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snowball EarthArs Technica
•86% Informative
Scientists have found evidence of the transition from a tropical Earth to a frozen one 717 million years ago .
The Port Askaig Formation is one of the thickest (up to 1.1 km ) and most complete records of Cryogenic glaciation.
Underneath the rocks that formed during the Sturtian glaciation is a deep layer of carbonate rocks.
These organisms had been used to perpetual cold for millions of years , and now they faced the struggle of adapting as soon as possible—or perishing. What about those that survived? They ended up being the ancestors of all animals that ever existed, and that includes us. Journal of the Geological Society , 2024 . DOI: 10.1144 /jgs2024-02.
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