When Sir David Attenborough was in his mid-eighties, many thought he had retired; instead, he was embarking on a seven-year journey, revisiting some of the most astonishing landscapes and creatures on the planet.

From the Galapagos Islands to the deepest caves in Borneo; David's adventures across the globe.

From the ancient tropics of China to the depths of the Great Barrier Reef; David's adventure across the globe.

From the idyllic shores of the Galapagos to the underwater worlds of the Great Barrier Reef, David Attenborough seeks to understand how the natural world has thrived in what might otherwise seem like impossible environments.