A personal insight from the world's favourite naturalist into Darwin's theory of evolution. This special documentary was made to celebrate the 200th anniversary of the birth of Charles Darwin and the 150th anniversary of the publication of 'On The Origin Of Species'. Darwin's great insight - that life has evolved over millions of years by natural selection - has been the cornerstone of all David Attenborough's natural history series. In this documentary, he takes us on a deeply personal journey which reflects his own life and the way he came to understand Darwin's theory. By visiting Darwin's home and tracing the voyage of the Beagle across the world, David Attenborough explains how the great naturalist revolutionised our understanding of the natural world. New and spectacular wildlife footage of fascinating animal behaviour brings the theory to life and fresh evidence and new discoveries reveal how Darwin's work is endorsed and expounded by today's cutting-edge science. A labour of love for a man who has been at the forefront of natural history programming for decades, this fascinating programme explores why Darwin's theory is more important now than ever before.