The Sahara Desert Used to be....Green?!

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Help students think about the impacts of climate change by examining a surprising development—the Sahara Desert was once, well, not a desert!

Not that long ago, the Sahara was home to early humans, lakes, and diverse wildlife. So, how did it become the largest hot desert in the world? Explore the natural and human-made causes of these changes to see if there are lessons to be learned for our future.

01:10 What are the different features of the Sahara Desert today?
02:05 What do ancient petroglyphs and fossils tell us about the climate and landscape of the Sahara region before it became a desert?
03:26 How long of a period was the Sahara region greener and wetter than today?
05:17 How might an increase in pastoralism have caused the climate of the Sahara region to become drier?
06:36 Where did many early humans migrate around 7,000 to 5,000 years ago after the Sahara became a desert?

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