Evidence of “snowball Earth” found in ancient rocks
SMRTR summary
Scottish rocks reveal Earth's dramatic shift from tropical to "snowball" state 717 million years ago, kicking off the 58-million-year Sturtian glaciation and later Marinoan ice age, setting the stage for multicellular life to evolve.
SMRTR provides this summary for quick context. The original article belongs to Ars Technica.
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