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.

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.