Ancient tools found in India tell a new story of when humans migrated from Africa

The Acheulian hand axe, a signature item of technology in hominins.

(CNN)Thousands of stone tools dating back as far as 385,000 years that have been uncovered in India suggest humans might have migrated from Africa much earlier than previously thought.

Until now, many researchers believed that ancient tool-making technology -- chipping off sharp-edged pieces of stone from larger rocks to make primitive axes, knives and cleavers -- came to India between 140,000 and 90,000 years ago.