1. Challenges of Life

The planet's animals and plants have developed extraordinary survival strategies.

2. Reptiles

Amphibians and reptiles are masters of survival because they've devised extraordinary strategies.

3. Mammals

Mammals' warm blood, fat and fur allow them to thrive in every habitat except the deep ocean.

4. Fish

Fish are the most varied and diverse back-boned creatures on the planet.

5. Birds

Birds use feathers to solve life's challenges in radically different ways.

6. Insects

Masters of adaptation, the vast variety of insects outnumber all other animal species put together.

7. Hunters and Hunted

In the battle between predator and prey, nothing short of survival is at stake.

8. Creatures of the Deep

Some of the most remarkable species are the spineless creatures that inhabit the oceans.

9. Plants

Plants are dependent on three main elements for survival: sunlight, water and nutrients.

10. Primates

Intelligence, adaptability and resourcefulness have enabled primates to thrive.