See how the Earth works in a whole new way as this fascinating series unpicks the puzzles of our planet, piece by piece. Earth is a collection of worlds within worlds, each one a self-contained ecosystem bursting with life. These microworlds depend on an intricate web of relationships and natural forces that make each one unique. Travelling across the world, this stunning series investigates microworlds like the islands of Galapagos, the grasslands of the Serengeti, Svalbard in the Arctic Circle, the Amazon rainforest and the desert of Australia's Red Centre to discover the key to life in each of them. It also reveals what can happen to these ecosystems - and indeed our planet - if something interferes with their delicate balance.