image: An adult female Sumatran Orangutan resting in Gunung Leuser National Park, Indonesia. This image relates to an article that appeared in the June 1, 2007, issue of the journal Science, published by AAAS. The study, by Dr. S.K.S. Thorpe and colleagues at University of Birmingham in Birmingham, UK, was titled "Origin of Human Bipedalism As an Adaptation for Locomotion on Flexible Branches." view more
Credit: Image courtesy of SKS Thorpe, University of Birmingham, via <i>Science</i>-AAAS.