Seven Worlds, One Planet

Antarctica is a land of survivors enduring the most hostile conditions on Earth. Despite the fact that 98% of the mainland is covered in ice, species from krill and penguins to elephant seals and fin whales have flourished and diversified.

Asia is the largest and most extreme continent on our planet, stretching from the Arctic Circle in the north to the tropical forests on the equator. The animals here face the hottest deserts, tallest jungles and highest mountains found anywhere on Earth.

South America is the most species-rich continent on Earth. From the bone-dry deserts of the Atacama to the lush cloud forests of the Andes, South America is full of the unusual and ingenious.

Australia has been isolated for millions of years after being cast adrift at the time of the dinosaurs. The weird and wonderful animals marooned here are like nowhere else on earth, from kangaroos and cassowaries to tropical fish and sharks.

Europe is a crowded continent transformed by mankind, where extraordinary animals are found in surprising places. Today, just four percent of Europe is protected wilderness, but recent conservation efforts have thrown a lifeline to a lucky few species.

More than any other continent, North America is defined by extreme weather and seasonal change. For animals that live here, this poses great challenges, but for those with a pioneering spirit, it can also offer great rewards.

Africa is home to the greatest wildlife gatherings on Earth. From tropical rainforests and the Serengeti to vast deserts and the Great Rift Valley, Africa's unique animals have managed to thrive despite the increasing threat from human activity.