists have unearthed what they say is the first direct evidence that Tyrannosaurus rex hunted its prey, further supporting its reign at the top of the Cretaceous food chain. The ...

The Tyrannosaurus rex of “Jurassic Park” fame chases any prey that moves, then devours it with a bone-crushing gnash of its enormous jaws and serrated teeth. But paleontologists don’t necessarily back ...

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Appearances can be deceiving. An ancient marine reptile that swam the seas long before the time of the dinosaurs sported a distinctive hammerhead jaw, along with two intimidating groups of teeth – ...