Jon Snow travels the world visiting communities where residents are living longer and healthier lives, with lower rates of fatal diseases and extra years of good health in old age.
Channel 4, in common with the other main British stations broadcast on analogue, airs a highly comprehensive range of programming. It was established in 1982 with a specific intention of providing programming to groups of minority interests, not catered for by its competitors, which at the time amounted to only the BBC and ITV.