This week, discover the Sahara’s greener past, explore a mysterious cosmological force, marvel at a new concept for space ...

The Sahara Desert is one of Earth's most arid and desolate places, stretching across a swathe of North Africa that spans ...

The Sahara Desert, located in West Africa, is the largest hot desert in the world. While deserts are traditionally characterized by a dry climate with low levels of vegetation, the Sahara has been ...