6. Forest
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From deep in the undergrowth to the highest tree, forests are home to two-thirds of all mammal species. Discover how they overcome the many challenges of life in a crowded world.
5. Heat
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A look at how, from the barren Australian outback to the remote, dry deserts of Namibia, mammals use their ingenuity, incredible intelligence and remarkable resilience to beat the heat.
4. Cold
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From ice-covered seas to snow-capped mountains, mammals have conquered the cold, living in the harshest places on Earth, thanks to their remarkable intelligence and adaptations.
3. Water
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From freshwater jungle ponds to the dark depths of the open ocean, air breathing mammals have found remarkable ways to overcome the many challenges of a life in water.
2. The New Wild
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Mammals have mastered every environment on Earth, but today the planet is changing faster than ever. Mammals must change with it to have a chance of survival in this, the new wild.
1. Dark
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The dark, a world of opportunity for mammals. More than two-thirds prefer the cover of the night, with some now returning to the safety of the shadows in order to avoid us.
