NASA Image Reveals Remnant Of Vast Ancient Lake In The Sahara

Thousands of years ago, the Sahara desert was a lush and verdant place more akin to a savannah, where giraffes, hippos, and crocodiles roamed, farmers let their dairy herds graze, and people ate a lot of fish. A vast lake – bigger than the Caspian Sea, the world’s biggest lake today – resided in Central Africa, sprawling 400,000 square kilometers (150,000 square miles), earning it the moniker...