When it wasn't putting T. rex to shame, the dinosaur Spinosaurus spent its time swimming - and chowing down on sharks. Until now, scientists didn't have any proof that there were swimming dinosaurs.

There once was a place on Earth so overrun with giant, meat-eating predators that even a Tyrannosaurus rex would have been nervous. One predator there was even bigger than T. rex, and scientists now ...

Add Yahoo as a preferred source to see more of our stories on Google. Despite what's depicted in movies and books, the real Tyrannosaurus rex was likely an awkward swimmer at best. Illustration by ...

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