News

  1. 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

  2. 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

  3. Katrina’s Two-Sided Impact: Survey finds disorders, resilience after tragedy

    In the year after surviving Hurricane Katrina, Gulf Coast residents experienced a surge in serious mental disorders combined with elements of personal growth and emotional resilience.

    By Bruce Bower
  4. Planetary Science

    Doggone! Pluto gets a planetary demotion

    The solar system has only eight planets, and Pluto isn't one of them, according to the first-ever definition of a planet, approved last week by the General Assembly of the International Astronomical Union.