New research suggests early dinosaurs laid eggs with soft shells, and mosasaurs—gigantic marine reptiles—did so, too, laying soft-shelled eggs of massive proportions. Birds and crocodiles lay eggs ...

LONDON — What began with routine maintenance at a British nature reserve and reservoir has been hailed as a giant Jurassic "mega-find." Officials at Anglian Water and the Leicestershire and Rutland ...

A vast floodplain 10 times the size of the Amazon delta existed during the early days of the dinosaurs. It is the largest known delta from Earth’s history and may have been a crucial habitat. During ...

Giant mosasaurs, once thought to be strictly ocean-dwelling predators, may have spent their final chapter prowling freshwater rivers alongside dinosaurs and crocodiles. A massive tooth found in North ...

Nobody had ever found a specimen like Borealopelta before. Paleontologists have been studying nodosaurs since the 1830s, but nobody had ever found a specimen like Borealopelta before. The key to its ...

The evolution of new dinosaur species may have surged due to the rise of the Rocky Mountains and the emergence of a prehistoric inner sea in North America, researchers say. Duck-billed and horned ...