2014. Wikipedia contributors. "File:Claims Of Demoracy.png." Wikipedia, The Free Encyclopedia. Wikipedia, The Free Encyclopedia, 11 Jan. 2014.
ISBN 0-8166-1026-6. • Mech, L. David; Boitani, Luigi (2003). Wolves: Behaviour, Ecology and Conservation. University of Chicago Press. ISBN 0-226-51696-2.
“Joe Frazier.” Wikipedia, The Free Encyclopedia. Wikimedia Foundation, Inc. 25 November 2013. Web. 30 Nov 2013. “Marvin Hagler vs. Thomas Hearns.” Wikipedia, The Free Encyclopedia.
Polar Bear Evolution is a Continuing Story The polar bear, the largest land carnivore in North America, one of the largest animals in the world and a favorite at zoos worldwide, has, over the years, adapted to its harsh Arctic environment. The appropriately named ‘ursus maritimum’ or sea bear usually lives between 15 and 18 years in the wild and spends most of its life on ice. It is the most recent of the eight bear species. The first polar bear was a brown bear subspecies, with brown bear dimensions and brown bear teeth. The polar bear evolution was rapid due to the small population and extreme pressure to survive.
Matthiessen, Peter. The Snow Leopard.The Harvill press, 1996. Print. Miller, Tyler, and Scott Spoolman.Environmental Science.Brooks/Cole, 2008. Print.