1.4 Million-Year-Old Hand Bone 'Closes The Gap' In Human Hand Evolution

A 1.42 million-year-old metacarpal (a bone of the hand) belonging to Homo erectus was recently found in Kenya. This discovery adds significant clarity to the evolution of modern human hands, which happened 600,000 years earlier than previously thought.

Source: http://www.bbc.co.uk/news/health-25398642