Located in africa, the sahara desert spreads across thirty percent of the continent. This vast desert, also known as the great desert in arabic, is about nine million square kilometers in size. IT is also at least four point six million years old. This means that IT is one of the oldest places in the world. All deserts are dry, and the sahara is both dry and hot. IT is the largest hot desert in the world. We may think that all deserts are hot, but in fact some deserts are very cold. Many scientists believe that antartica, for example, is a type of cold desert. Most of the sahara is rocky ground, but there are also places with grass, lakes, mountains and even a sand. Sea is just what IT sounds like. IT looks like a sea of sand. When the wind blows, the sand looks like waves. Life in the sahara is difficult. About two many people live in the sahara. They usually move from place to place. There is water in a few parts of the sahara, and some people live in these places all year round. Not many animals can live in a place with such a dry and hot climate. They must adapt to survive. Cams, for example, go for a long time without drinking water. When they do find water, they can drink more than one hundred leaders of IT in thirty minutes. Panie foxes live in the desert too. They have large years to help their bodies stay cool. Today, the world's largest hot desert is getting even bigger. IT is now about ten percent larger than what I was about a century ago. But why is IT growing? Some scientists believe that part of the reason is climate change. As temperatures rise, summers in africa grow hotter and less rain falls, water bodies get smaller and the ground gets drier and drier. If we do not take effective measures, the desert will keep growing.