In the Arctic, winter lasts eight months and temperatures fall as low as -58 F. Few animals can survive such extreme conditions. The Arctic fox, however, is unique. It lives farther north than any other land mammal in the world. How can it survive the harsh conditions? Biologist Maarten Loonen wanted to find out. Since 1990, he has traveled to the Arctic every year to study these uncommon foxes. In Arctic Fox: Very Cool , kids follow Loonen as he...