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  1. Stem cells sense stiffness

    Stem cells can sense the texture of whatever medium they're growing on and use this quality to guide their fate.

    By Christen Brownlee
  2. Math

    Pancake Sorting

    Flipping pancakes to stack them according to size can be a tricky business.

    By Ivars Peterson
  3. Humans

    From the August 29, 1936, issue

    Fighting forest fires with science, a young Milky Way, and atom-smashing cosmic rays.

    By Science News
  4. Ecosystems

    Madagascar’s Fantastic Forests

    Produced by WBUR in Boston to accompany a special program on Madagascar, this award-winning Web site offers a remarkably detailed look at life on this island, with a focus on the struggle to preserve Earth’s diversity of life.