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Orangutan, Sumatra (USNM 143599)
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 143599 (http://collections.mnh.si.edu/search/mammals/?irn=7251584), is an orangutan from the island of Sumatra, Indonesia (Pongo abelii) that was collected by W.L. Abbott at Aru Bay on December 26th, 1905. This juvenile female weighed 26 lbs.
This is a CT scan of the cranium of USNM 143599, a Sumatran orangutan (Pongo abelii). 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.