Archaeologists working in the Shangchen region of China have uncovered dozens of stone tools, the oldest of which date back 2.1 million years, making them the earliest known evidence of a human presence outside of Africa.
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Our species made its debut some 300,000 years ago. During the preceding millenniums, our continent of origin underwent environmental shifts that very likely influenced the trajectory of human evolution. Archaeologists working in Kenya have uncovered new clues to support this assertion, showing the surprising extent to which climate change influenced the behaviour of early humans and their approach to technology.