Planeta Viviente
The success of "Life on Earth" prompted the BBC to consider a follow-up, and five years later, "The Living Planet" was screened. This time, Attenborough built his series around the theme of ecology, the adaptations of living things to their environment. It was another critical and commercial success, generating huge international sales for the BBC. In 1990, "The Trials of Life" completed the original Life trilogy, looking at animal behaviour through the different stages of life. The series drew strong reactions from the viewing public for its sequences of killer whales hunting sea lions on a Patagonian beach and chimpanzees hunting and violently killing a colobus monkey.