What is under the sand in the Sahara Desert?

Beneath the sands of the Sahara Desert scientists have discovered evidence of a prehistoric megalake. ... read more

Beneath the sands of the Sahara Desert scientists have discovered evidence of a prehistoric megalake. Formed some 250,000 years ago when the Nile River pushed through a low channel near Wadi Tushka, it flooded the eastern Sahara, creating a lake that at its highest level covered more than 42,000 square miles. read more

The Sahara might be famous for its sandy dunes but, in fact, only 20% of it is sand, the rest of it is mostly made up of bare rock. The largest sandy desert is the Rub’ al Khali (literally ’empty quarter’ in Arabic) situated in the middle of the Saudi Peninsula. read more