Sahara desert was once a tropical rainforest
Sahara desert once was a tropical rainforest. The Sahara desert which is the hottest desert in the world right now was once a tropical rainforest, yes studies say that about 6000 years ago Sahara was a tropical rainforest covered with Greenland all over, with plenty of rainfall. but according to studies due to the rise in solar radiation, it turned into the hottest desert of the world right now.