Latest Issue of Science News

February 19, 2000

  • News

    Protein may help the eyes tell time

    A human version of melanopsin, originally found in the skin, eyes, and brains of frogs, has been discovered in the inner retina and may be the long-sought photoreceptor for the human biological clock.
  • News

    A chance to point Hubble

    Get out your heavenly wish list: Astronomers working with the Hubble Space Telescope are soliciting suggestions for where to point the orbiting observatory this summer.
  • Feature

    Eau, Brother!

    The combination of advanced sensor materials and powerful computer chips promises devices that can sense threats ranging from bacteria in food to explosives in land mines.
  • Feature

    Hunting for Higher Dimensions

    Inspired by recent theoretical insights, physicists at accelerators and gravitational laboratories are searching for clues to dimensions beyond the four dimensions of space-time.
  • News

    Testosterone shows hurtful, helpful sides

    A small but significant portion of men taking large doses of testosterone experience mania, although moderate doses of the male sex hormone show promise in boosting the mood and sex drive of HIV-infected men.