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The Nile is a river in Africa, often regarded as the longest river on Earth, although some sources claim the Amazon in South America is longer. The Nile has two major tributaries, the White Nile and Blue Nile, the latter being the source of most of the Nile's water and fertile soil, but the former being the longer of the two. The two rivers meet near Khartoum.The northern section of the river flows almost entirely through desert, from Sudan into Egypt, acountry whose civilization has depended on the river since ancient times. Most of the population of Egypt and all of its cities, with the exception of those near the coast, lie along those parts of theNile valley north of Aswan; and nearly all the cultural and historical sites of Ancient Egypt are found along the banks of the river.The Nile ends in a large delta that flows into the Mediterranean Sea.