Meet the most scientifically studied people in the world. A group of 1,037 New Zealanders born in one city have been followed since their births in 1972. Members are now dispersed around the globe but 96% of the original group are still taking part - an extraordinary achievement in such a long running study. This series follows the fascinating study and information it has provided in almost every field of medical and social development including respiratory and cardiovascular health, addictions, obesity, sexual health, cognitive neuroscience, psychiatry, genetics and criminology and most interestingly the effects of nature and nurture on health and behaviour.