Arid and unforgiving, desert landscapes push their animal inhabitants to the extreme. From the mighty desert elephant to the small, shovel-snouted lizard, discover how these animals have adapted to become true desert survivors.

In Africa's arid, unforgiving climate, rivers offer respite from heat and thirst. But these rivers are also deadly—ruled by fearsome creatures who take no prisoners, including hippos, crocodiles and fish eagles.

Rainforests, one of the last remaining strongholds for our planet's wild creatures.