Travel to the ends of the Earth, where a drama is unfolding in real time. Meet animals, from tiny butterflies to huge humpback whales, that are acting as sentinels, adapting their behaviour, and helping us unlock the riddles of our changing planet.

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.

Go to extremes, from the Sahara to the outback, where animals are teaching us how to survive in our heating world. Shelter in caves with chimps, see camels sip salt water, and listen as zebra finches sing to their eggs to make their chicks smaller.

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.

Explore one of Earth’s most vital but overlooked habitats and learn how grasslands could slow climate change by soaking up more carbon than forests do. Meet key species, such as bison and pumas, that could restore this resource and heal our planet.