Nicknamed the Ginsu shark after the kitchen knife that slices and dices, Cretoxyrhina ripped apart prey with a mouth full of razor-sharp, bone-shearing teeth. Evidence suggests Cretoxyrhina fed on ...

Cretoxyrhina. These sharks lived all around the world until about 80 million years ago. They competed with pliosaurs and ...

And so there was a shark-- Cretoxyrhina is its name-- it kind of rivaled-- later on in geologic time, the megalodon comes in. That's a really, really big shark that lived 40 million years ago.

It was found along with more than 750 other fossilised teeth in a shark graveyard at the bottom of the Indian Ocean. 'The teeth look to come from modern sharks, such as mako and white sharks, but ...

An illustration of an ancient shark called Cretoxyrhina attacking a pterosaur called Pteranodon. Artwork by Mark P. Witton/Hone et. al. 2018/CC BY 4.0 Get the Popular Science daily newsletter💡 ...

It's the best time of year to find shark teeth and although Palm Beach County may not be world-ranked in shark tooth hunting, like Venice Beach, the Palm Beaches have some of the best shark tooth ...