For more than 25 years, researchers from the Serengeti Lion Project, . now run by Dr Craig Packer, have recorded the details of the life and death of every lion in Tanzania’s Ngorongoro Crater. Equivalent to a century of human history, their records reveal the decline, fall and rise of dynasties. Owen Newman filmed the life of one of these prides over seven months for The Natural World series. The resulting film, Lions - Pride in Peril, will be shown on BBC2 on 18 Feb 1966.