CRETOXYRHINA WAS A GIANT SHARK, ONE OF THE BIGGEST PREDATORS IN THE MESOZOIC SEAS, GIANT SHARK, ONE OF THE BIGGEST PREDATORS IN THE MESOZOIC SEAS, AND IT LOOKS A LOT LIKE TODAY'S PREDATORS IN THE ...

Earlier research published in 2018 found that a Cretaceous shark called Cretoxyrhina mantelli (pictured above) was large enough to eat a pterosaur.

Cretoxyrhina was one of the largest sharks and a formidable predator in the Late Cretaceous seas. Nicknamed the Ginsu shark after the kitchen knife that slices and dices, Cretoxyrhina ripped apart ...

The large, approximately 21 foot long shark Cretoxyrhina was the best match, especially because tooth fragments of this shark have been found embedded inside other bones showing similar bite marks.

The extinct shark is often imagined as a supersized great white measuring up to 50 feet long. Now scientists argue megalodon was slimmer, and perhaps even longer.

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.

Like all sharks and the related skates and rays, Aquilolamna had a cartilaginous skeleton. It had the familiar torpedo-shaped body and tail of a shark, but its pectoral fins were utterly unique.

Dr. Scott explains that parts of the United States used to be covered by water.