Cool!

Prehistoric humans roamed the world's largest desert for some 5,000 years, archaeologists have revealed.

...far from the inhospitable climate of today, the area was once semi-humid.

Between about 14,000 and 13,000 years ago, the area was very dry. But a drastic switch in environmental conditions some 10,500 years ago brought rain and monsoon-like conditions.

Nomadic human settlers moved in from the south, taking up residence beside rivers and lakes. They were hunter-gatherers at first, living off plants and wild game.

Eventually they became more settled, domesticating cattle for the first time, and making intricate pottery.

...

Humid conditions prevailed until about 6,000 years ago, when the Sahara abruptly dried out. There was then a gradual exodus of people to the Nile Valley and other parts of the African continent.