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James Watson: DNA pioneer dies at 97
Watson co-discover the double-helix structure of DNA, but his reputation was later damaged by his comments on race and sex.
"Nobel Prize-winning American scientist James Watson, one of the co-discoverers of the structure of DNA, has died aged 97.
In one of the greatest breakthroughs of the 20th century, he identified the double-helix structure of DNA in 1953 alongside a British scientist, Francis Crick, setting the stage for rapid advances in molecular biology.
But his reputation and standing were badly hurt by his comments on race and sex. In a TV programme, he made a reference to a disputed view that genes cause differences between black and white people on IQ tests.
Watson shared the Nobel in 1962 with Maurice Wilkins and Crick for the DNA's double helix structure discovery.
"We have discovered the secret of life," they said at the time.