During the Cretaceous Period, a genus of sharks roamed the sea with rows of unusual teeth. Mostly large and rounded, these chompers were not meant to slice through their prey, but to grind and crush ...

Some 80 million years ago, the late Cretaceous oceans were patrolled by 17-meter mosasaurs, long-necked plesiosaurs, and massive, predatory sharks. For decades, the paleontological consensus was that ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. The fossil of a huge great white shark relative that lived among the ...

The fossil shark Ptychodus was first identified 190 years ago, but in the intervening centuries of paleontological inquiry, a comprehensive look at the ancient fish has been hard to come by. Until now ...

Whale sharks, Rhincodon typus, are the largest fish in the world. They can trace their ancestry to the Jurassic and Cretaceous periods, 245–65 million years ago, and are members of the ...

More than 100 million years ago, scientists say, warming seas and reduced oxygen may have sent some sharks higher into the water column, where they evolved to be fierce and hungry. By Jeanne Timmons ...

Ancient relative of the great white shark Most species of Ptychodus lived between 100 and 80 million years ago during the late Cretaceous period. The deposits in which the fossils were discovered — in ...