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

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

And on all sides, the air is alive with the songs of desert birds. The deserts of the Southwest provide excellent birding. These arid lands support a rich variety of birds, including some birds that ...