a land of extremes, home to spectacular wildlife. for centuries, people and animals have battled for supremacy. but now enemies are becoming allies. together they face new challenges in our rapidly changing world. >> you are at the mercy of the elements. >> this is the story of what it takes to survive. on the edge of the world. ♪ for 12 months, our film crews journeyed from the southern tip of the continent -- >> whoa! >> -- to the peaks of the andes. >> we made it! >> equipped with cutting-edge