Global temperatures cooled to the point that glaciation became severe about

0 votes
     5 million years ago
      1.8 million years ago
      2.5 million years ago
      3 million years ago
asked Jun 29, 2012 in Anthropology by anonymous
    

1 Answer

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2.5 million years ago
answered Jun 30, 2012 by Bioshare ~Top Expert~ (34,070 points)



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