S1, E2: In the heart of Southeast Asia lies the tropical island of Borneo. Twice the size of the British Isles, it is the third largest island on earth and home to possibly the greatest diversity of life of any island - from flying lizards sun bears to orangutans. Its huge variety of habitats, from bustling coral reefs and ancient jungles to towering mountains, has given rise to over 60,000 species of plants and animals - many found nowhere else on earth.