Extras

Nature

Preview of The Alps: Winter's Fortress

Preview: S39 Ep8 | 30s

Experience the hostile and bitter cold ecosystems of the Alps, shaped by snow blizzards.

Nature

Rival Bucks Fight Over Mate

Clip: S39 Ep8 | 2m 58s

Among the chamois in the Alps, the mood is tense.

Nature

Secrets of Marmot Hibernation

Clip: S39 Ep8 | 2m 41s

A family of marmots prepares for their upcoming hibernation in a den 6 feet underground.