The Sahara once bloomed

After the Ice Ages, the desert turned green and people returned. Rock art at Tassili n'Ajjer shows a lush Sahara 10 millennia ago.

Africa: When the Sahara Was Green

Then the sky changed

Around 3500 BC, a tilt in Earth’s orbit drove a climate flip. Sand surged in a period of rapid desertification.

Africa: When the Sahara Was Green

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