News

  1. 2012 International Astronomical Union General Assembly

    Science News’ coverage of the IAU meeting held August 20-21 in Beijing.

    By Science News
  2. Neuroscience

    Nonstick trick in the brain

    Getting drugs into the brain has proved to be a nanoscale puzzle: Anything bigger than 64 nanometers — about the size of a small virus — gets stuck in the space between brain cells once it gets through the blood-brain barrier. Justin Hanes of Johns Hopkins University School of Medicine and colleagues got around this rule by coating particles destined for brain cells in a dense layer of a polymer called polyethylene glycol.

    By Sarah Zielinski
  3. Humans

    Africans’ genes mute on human birthplace

    Latest DNA studies confirm previous research on the prehistory of African groups, but still can’t locate the root of the species.