Also known as "The Best of Seven Worlds, One Planet". The most spectacular moments from the Seven Worlds, One Planet series that highlights the incredible rich and wonderful diversity of life found on our planets seven unique continents. Millions of years ago huge forces ripped apart the Earth's crust, creating seven distinct continents. Over time, each one developed its own remarkable wildlife. We see the extraordinary variety of life found in South America and visit the largest of all continents - Asia, so big it still hides rarely seen creatures. We explore the cities of Europe, full of surprises, and the wilds of Africa, home to the greatest gatherings of animals. We travel to the searing heat of Australia with its weird and wonderful wildlife, and witness the pioneering animals of North America that make the most of every opportunity. Finally, we venture to the frozen wilderness of Antarctica were, on the most hostile continent of all, life manages to thrive against the odds. And we reveal how today the biggest challenge faced by wildlife is the impact of human activity on all seven of our incredible continents.
Siberian tigers are the largest of all cats. In historic times, the tiger's range was vast, covering much of Asia. Over the last century, they've experienced an almost total population crash, and at least 97% of those tigers have gone.