Life on Our PlanetA legacy defining book from Sir David Attenborough, reflecting on his life's work, the dramatic changes to the planet he has witnessed, and what we can do to make a better future See the world. Then make it better. I am David Attenborough. At time of writing, I am 93 years old. I've had an extraordinary life. It's only now that I appreciate how extraordinary. As a young man, I felt I was out there in the wild, experiencing the untouched natural world