Have we had more than one Ice Age?



  1. 0 Votes

    The Snowball Earth idea, when “the whole world was frozen over” does not coincide with the recent ice age when there were mammoths. The recent (past 2 million years) glacial period, when mammoths lived, was very, very far from covering the whole earth; maximum glacier advance in North America was about as far south as southern Indiana, and Long Island. Snowball Earth, when it is likely that indeed the entire earth was covered with ice, was in the Proterozoic eon around 700 million years ago; there may have been a similar episode earlier, about 2.4 billion years ago. But there were no mammoths around to see either of those episodes — there were not even any animals with eyes.

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