History

New study:

From ~9500 to 5000 years ago "extreme climate variations" sustained a green Sahara with tropical trees, grasslands, and lakes with depths up to 300 m high.

Then, ~5000 years ago, the Sahara abruptly (centuries) became hyperarid and lifeless.https://t.co/c9jUCitrBL pic.twitter.com/i9ISlDFKb8

— Kenneth Richard (@Kenneth72712993) June 29, 2023