with a difference in temperatures between day and night that’s almost unbelievable. The Sahara Desert is the largest hot desert on Earth and covers over 3.3 million square miles of North Africa ...

W henever we think of the Sahara Desert, the images that come to mind are vast stretches of sand and extreme dryness. But do you know that the desert was not always this arid and ...

The desert covers over 3.3 million square miles, which means it's roughly the same size as the entire United States.