The newly described mosasaur Tylosaurus rex spanned up to 43 feet (13 meters) long and may have been one of the fiercest ...

The evolution of tiny arms in several groups of meat-eating dinosaurs was likely driven by the development of strong, ...

A massive new dinosaur discovered in Thailand may have been one of the last giant sauropods to roam Southeast Asia. The ...

A spectacular dinosaur discovery in Spain is giving scientists a rare new look inside the world of stegosaurs.

Researchers at SMU and the Perot Museum have identified a new species of mosasaur, a 'T. rex of the sea' that lived alongside ...

Scientists have uncovered evidence that the vanished Tethys Ocean may have sculpted Central Asia’s mountainous landscape ...

Scientists discovered three new mammal species that survived in Alaska’s ancient Arctic during the age of dinosaurs.

The asteroid that smacked into our planet about 66 million years ago at the Cretaceous-Paleogene (K/Pg) boundary may have been bad news for dinosaurs, but it was good news for fungi. According to new ...

The top predator prowling the seas during the age of the dinosaurs 100 million years ago may have been the octopus.

A giant dinosaur fossil discovered in New Mexico is adding fresh evidence to a long-running debate about the origins of the ...