They are very hot but can be very cold in the winter,Many animals live under the cooler sand.
Many animals sleep during the day and hunt at night when it is cooler.
Deserts are very dry.
The Gobi Desert in Asia is cold for most of the year.
Mountains on the edge of deserts prevent rain from entering. The rain stays on the other side of the mountain creating rain forests next to many deserts. These deserts are called rain shadows.
The world's deserts are growing through desertification. This happens when grasslands that border the desert become as dry as the desert. Desertification can also be caused by intense farming.
Deserts are second only to tropical rain forests in the variety of plants and animals that live there.