Science Advances
2021-12-02 @ 12.55.39 ∈ In English
2021-11-22 @ 18.33.51 ∈ Suomeksi
2020-10-15 @ 13.39.36 ∈ Suomeksi
2019-01-03 @ 13.28.34 ∈ In English
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.