The sequel to his pioneering natural history series Life on Earth, The Living Planet was a study of the ways in which living organisms, including humans, adapt to their environments. Each of the 12 episodes featured a different environment.
One new piece of equipment used in the series was a scuba diving suit with a large fully-enclosed faceplate, allowing Attenborough to speak (and be seen) underwater.
There was an accompanying book, and the series is available on DVD.