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

Scientists working in Ethiopia's Afar Region have made discoveries that rewrite our understanding of early human history. For ...

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 ...

The missing link in the mystery turned out to be an event called the Cambrian explosion. It was only after it that living ...