There was a film in the early 1990's starring Sean Connery as a research scientist who discovers the cure for cancer; medical research continues to advance in it's war with this disease that plagues humanity. Although there are other more awful diseases, this one holds the crown at the moment because of how often it is diagnosed; a cure would bring a sigh of relief everywhere. Whilst we do know about some of the causes of cancer, no-one can predict who, where or when it will be triggered.