Synopsis: 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 episodes, focusing on three areas which have transformed most profoundly over his career: film making, science and the environment. During his extraordinary lifetime 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.