At least two species of muskoxen inhabited areas of North America during the last Ice Age: the muskox (Ovibos moschatus)and the woodland muskox (Bootherium bombifrons). Ovibos moschatus is the same muskoxen still found in the artic today. However, when the glaciers expanded south into the Midwest, arctic animals like the muskox found hospitable habitat in area. This living muskox is one of the relatively few large mammlas in North America that did not go extinct approxiamately 10,000 years ago. The woodland muskox and survival of the muskox is being studied by paleoontologists.