Science
2019-04-11 @ 16.47.02 ∈ In English
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Study shows the Sahara swung between lush and desert conditions every 20,000 years
[This] climatic pendulum is mainly driven by changes to the Earth’s axis as the planet orbits the sun, which in turn affect the distribution of sunlight between seasons — every 20,000 years, the Earth swings from more sunlight in summer to less, and back again.








