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Early Earth's Mild Climate May Signal Life on Other Planets | Earth.com
Early Earth has always had a volatile reputation. Previous studies have estimated various scenarios ranging from an ice-covered, snowball Earth to a sweltering environment complete with acidic oceans. David Catling, a UW professor of Earth and space sciences, and Joshua Krissansen-Totton, a UW doctoral student in Earth and space sciences, are quoted.
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