The Sahara gets its name from the Arabic word for ' deserts'. it is the largest hot desert in the world.
the Sahara is more than 4828 kilometers from east to west, across the full length of northern Africa, and 1287-1931 kilometers from, north to south.
Most of its landscape has been shaped over time by wind, and includes constantly shifting sand dunes, sand seas called ergs, barren stone plateaus, enormous gravel plains, dry valleys and salt flats, and lush oases. there are also several mountain ranges within the Sahara, and many are volcanic. the Sahara desert is divided into different geographic zones.
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