News

  1. Astronomy

    Cosmic Couple: One galaxy, two gravitational beasts

    Astronomers welcomed the discovery of two black holes in one galaxy, which confirms some ideas about how galaxies and black holes merge and evolve.

    By Carol Marzuola
  2. Earth

    Rural living may hobble sperm

    An epidemiological study provides evidence that sperm concentrations in men residing in rural areas are significantly lower than those of men living in urban centers.

    By Janet Raloff
  3. Earth

    Arsenic Agriculture? Irrigation may worsen Bangladesh’s woes

    Researchers investigating an unfolding massive epidemic of arsenic poisoning in Bangladesh say they have evidence that local irrigation practices may be contributing to the problem.

    By Ben Harder
  4. Physics

    Cold War Conductor: Ultracold plutonium compound shows no resistance

    Researchers studying the crystalline properties of radioactive plutonium have discovered the first plutonium-based superconductor.