简介：Across the planet, every animal--predator or prey--has survival advantages honed by millions of years of evolution. Watch some of nature's most accomp
简介：Bear drops into the swamps of Florida's Everglades, where at least 60 tourists need to be rescued each year. He trudges through the swamp and shows ho
简介：Part 2 of 2. In Patagonia, Bear skins a hare, scales a cliff, tracks a puma, drinks dirty water, and crosses the Perito Moreno glacier, a vast frozen
