Snowball Earth/Definition: Revision history

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9 January 2021

6 January 2009

  • curprev 17:1317:13, 6 January 2009imported>Chris Day 170 bytes +170 New page: <noinclude>{{Subpages}}</noinclude> A hypothesis that proposes Earth was entirely covered by ice during parts of the Cryogenian period, from 790 to 630 million years ago.