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Orangutan, Sumatra (USNM 143603)
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 143603 (http://collections.mnh.si.edu/search/mammals/?irn=7251588), is a juvenile female orangutan (Pongo abelii) from the island of Sumatra, Indonesia that was collected by W.L. Abbott at Aru Bay on February 3rd, 1906. This female weighed 60 lbs.
This is a CT scan of the left navicular of USNM 143603. 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.