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

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 ...

About two decades ago, African nations launched an audacious plan: a 7,700km “Great Green Wall” to hold back the Sahara Desert’s southward march. Yet years passed and progress was stalled ...

700km "Great Green Wall" to hold back the Sahara Desert's southward march. Yet years passed and progress was stalled after being plagued by funding shortages, political instability and a lack of ...