Trek to the planet's quickly melting poles, where animals are giving scientists clues about our future existence. Learn how the movements of polar bears, penguins, and other arctic creatures could help humans map (and prevent) global warming.

Find out why islands are like mini-Earths where evolution happens before your eyes. Journey from the Galápagos to Antarctica to see how sea lions, finches, crickets, monkeys and other wildlife are finding surprising solutions to climatic problems.