Nobel Prize winner who found DNA double-helix dies

James Watson became a controversial figure after his repeated offensive comments later in life (Picture: Bloomberg/Getty Images)James D.Watson, the controversial scientist who co-discovered the DNA structure, has died at the age of 97.
The scientist and his two colleagues spotted the twisted-ladder structure of DNA in 1953.
Their discovery ended up revolutionising medicine, criminal forensics, genealogy and ethics.
Watson was just 24 when he made the breakthrough finding, and he became a well-k