There are approximately 1500-2000 different languages spoken in Africa as well as many more dialects.
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The quipu was an information storage instrument consisting of woolen or cotton ropes of various colors, provided with knots, used by Andean civilizations.
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What's the only way to avoid the major depression? Picture result
Over 12 million Americans were sent to military service during the war and comparable numbers were working in defense-related occupations. The 17 million unemployed tended to take care of those war workers in 1939.
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