Broadcast 26 January 1984, this programme describes the inhospitable habitats of snow and ice. Mount Rainier in America is an example of such a place: there is no vegetation, therefore no herbivores and thus no carnivores. However, beneath its frosty surface, algae grow and some insects, such as ladybirds visit the slopes. Africa's mountains are permanently snow-covered, and beneath peaks such as Kilimanjaro and Mount Kenya, there are communities of plants and animals. However, they endure extremes of temperature within 24 hours like no other. At night they are in danger of freezing solid, and during the day they may be robbed of moisture. Lobelias combat this by either producing pectin or insulating themselves with an abundance of leaves analogous to a fur coat. The Andes run the length of South America and are surrounded by the altiplano. On these high plains there is a large and varied population of animals. Antarctica is bigger than the whole of Europe and is for the most part devoid of life. However, its shores and waters are fertile and are home to fur seals, their main food (krill), and several species of penguin. By contrast, because of its connection to more temperate regions, the Arctic has been colonised by a large variety of species. They include Arctic foxes, polar bears, lemmings, snowy owls, and the region's most powerful hunter, the Inuit. It is also a temporary home to migratory animals, such as the caribou and snow goose.