Africa: Here, life springs from spilt blood, and must bow to the raging sun.
Plenty of water, warmth and light provide perfect conditions for life to thrive and make the jungles the most diverse lands on Earth. But make no mistake, this is no Eden.
Grasslands are some of the most volatile lands on the planet. We reveal the extraordinary challenges animals must overcome, and how our changing world is making survival even tougher than before.
Step inside the most frigid habitat known to Earth - the poles. Here, the planet's ultimate survivalists include whale-hunting polar bears, leopard-seal dodging penguins and a pack of Arctic wolves.
The planet's hottest habitats - our deserts - are getting even hotter, drier and bigger, yet a host of remarkable animals still survive in the harshest conditions.
Delve beneath the surface of the largest habitat on Earth - our oceans - to uncover a world of extraordinary extremes from crushing depths to stormy coasts and vast blue deserts to crowded reefs.
The highest mountains on Earth are home to snow leopards, golden eagles and mountain goats. But only the toughest can endure the extreme weather, scarce food supplies and limited oxygen.
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