News

  1. Health & Medicine

    B12 shortage linked to cognitive problems

    Subtle B12 deficiency plagues a surprising share of the elderly and may harm the brain, studies suggest.

    By Janet Raloff
  2. Health & Medicine

    Nose divides sweet from foul

    The way scent-detection machinery is laid out suggests that people are born with some innate olfactory preferences.

    By Nick Bascom
  3. Physics

    Neutrinos seen to fly faster than light

    Though few physicists expect it to withstand scrutiny, confirmation of the observation would shake physics to its core.

    By Devin Powell
  4. Earth

    Pole flips tied to plate tectonics

    A lopsided arrangement of continents could lead to reversals in Earth's magnetic field.