From the poles to the highest mountain peaks, there are surprising frozen worlds found on every continent, and each is home to unique and remarkable animals.

At the top of our planet lies the Arctic Ocean - a shape-shifting world of ice and water, home to unique animals like polar bears, harp seals and bowhead whales.

Found on every continent, mountains create unique frozen worlds, home to extraordinary animals that must overcome the crushing conditions of the cold.

Antarctica is the most hostile of Earth’s frozen worlds. Yet even here, life finds a way not just to survive, but thrive.

In the far north of our planet lie vast frozen lands of snow-covered forest and open tundra. These are lands of extremes that push animals to their very limits.

Our frozen planet is changing. We meet the scientists dedicating their lives to understanding what these changes mean for animals, people and the world as a whole.