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  1. Anthropology

    Humans may have started tending animals almost 13,000 years ago

    Remnants from an ancient fire pit in Syria suggest that hunter-gatherers were burning dung as fuel by the end of the Old Stone Age.

    By Richard Kemeny
  2. Physics

    Falling objects in orbit show Einstein was right — again

    For more than two years, a pair of metal cylinders fell at the same rate in space, confirming the equivalence principle, a key tenet of general relativity.

    By James R. Riordon
  3. Climate

    How Kenyans help themselves and the planet by saving mangrove trees

    Communities in Kenya took action to restore their coastal mangrove forests, reaping economic and environmental benefits.