When that bamboo diet doesn’t get you fat enough to hibernate…
Red fox can hear the sounds of mice under six feet of snow during freezing Yellowstone winters.
Love is in the air, and this Arctic ground squirrel doesn’t want to miss his first date!
It’s an uphill battle to climb this muddy mountain.
So many tunnels, so little time. Will this Marten get lucky and find a mouse?
How do emperor penguins survive the cruelest winters on earth?
By carving steps in the ice, the film crew saved part of a penguin colony.
When chicks are left home alone in negative 40 degree weather, huddling is their only hope.