 For "The Life of Mammals" (2002), low-light and infrared cameras were deployed to reveal the behaviour of nocturnal mammals.The series contains a number of memorable two shots of Attenborough and his subjects, which included chimpanzees, a blue whale and a grizzly bear.Advances in macro photography made it possible to capture natural behaviour of very small creatures for the first time, and in 2005, "Life in the Undergrowth" introduced audiences to the world of invertebrates.