For the first time, scientists have resurrected a piece of DNA from an extinct animal — the Tasmanian tiger. The researchers engineered mice with a piece of the long-gone marsupial's DNA that turns on a collagen gene in cartilage-producing cells.

A controversial fossil analysis finds that the skulls of Neandertals and humans grew in markedly different ways.

A new analysis of fossils and living animals suggests that most dinosaurs' nostrils occurred at locations toward the tip of their snout rather than farther up on their face, a concept that may change scientists' views of the animals' physiology and behavior.

Mites fossilized in cave formations in the American Southwest show that at times during the past 3,200 years the climate there was much wetter and cooler.

A sleek predator and a pot-bellied giant dinosaur have emerged from North American rocks to fill in a 30-million-year gap in the dinosaur fossil record.

Excavations near an Egyptian oasis have unearthed the fossils of an animal that probably ranks as the second-most-massive dinosaur known.

Trace fossils found in a vacant lot in a small town in Utah, including the footprints of meat-eating dinosaurs, could soon be protected as part of a new U.S. national monument.