Fossil egg found in Antarctica suggests marine reptiles laid eggs, challenging previous beliefs about ancient life.

High in the Sierra del Merendón mountains in Honduras, a jaguar has been photographed at 2,200 meters, or about 7,200 feet — ...

The massive invertebrates may have been top predators, according to an analysis of their fossilized jaws. The work suggests ...

A newly discovered prehistoric mammal may hold clues to how life survived the dinosaur-killing extinction. The tiny species, ...