By Will Dunham July 23 (Reuters) - Snakes first appeared during the age of dinosaurs, but fossils of many early species are ...

A remarkable fossil of the Cretaceous-period snake Tametara mirim in Brazil unveils new insights into snake evolution.

Herbivorous dinosaurs, rather than just post-extinction mammals, were likely the universe's first major fruit-eaters and seed ...

An international team of scientists, including researchers from Germany and the UK, have described a new species of ancient marine crocodile, Enalioetes schroederi. Enalioetes lived in the shallow ...

"These krakens must have been a fearsome sight to behold." Scientists just classified an enormous octopus that likely ruled ...

Nearly 66 million years ago, a large asteroid hit Earth and contributed to the global extinction of dinosaurs, allowing the rise of mammals and leaving birds as their only living descendants.

An 18-foot-long sea monster ruled the ancient ocean that once covered Kansas A newly described species of mosasaur, an extinct marine reptile, swam through Cretaceous seas 80 million years ago and had ...

Sixty-six million years ago, at the end of the Cretaceous Period, an asteroid impact near the Yucat n Peninsula of Mexico triggered the extinction of all known non-bird dinosaurs. But for the early ...

A new study finds that one of the hottest periods in Earth's history may have driven lampreys apart -- genetically speaking. The work could have implications for how aquatic species respond to our ...

Artwork of a pair of tyrannosaur dinosaurs surveying a volcanic landscape. This depicts a scene at the end of the Cretaceous period in Earths history. A massive meteorite has impacted the Earth, ...

Around 66 million years ago, springtime in the Northern Hemisphere brought disaster and mass death to Earth in the form of a giant asteroid impact that triggered a global extinction. 164 ...