Their thick coat and compact build are excellent adaptations to living in the arctic.
Several sites have more information on the living muskox.
As its name implies, the woodland muskox is thought to have lived in woodland and plains. Bootherium bombifrons has a very interesting history. The original specimen was found at Big Bone Lick, KY on an expedition sent by Thomas Jefferson. For many years paleontologists thought at least two different types of woodland muskoxen were present in the Midwest 14,000 years ago. The living muskox was one of the relatively few large mammals in North America that did not go extinct approximately 10,000 years ago.