Cold

Davina travels to the Svalbard islands in the Arctic Circle - the icy home of the polar bear and one of the coldest places on the planet, where temperatures can drop to -40C. Just 800 miles from the North Pole, her journey begins in Longyearbyen, one of the most northerly towns in the world. It is April and the beginning of the long Arctic summer, where the sun will not set for four months. Davina watches an enormous polar bear stalk a giant walrus by swimming under the broken ice, before meeting a glaciologist who takes her deep inside an enormous glacier, an ice cave filled with sparkling diamond-like ice crystals.