This video explores how oases form and why they become islands of life in some of the driest places on Earth. Using examples from the Sahara Desert, including the ancient Siwa Oasis, the video ...

Add Yahoo as a preferred source to see more of our stories on Google. The dunes of the Sahara were whitened by a layer of snow on Wednesday, March 11, video from Ain Sefra in north Algeria shows. This ...