Scientists have explored how changes in sea surface temperatures during the Cretaceous influenced the diversification and ...

Exquisitely preserved fossils of a shark that thrived during the Cretaceous period appear to solve a long-standing mystery around how it hunted and where it fits into the shark evolutionary tree.

At that point, during the Cretaceous period, sharks were bottom dwellers, living in the depths of the ocean. But a massive outpouring of volcanic lava sent carbon dioxide levels soaring, ...

At the beginning of the Cretaceous Period (145 million to 66 million years ago) sharks were once again widely common and varied in the ancient seas, before experiencing their fifth mass extinction ...

"You never know unless you look," said Jayson Kowinsky, a high school physics teacher from Pittsburgh who, while sifting ...

Newly discovered birds from Late Cretaceous North America were hawk-sized and had powerful raptor-like feet, according to a new study. Newly discovered birds from Late Cretaceous North America ...