NATURE presents Christmas in Yellowstone, a breathtaking look at wintertime deep within America’s first national park. NATURE follows in the snowy footprints of Yellowstone’s red foxes, spies on the predatory warfare of wolves and elk, and climbs into the den of a grizzly bear that gives birth to two cubs while deep in hibernation. In addition to mesmerizing footage of landscapes and wildlife, trail alongside author and photographer Tom Murphy, who has been coming to Yellowstone for the past 26...