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      September 1, 2014Evolution

      The Latest Fossil Finds Make the Puzzle of Human Evolution Harder Than Ever to Solve

      The latest molecular analyses and fossil finds suggest that the story of human evolution is far more complex—and more interesting—than anyone imagined
      June 1, 2009Sustainability

      Top 25 Green Energy Leaders

      Forward-thinking companies, universities and municipalities are finding creative ways to run on renewable power
      May 1, 2017Behavior & Society

      The Social Genius of Animals

      Research shows that animals interact in amazingly sophisticated ways
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