Untamed Americas

From the Arctic to the peaks of the Andes, survival at great heights takes real guts. On the Yellowstone plateau, in a rarely filmed event, see newly awakened black bears go on the hunt for newborn elk calves. Get a ringside seat at one of the toughest mating contests on the planet as male bighorn sheep in the Rocky Mountains literally go head-to-head in a bloody battle for breeding rights. Fly over erupting volcanoes in Central America as fledgling parakeets test their wings above the thousand-foot Nindirí Volcano in Nicaragua. At the equator, see a bat that, until recently, no one knew existed, and that boasts the highest tongue-to-body ratio of any mammal in the world. In the Chilean Andes, watch as puma cubs strike out as they learn to hunt. With a maximum speed of 50 miles per hour, a caribou can outpace the wolf, which tops out at 40 miles per hour, but the wolf will use sheer stamina to gain the advantage. less