The highest mountain range on earth is home to extraordinary animals and remarkable ancient cultures. In the depths of winter, snow leopards creep into isolated mountain villages in search of food. In hiddenvalleys, bizarre-looking monkeys huddle for warmth in a frozen forest. Ancient Buddhist monasteries have age-old rituals creating beautiful works of art made from mountain sand and athletes compete in the gruelling Everest marathon. Strange and exotic creatures live in the Himalaya - the chiru, with the warmest wool in the world, snakes bathing in hot springs and wild yak competing in their annual rut. Breathtaking photography reveals a lost world of surprises in the latest landmark wildlife series from the BBC.