Sahara Desert
The Sahara is the largest hot desert in the world, stretching across North Africa and covering an area roughly the size of the United States.
GlobalNewsX
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Despite its current arid state, the Sahara was a green savanna with lakes and abundant wildlife as recently as 5,000-10,000 years ago, a period known as the African Humid Period, before a shift in Earth's orbit brought drier conditions.
The desert's extreme conditions include daytime temperatures that can exceed 120°F (49°C) and vast stretches of sand dunes, though much of the Sahara is actually rocky plateau rather than sand.
Millions of people live in and around the Sahara, including nomadic groups such as the Tuareg, who have adapted to its harsh environment over centuries.