This is the map of Africa. If you look to the South, you will see lush vegetation, with lots of greenery. However, when you go north, things are different. Covering multiple countries, it is the most gigantic desert globally, with miles and miles of dune formation. Altogether, the Sahara Desert covers 9 million square kilometers, meaning it will swallow Spain 18 times! However, did you know that this vast stretch of sterile sand covering a third of the African continent was covered in lush vegetation thousands of years ago? What happened to the Sahara? And what is happening to it right now? In this video, we look at the terrifying discoveries scientists made under the Sahara desert!