Desert tortoises have lived in the deserts of California, Arizona, Nevada and Utah since the Pleistocene. In the early years of the 20th century, they still thrived within the Southwest's arid ...

A discussion about UNESCO’s six-year Arid Zone Programme. Many of the world’s deserts were once fertile regions which supported ancient civilizations that have since disappeared. It is important to ...

After the recent discovery of the possibility of green pastures and grasslands in the Sahara Desert nearly 4,000 years ... which are underneath the lake bed. The lake has today largely disappeared ...