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

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 ...

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 ...

"I'm stunned." says Per Ahlberg of Uppsala University, who coordinated the study; "A single track-bearing slab, which one person can lift, calls into question everything we thought we knew about when ...