News

  1. Cool Discovery: Menthol triggers cold-sensing protein

    A cell-surface protein that lets ions flow into cells responds to menthol and cool temperatures.

    By John Travis
  2. Astronomy

    X-Ray Universe: Quasar’s jet goes the distance

    Collisions with photons left over from the birth of the universe appear to have generated the longest X ray-emitting jet ever found in a distant galaxy.

    By Ron Cowen
  3. Health & Medicine

    Vitamin Void: Heart disease may lurk in B12 deficiency

    Meatless eating typically improves cardiovascular health, but a dietary shortage of vitamin B12 may lead to an overabundance of the amino acid homocysteine in some vegetarians, which could pose a risk to their hearts.

    By Ben Harder
  4. Ecosystems

    Biodiversity Hot Spots: Top 10 sea locales make sobering list

    Biologists have identified the world's most vulnerable coral reefs, each with organisms found nowhere else and threatened by human influence.