News

  1. 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
  2. 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.

    By Erin Wayman
  3. Humans

    A moving lift for poor families

    Federal housing subsidies didn’t fight poverty as hoped, but trading public housing for new neighborhoods brought psychological benefits.