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.

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.

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.

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.

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.

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.