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Vinony

Snowball Earth

proper noun

  1. worldwide glaciation episodes during the Cryogenian Period of the Neoproterozoic Era
L469035 on Wikidata ↗

Wiktionary

name

  1. The planet Earth when its surface was almost completely frozen some time earlier than 650 million years ago, according to a hypothesis aiming to explain certain enigmatic features in the geological record, such as apparently glacial sedimentary deposits found at tropical paleolatitudes.