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  1. NIH OKs work on stem cells

    The U.S. government opened the door for U.S. scientists to receive federal funding for research on stem cells from human embryos.

    By John Travis

  2. Brain-Cell Loss Found in Narcolepsy

    The puzzling sleep disorder known as narcolepsy stems from the destruction of a small group of brain cells.

    By John Travis
  3. Health & Medicine

    Domestic Disease: Exotic pets bring pathogens home

    The potentially deadly monkeypox virus has spread from Africa to people in several states via infected pet prairie dogs.

    By Ben Harder
  4. Astronomy

    Sharpening a Heavenly Image: Clear view of globular cluster’s crowded core

    Using innovative optics to take the twinkle out of starlight, the Gemini North Telescope on Hawaii's Mauna Kea has recorded the sharpest infrared images ever of a crowded grouping of Milky Way stars.