Tune in for "Great Yellowstone Thaw" starting June 21
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Great Yellowstone Thaw
Follow the dramatic ups and downs as the wildlife families brave a brutal winter.
Journey with Kirk Johnson to Yellowstone, where wolves, grizzlies, beavers and Great Gray owls survive one of the greatest seasonal changes on the planet. As the temperature swings 140 degrees, cameras capture how the animals cope.
Tune in Wednesdays, beginning June 21, at 9:00 p.m. on Nine PBS.