A trio of researchers from the University of New Mexico, Harvard University and the University of Southern California has found evidence that suggests the curved phalange in apes is an inherited trait, not one that comes about from climbing. In their paper published in Proceedings of the National Academy of Sciences, Ian Wallace, Loring Burgess and Biren Patel describe their study of the skeletal remains of Suzy, a chimpanzee that was raised to behave like a human being back in the 1930s, and what they learned about phalangeal curvature in chimpanzees.
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Source: Phys.org