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  1. Humans

    Letters from the November 12, 2005, issue of Science News

    Big leap The pendular running gait described in “Stepping Lightly: New view of how human gaits conserve energy” (SN: 9/17/05, p. 182) as one of the most efficient bipedal gaits looks remarkably like the way eyewitnesses claim Bigfoot creatures move. In a Bigfoot hoax, one might use a gait that is unhuman but energy efficient, […]

    By Science News
  2. Paleontology

    Big bird terrorized South America

    Researchers in Argentina have discovered fossils that may represent the heftiest flightless bird to ever have roamed the planet.

    By Sid Perkins
  3. Paleontology

    Tusk analyses suggest weaning took years

    Changes in the proportions of various chemical isotopes deposited in mammoth tusks as they grew have enabled scientists to estimate how long it took juvenile mammoths to become fully weaned.