News

  1. Physics

    New limit placed on physics constant

    An analysis of how much the fine structure constant varies with the density of matter may help scientists determine whether the parameter changes with time.

    By Gabriel Popkin
  2. Life

    Flashy drug spotlights infection

    Doctors may be able to watch for invading microbes with a fluorescent antibiotic.

    By Beth Mole
  3. Life

    Broccoli compound protects rats from lethal radiation

    Treatment shields healthy cells from gamma ray attack but lets tumors die.

    By Jessica Shugart
  4. Health & Medicine

    Electrodes dupe brain into feeling touch

    Stimulating the right neuron at the right time gave monkeys the sensation of contact.