Earth's Great Rivers

A look at the extraordinary wildlife, landscapes and people of the Amazon, the world's greatest river; from boiling streams and transparent lagoons, to pink river dolphins and riotous river carnivals, its great size hides spectacular secrets.

A look at the astonishing wildlife, landscapes and people of the Nile, the world's longest river; from elephants and leopards, to extreme kayakers and ancient wonders, its great length is a lifeline for astonishing wildlife and cultures.

The Mississippi, from frozen waterfalls to time-traveling barges, from busy beavers to mysterious swamps, connects a continent like no other river. At the end of its 3,500-mile journey, it creates one of the biggest river deltas on the planet.

Hippos, elephants, lions and buffalo are drawn to the Zambezi's wild waters, which grow from a tiny trickle in Zambia to the thundering Victoria Falls.

The Danube River, which stretches from the Alps to the Black Sea, supports a surprising range of wildlife and is coping with years of human impact. (2 of 3)

The Yukon River boasts one of the longest salmon runs in the world; from musk ox to ice bears, there is a rich variety of life that call this frozen river home.