At the top of the earth lie the isolated outposts of the arctic islands. Some migrate here, others tough it out all year round, but all the species that make their home here have adapted to these unique habitats in amazing ways.
The Arctic circle is a challenging place to exist, but at the arctic's heart the pressures are even more unimaginable. This is a frozen universe, where arctic specialists come face to face with the jaws of death on a daily basis.
With almost a third of the world's forest, the Boreal forest is the planet's largest land biome. Bears, wolves and even tigers claim it as their own. But as global warming takes hold, their home is changing beyond recognition.
