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 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 ...

Long before the carnage began, the Cretaceous picked up where the Jurassic ... snakelike mosasaurs. Rays and modern sharks became common. Sea urchins and sea stars (starfish) thrived; coral ...

Paleontologists recently discovered a rare mammal fossil in western Colorado. It's a genus of mammal that lived between 70 ...

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

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 University of Colorado team behind the discovery has been digging just outside of Rangely, Colorado for 15 years and ...

Crocodilian ancestors known as thallatosuchians roamed the middle Jurassic and early Cretaceous eras (roughly 191-113 million years ago) and comprised two primary groups, teleosauridae and ...

Thankfully, Colorado preserves it well, and this is where a team of scientists retrieved fossil evidence of a Late Cretaceous “swamp dweller”. The fossil remains included a jawbone and three ...

The merest hint of Atlantis' former glory is now left as the gemlike Seychelles islands, the Atlanteans replaced by corals, sharks ... dinosaurs at the end of the Cretaceous Period about 65 ...

A team of paleontologists have discovered a fossil in northwestern Colorado that reveals a new kind of mammal that lived ...