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Orangutan, Sumatra (USNM 143590)
Orangutans are great apes and one of our closest living relatives. The Smithsonian Institution’s Division of Mammals (http://vertebrates.si.edu/mammals/) houses many orangutans in its scientific collections.
This specimen, USNM 143590 (http://collections.mnh.si.edu/search/mammals/?irn=7251575), is an adult male orangutan from the island of Sumatra, Indonesia (Pongo abelii). It was collected by W.L. Abbott in 1905 and weighed 190 lbs with a head to body length of 990 mm.
This is a CT scan of the right navicular of USNM 143590. These three-dimensional scans are made publicly available through the generous support of the Smithsonian 2.0 Fund, provided from the annual gifts of the Smithsonian National Board to the Secretary to use at his discretion (http://smithsonian20.si.edu/fund.html), and the Smithsonian Collections Care and Preservation Fund.