AN OCEAN OF SAND

You'd never expect to find skeletons of fish in the Sahara desert in Africa. But scientists have found them there. Long ago, the Sahara desert may have been an ocean of water. If that is true, the...

Hot and cold

A kangaroo rat's world is the burning hot desert. The desert is baked by the sun. The air above the sand is so hot it wiggles! During the day, a kangaroo rat sleeps in a cool, underground hole....