Sahara desert contained the world’s largest lake named Mega Chad, scientists

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MALI: The Sahara, known to be the world’s largest desert, used to be home to the largest freshwater lake in the world.
Lake Chad is key to finding out more about what used to be the world’s largest freshwater lake, Mega-Chad, since Lake Chad is now only a remaining fraction of it.
Researchers from Royal Holloway, Birkbeck and Kings College, University of London confirm this in a study published in the Proceedings of the National Academy of Science of the United States of America.
Some 700 million people depend on Lake Chad for water, but this lake is now just a tiny part of a larger body of water, Paleolake Mega-Chad. The 137-square-mile Lake Chad was only a fraction of the 139,000-square-mile Mega-Chad. Even combining together the five Great Lakes of North America will not equate to what used to be the largest lake in the world.
By examining the borders of Lake Chad, the researchers found evidence of a significant change in climate over the past 6,000 years. Mega-Chad had possibly shrunk from drying out.