The biggest desert in the world is the Sahara. It is about the same size as the United States.
The Sahara is also one of the hottest deserts. Temperatures can reach 130°F!
Big and small rocks make up most of the desert floor. Every now and then there is an oasis.
The Kalahari (ka-la-HAR-ee) is home to many animals, including African elephants! Temperatures can be as high as 117°F in the summer and as low as 8°F in the winter!