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About the Cover

Cover Figure


COVER An orangutan (Pongo abelii) from Sumatra, Indonesia, in an upright posture. Orangutans, a more distant relative of humans than chimps or gorillas, move in a bipedal fashion on small flexible branches. Human bipedalism may thus reflect selection of a behavior that was present in the common great ape ancestor. See page 1328. Photo: Art Wolfe/Getty Images

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Science. ISSN 0036-8075 (print), 1095-9203 (online)