Emperor penguins — serial monogamists —move from ocean to ice to choose their mates for the year.
A hungry owl and a clever vole engage in a snowy game of cat and mouse.
This mama otter keeps her baby’s fluff on fleek.
Narwhals are some of the most mysterious and elusive animals in the oceans.
Red fox can hear the sounds of mice under six feet of snow during freezing Yellowstone winters.
I felt like I wanted to hug him.
When that bamboo diet doesn’t get you fat enough to hibernate…
Tiny squirrels and giant bears alike must take great risks to prepare for winter.
How do emperor penguins survive the cruelest winters on earth?
One of only 40 Amur leopards left in the wild, a mother works hard to get her young cub through the winter.
Within their first year of life, penguin chicks face many extraordinary hardships in the arctic.
Sandhill crane families face a storm on the way to Mexico.
She isn’t much to look at, but this Bald Eagle’s got attitude for days.
Young manatees boop noses with alligators in the warm pools off the coast of Florida. Explore North America on an all-new ‘Seven Worlds, One Planet’ this Saturday at 9/8c.
These aerial predators must spend every daylight hour scanning the slopes for prey.
When chicks are left home alone in negative 40 degree weather, huddling is their only hope.