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  1. Tailoring Therapies: Cloned human embryo provides stem cells

    Scientists have for the first time carried test-tube cloning of a human embryo to the stage at which it can yield stem cells.

    By John Travis
  2. Anthropology

    European find gets Stone Age date

    A new radiocarbon analysis indicates that a skeleton found more than a century ago in an Italian cave dates to around 26,400 to 23,200 years ago.

    By Bruce Bower
  3. Earth

    Ancient whalers altered arctic lakes

    Analyses of sediment and water samples taken from an arctic lake indicate that an ancient whaling community left a mark on the lake’s ecosystem that persists today, even though the settlement was abandoned more than 400 years ago.