NASA Captures Remnants of 'Mega Chad,' an Ancient Lake in the Sahara Desert

Lake Mega Chad used to be Earth's biggest freshwater lake. It was larger than the Caspian Sea, the biggest lake on Earth today, and you can still see evidence of the 7,000-year-old lake's former shorelines.
Published: 12:44 PM EST February 17, 2020
Updated: 11:50 AM EST February 17, 2020