Some sharks got faster and bigger after lava-induced global warming in the Cretaceous. Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent every weekday.

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 ...

Above: an artist's reconstruction of the end-Cretaceous mass extinction event and an inset of a 3D-rendered goblin shark. These sharks are one of the most ancient of the species that are still ...

The peak of Cretaceous ocean surface temperature at about 83 degrees Fahrenheit might have affected shark speed. (For comparison, today’s average is 68 degrees.) ...

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 ...

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 ...

An almost complete skeleton of a Cretaceous shark has been uncovered in Mexico. The find sheds light on what the prehistoric relative of the great white looked like.

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 ...

(CNN) — 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 ...