Sir David Attenborough has been at the forefront of natural history film making for over half a century, witnessing an unparalleled period of change in our planet's history. In this unique and important series he delivers his testimony in a trio of spectacular films, focusing on three areas which have transformed most profoundly over his career: film making, science and the environment. During his extraordinary career he has seen, first-hand, more of the natural world than anyone else, and witnessed how our remarkable planet has changed more rapidly and extensively than ever before.