Home to a trillion trees, the boreal forest encircles the entire globe. In winter, this frozen forest, is a silent icescape, with most signs of life hidden beneath a dense blanket of snow. But a few arctic specialists have found ingenious ways to survive the brutal winters in this ice forest. And when summer arrives, so do the animals.

The arctic is the planet's most forbidding and isolated habitat. The Tundra is a brutal and punishing terrain, and technically a desert, with all moisture trapped in ice and snow. Winter lasts eight months of the year, and the average temperature of the tundra is minus 18 degrees Fahrenheit - cold enough to stop the human heart. But, it is anything but lifeless.

This is the planet's most extreme wilderness. Here in the Arctic, creatures carve out a grueling existence amongst vast snow-forests and the brutal tundra. During winter, the Arctic Ocean locks these lands in ice and 24 hours of night, but summer brings around the clock sun, and the ocean and its islands burst into life attracting animals from all over the globe, for a summer feeding frenzy.