How can something cold keep you warm?

Fish survive the winter by swimming in water under ice, small mammals spend the winter in tunnels under the snow and peoples of the Northlands survive by building homes from ice. How does this work? Watch the video and learn something new. Very often we assume something to be true but when we look more closely, we find that the exact opposite might be true. Keep an open mind and be willing to learn, there are so many amazing things in our world!