The document provides information about the Arctic tundra biome. It describes the extreme seasonal differences, with very warm summer temperatures and bitterly cold winter temperatures down to -70°C. Plant life is limited to small, hardy species that can survive the frozen soil. Animal life includes polar bears, arctic foxes, caribou, and birds. The tundra plays an important role in regulating global climate. Despite the harsh conditions, over 1700 types of plants and many animal species have adapted to survive in the Arctic tundra.