Add Yahoo as a preferred source to see more of our stories on Google. A rare fossil of Joaquinraptor casali from Patagonia reveals a powerful predator that may have dined on crocodiles. (CREDIT: The ...

Certain species of wasps and frogs share a pain and inflammation peptide similar to one found in vertebrates to help defend against predators—a discovery that contributes to a shifting view of how ...

A tiny 242-million-year-old fossil from Devon is shaking up scientists’ assumptions about the earliest members of the lizard lineage. Instead of the expected skull hinges and palate teeth typical of ...