About Sahara desert

Sahara, largest desert in the world. Filling nearly all of northern Africa, it measures approximately 3,000 miles (4,800 km) from east to west and between 800 and 1,200 miles from north to south and has a total area of some 3,320,000 square miles (8,600,000 square km); the actual area varies as the desert expands and contracts over time. The Sahara is bordered in the west by the Atlantic Ocean, in the north by the Atlas Mountains and Mediterranean Sea, in the east by the Red Sea, and in the south by the Sahel—a semiarid region that forms a transitional zone between the Sahara to the north and the belt of humid savannas to the south.

Kalahari Desert, large basinlike plain of the interior plateau of Southern Africa. It occupies almost all of Botswana, the eastern third of Namibia, and the northernmost part of Northern Cape province in South Africa. In the southwest it merges with the Namib, the coastal desert of Namibia. The Kalahari’s longest north–south extent is roughly 1,000 miles (1,600 kilometres), and its greatest east–west distance is about 600 miles; its area has been estimated at some 360,000 square miles (930,000 square kilometres).

About Taklamakan Desert

Takla Makan Desert, Chinese (Pinyin) Taklimakan Shamo or (Wade-Giles romanization) T’a-k’o-la-ma-kan Sha-mo, great desert of Central Asia and one of the largest sandy deserts in the world. The Takla Makan occupies the central part of the Tarim Basin in the Uygur Autonomous Region of Xinjiang, western China. The desert area extends about 600 miles (960 km) from west to east, and it has a maximum width of some 260 miles (420 km) and a total area of approximately 123,550 square miles (320,000 square km). The desert reaches elevations of 3,900 to 4,900 feet (1,200 to 1,500 metres) above sea level in the west and south and from 2,600 to 3,300 feet (800 to 1,000 metres) in the east and north.

Kalahari Desert, large basinlike plain of the interior plateau of Southern Africa. It occupies almost all of Botswana, the eastern third of Namibia, and the northernmost part of Northern Cape province in South Africa. In the southwest it merges with the Namib, the coastal desert of Namibia. The Kalahari’s longest north–south extent is roughly 1,000 miles (1,600 kilometres), and its greatest east–west distance is about 600 miles; its area has been estimated at some 360,000 square miles (930,000 square kilometres).