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Follow a runner in the world's most dangerous marathon.

A wildebeest calf is seized in the jaws of a lioness...find out what happens next!

Ecologist Chris Morgan camps alongside bears in the Alaskan wilderness.

Meet Lightening, a wild stallion who learns to trust humans.

In a dangerous attempt, crocodile eggs are taken from a nest for examination.

Matt encounters Borneo’s deadly king cobra.

What’s more dangerous than capturing crocodiles? Releasing them.

Seasons dramatically transform the Nordic landscape.

Spring brings new life but the race begins to survive before the next freeze.

A mother exploits a discarded woodpecker hallow to nuture her eggs.

Just hours old, the ducks follow their mother in search of food.

See amazing footage from the Nordic wilderness.

A meerkat mother has to watch over her hyper babies.

The serious job of finding food must be taught.

The team tags a cougar to track her during her breeding cycle.