Top ten archaeological discoveries

Olduvai Gorge
Olduvai Gorge, Tanzania

This 30-mile section of Tanzania's Rift Valley is responsible for much of what we know about the evolution of hominins and eventual existence of our species. Fossil remains found in Olduvai Gorge show that precursor human species date as far back as 1.9 million years ago.

They also show how we've increased in social and cognitive complexity through stone tool use and a hunter-gatherer lifestyle. Tools and animal remains found in a central area indicated developing social interaction and these phenomena are seen in increasing fashion in the more recent remains. Our species, homo sapiens, are thought to have occupied the site from around 17,000 years ago.
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