Snow leopards stalk the highest living sheep on earth, while Japanese macaques relax in volcanic hot springs. Giant Pandas spend half their day eating woody grass, while their relatives the Tibetan brown bear must work hard to dig up a rabbit-like pika from burrows. Asia's highlands are home to some of the world's harshest environments and the highest-living species in the world have had to adapt in unique ways in order to survive at high altitude.