Preview | 30s
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.
Aired: 06/21/17Video has closed captioning.
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Dr. Kirk Johnson is the Sant Director of the Smithsonian Museum of Natural History.
Follow the dramatic ups and downs as the wildlife families brave a brutal winter.
Spring is here and Yellowstone is bursting into life, but the thaw is just beginning.
Get ready to explore a place where animals cope with 140 degree temperature swings.