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  1. Anthropology

    Ancient boy died surprisingly young

    Imaging analysis reduces age of Australopithecus sediba youngster from 9 to 7.5 years old.

    By Bruce Bower
  2. Climate

    Reef fish act drunk in carbon dioxide–rich ocean waters

    In first test in the wild, fish near reefs that bubble with CO2 lose fear of predators’ scent.

    By Meghan Rosen
  3. Anthropology

    Turkana Boy sparks row over Homo erectus height

    Estimating the adult height and weight of an ancient youth from his skeleton has proven tricky.

    By Bruce Bower
  4. Climate

    Ocean bacteria may have shut off ancient global warming

    Ocean-dwelling bacteria may have helped end global warming 56 million years ago by gobbling up carbon from the CO2-laden atmosphere.