As winters warm and ice disappears, grizzly and polar bears’ age-old way of life is quickly changing. “Nature” tracks both at close range to see how they’re faring in “Arctic Bears,” premiering on PBS Sunday, February 17 at 8 p.m. (check local listings). <br /><br />Academy Award-winning actor F. Murray Abraham narrates the film, part of the 26th season of the Peabody and Emmy award-winning series produced by Thirteen/WNET New York for PBS. Major support provided by Canon U.S.A. Inc., Toyota, and the Corporation for Public Broadcasting. For more information, visit <a class="link" rel="nofollow" href="http://www.pbs.org/nature">http://www.pbs.org/nature</a>
