A new study theorizes that evolution ticks at different speeds, especially when a big group of organisms first appears.

Add Yahoo as a preferred source to see more of our stories on Google. A digital reconstruction of a million-year-old skull suggests humans may have diverged from our ancient ancestors 400,000 years ...

An ancient skull unearthed in China’s Hubei Province may push back the emergence of the human species by 400,000 years Researchers believe a skull unearthed in 1990 suggests the emergence of the human ...

For decades, the asteroid that ended the reign of the dinosaurs has stood as a symbol of total planetary devastation. But ...

A badly crushed cranium unearthed decades ago from a riverbank in central China that once defied classification is now shaking up the human family tree, according to a new analysis.Related video above ...