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  1. Article

    Open Access

    The unexpected importance of the fifth digit during stone tool production

    Unique anatomical features of the human hand facilitate our ability to proficiently and forcefully perform precision grips and in-hand manipulation of objects. Extensive research has been conducted into the ro...

    Alastair J. M. Key, Christopher J. Dunmore, Mary W. Marzke in Scientific Reports (2019)

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    Effects of Early Rearing History on Growth and Behavioral Development in Captive Chimpanzees (Pan troglodytes)

    Chimpanzees have one of the longest developmental periods of any mammal (Pereira and Fairbanks, 1993). Development includes a lengthy period of physical maturation (Riopelle, 1963; Doran, 1997), cognitive develop...

    Susan M. Howell, Melanie Schwandt, Jo Fritz… in Nursery Rearing of Nonhuman Primates in th… (2006)

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    Article

    Chimpanzee and human grips: A new classification with a focus on evolutionary morphology

    We observed grips by the hand during locomotor and manipulative behavior of captive chimpanzees to improve our ability to interpret differences between chimpanzees and humans in hand morphology that are not ea...

    Mary W. Marzke, Kathryn L. Wullstein in International Journal of Primatology (1996)