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  1. Tech

    Wax-coated plastic morphs between soft and stiff

    Heat-controlled materials could serve as skeleton for shape-shifting robots.

    By Meghan Rosen
  2. Health & Medicine

    Organic foods may contain extra antioxidants

    Contrary to previous studies, a new analysis finds that organic crops have nutritional benefits over conventionally grown foods.

    By Beth Mole
  3. Climate

    Cell phone towers monitor African rains

    Scientists used cell phone towers to monitor African rains, a method that could track weather in regions without robust meteorological infrastructure.

    By Thomas Sumner
  4. Anthropology

    Romanian cave holds some of the oldest human footprints

    A group of Homo sapiens left footprints about 36,500 years ago, not 15,000 as scientists had thought.