The Arabian Desert, today the largest expanse of windswept sand dunes on Earth, experienced recurring periods of humidity millions of years ago, researchers report April 9 in Nature. The study may ...

For those who find themselves awed by arid landscapes, there’s no place like Africa. The continent boasts nine separate deserts, including a vast Sahara that sprawls across much of the north, the rust ...

Flora tends to sprout quickly once the typically dry landscape gets water. One of the driest regions on earth is shifting green, as an influx of heavy rainfall causes vegetation to grow in the ...