News

  1. Humans

    Ancient DNA suggests new hominid line

    Genetic data unveil a previously unknown Stone Age ancestor in central Asia.

    By Bruce Bower
  2. Earth

    Bacteria show new route to making oxygen

    New discovery adds to the few known biological pathways for making and metabolically using the gas.

    By Sid Perkins
  3. Chemistry

    Better sleuthing through chemistry

    New fingerprinting method can pinpoint where, when or how a chemical warfare agent came to be.

    By Rachel Ehrenberg
  4. Physics

    You really can freeze hot water faster than cold*

    Experiments suggest that impurities in the warmer water may explain the “Mpemba effect” in which warm water freezes faster than cold water.