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by dev1ycan
832 days ago
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"For several hundred thousand years, the Sahara has alternated between desert and savanna grassland in a 20,000-year cycle caused by the precession of Earth's axis (about 26,000 years) as it rotates around the Sun, which changes the location of the North African monsoon." https://en.wikipedia.org/wiki/Sahara#:~:text=For%20several%2.... |
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