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  1. High-protein diets boost hunger-taming hormone

    Eating protein appears to boost blood concentrations of a hormone recently found to restrict appetite.

    By Christen Brownlee
  2. Physics

    Radiant plasma may combat cavities

    Dentists may someday disinfect teeth with a newly demonstrated, handheld stylus that exudes glowing plasma deadly to cavity-causing bacteria.

    By Peter Weiss

  3. 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
  4. Math

    Pancake Sorting

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

    By Ivars Peterson
  5. Humans

    From the August 29, 1936, issue

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