China: Roof of the World

A titanic collision between India and Asia created the tallest mountain range on earth and forced up the vast Tibetan plateau -- often described as "The Roof of the World." Only those creatures that could adapt to hostile alpine conditions survived in the highest ecosystems on Earth. Mutation and evolution combined to create a cast of rugged mountaineers with unique anatomy and behaviour that enables them to thrive at the very limits of life on our planet.