Tundra locations -- Where in the world? -- Cool climates -- Different types of tundra -- Technology in the tundra -- Life in the tundra -- Lichens, plants and trees -- Mammals -- Birds, whales, fish and insects -- Endangered tundra -- Working in the tundra -- Eco challenge -- Staying warm.

The coldest place on earth -- Where in the world? -- Desert locations -- A cold climate -- The moving tundra -- Different types of deserts -- Tundra zones -- Technology in the desert -- Life in the tundra -- Lichen, plants and trees -- Mammals -- Birds, fish, whales and insects -- The desert in danger -- Working in the tundra -- Eco challenge.