Huge tunnels under southern Brazil and northern Argentina were potentially made by giant, Ice Age sloths for refuge and rest ...

Indigenous Australians may have been fossil collectors, not hunters that drove megafauna to extinction, new research suggests. For more than 40 years, cuts in the lower leg bone of a now-extinct giant ...

Deep beneath the hillsides and suburbs of Brazil, there are tunnels so vast and regular that they look like abandoned subway ...

Australia’s First Peoples were more early paleontologists than extinction-driving butchers, a group of scientists argue. For decades, the debate over whether the first humans to inhabit present-day ...

The first known hand fossils from an extinct human relative have been unearthed in Kenya, revealing a species with unexpected dexterity and a gorilla-like grip. The hand bones, which were discovered ...

Humans have wiped out hundreds of species — with many more on the brink or experiencing large declines in population. Some scientists have argued that we have entered a “sixth mass extinction” event ...