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David Attenborough reveals why forests are the ultimate test of survival for mammals and how they have overcome the challenges of life in this multidimensional, complex and continually changing environment.

Mammals

Forest

By pushing themselves and their bodies to the absolute limit, mammals like the camel, echidna, and vampire bat have found remarkable ways to beat the heat, surviving in some of the hottest places on Earth.

Heat

From ice covered seas to snow-capped mountains, mammals have conquered the cold, living in the most inhospitable places on Earth thanks to their intelligence and adaptations.

Cold

From freshwater jungle ponds to the dark depths of the open ocean, air breathing mammals have found ways to overcome the challenges of a life in water.

Water

Mammals have mastered every environment on Earth, but today the planet is changing rapidly, thanks to one mammal in particular; as humans reshape the planet, mammals must change with it and find surprising ways to survive this new wild.

The New Wild

With heightened senses verging on superpowers, over two thirds of mammal species are creatures of the night with some even returning to the dark side as their daytime world gets more and more crowded.

Dark

Sir David Attenborough reveals how mammals have conquered the Earth, uncovering the secrets to their success with their winning design, incredible adaptability, unrivalled intelligence, and unique sociability.

S1 E5 | Heat

E6 | Forest

E5 | Heat

E4 | Cold

E3 | Water

E2 | The New Wild

E1 | Dark