By the end of the 1990s, the idea of encroaching deserts had become difficult to defend.
Africa's great green wall suffers from a major mismatch between ambition and effort. But that's not to say it should be ditched altogether.
The world's biggest desert used to be green, lush and full of hippos. A new theory suggests humans could have tipped the environment over the edge.
Cooking veg for 10,000 years.
The proof is in the pottery.
Welcome to your summer holidays, 750m years ago.
More evidence that planet Earth has gone through various frozen phases.
Sahara on the move.
Being perched off the northwest edge of Europe means that people in the UK are not often reminded of the vast Sahara desert situated only a few thousand miles to the south. This great desert is located…
Snow falling in California can start off as dust in the Sahara desert, research has shown. Due to heavy winds early in the…