Fresh findings about arm and leg bones advance the debate over whether Sahelanthropus tchadensis was bipedal, but not everyone is convinced

A group of anthropologists’ new analysis offers powerful evidence that Sahelanthropus tchadensis—a species discovered

Fossilized bones and teeth dating to 773,000 years ago are providing a deeper understanding of the emergence of Homo sapiens.

A near complete skull fossil found in Antarctica has revealed the oldest known modern bird — a mallard duck-size creature related to the waterfowl that live by lakes and oceans today, a new study has found. The 68 million-year-old fossil belongs to an ...

In recent decades, scientists have debated whether a seven-million-year-old fossil was bipedal—a trait that would make it the oldest human ancestor. A new analysis by a team of anthropologists o

Scientists have unearthed in Mongolia the oldest and most complete fossil of a pachycephalosaur, a group of dinosaurs known for their dome-shaped skulls, according to a new study published Wednesday in the journal Nature. The fossil, which dates to 108 to ...

Therapsids, the ancient relatives of mammals, once roamed Earth in great numbers during the middle to late Permian period. These land-dwelling creatures would later evolve into mammals, but their earliest history has long remained unclear. A striking ...

A newly discovered "hell ant" fossil may be the oldest ant ever found, scientists say. This fossilized insect was unearthed in what is now northeastern Brazil and lived around 113 million years ago, during the Cretaceous period (145 million to 66 million ...