News

  1. Planetary Science

    Martian History: Weathering a new notion

    Researchers suggest that intermittent impacts by huge asteroids and comets some 3.5 billion years ago profoundly influenced the landscape of Mars.

    By Ron Cowen
  2. Health & Medicine

    First-Line Treatment: Chronic-leukemia drug clears a big hurdle

    In its first large-scale test on newly diagnosed leukemia patients, the drug imatinib—also called Gleevec and STI-571—stopped or reversed the disease in nearly all patients receiving it.

    By Nathan Seppa
  3. Physics

    Identity Check: Elusive neutrinos morph on Earth, as in space

    Strengthening a challenge to the prevailing theory of particle physics, measurements of elusive particles called antineutrinos from nuclear reactors suggest that no neutrino types, be they matter or antimatter, have stable identities.