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Orangutan, Sumatra (USNM A22937)
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 A22937 (http://collections.nmnh.si.edu/search/mammals/?irn=7423459), is a female orangutan (Pongo abelii) from the island of Sumatra, Indonesia that was collected by E. Gerrard.
This is a CT scan of the left talus of USNM A22937. 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.