Feature

  1. Humans

    2009 Science News of the Year: Humans

    An artist’s illustration shows how a female Ardipithecus may have looked. An analysis of Ardi’s bones, uncovered from 1992 through 1997, was released this year. Credit: J.H. Matternes Ardi puts new spin on hominid evolution A 4.4-million-year-old partial female skeleton discovered in Africa, along with fossils from at least 36 of her comrades, provide the […]

    By Science News
  2. Earth

    2009 Science News of the Year: Environment

    Recent monitoring (from a gondola in Washington state, shown) reveals that rates of tree death are up. Credit: Univ. of Washington Routine tree deaths doubled Small background rates of everyday tree death have doubled in old-growth, western forests since 1955, possibly because of climate change, researchers report (SN: 2/14/09, p.