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<\/p>\nUS scientist James Watson, who co-discovered the double-helix shape of DNA, has died aged 97.<\/p>\n
The Chicago-born DNA pioneer was just 24 when he made the breakthrough discovery, which cemented his place as a distinguished scientist for decades.<\/p>\n
The discovery turned him into a legendary figure, but later in life he faced condemnation for offensive remarks, including saying black people are less intelligent than white people.<\/p>\n
Watson shared the 1962 Nobel Prize with Francis Crick and Maurice Wilkins for discovering that deoxyribonucleic acid, or DNA, is a double helix, consisting of two strands that coil around each other to create what resembles a long, gently twisting ladder.<\/p>\n
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Image:
\n James Watson. Pic: AP<\/p>\n
That discovery revealed how genetic information is stored and how cells replicate their DNA during division, a process that begins with the two DNA strands separating like a zipper.<\/p>\n
Even outside the scientific community, the double helix became an instantly recognizable emblem of science, appearing in works by artists like Salvador Dali and even on a British postage stamp.<\/p>\n
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Image:
\n A model of a DNA molecule. Pic: AP<\/p>\n
The discovery paved the way for modern advances, including genetic engineering, gene therapy to treat diseases, identifying individuals through DNA, and mapping family histories.<\/p>\n
At the same time, it has sparked ethical debates over whether it is appropriate to alter the body’s genetic blueprint for cosmetic purposes or in ways that could be inherited by future generations.<\/p>\n
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Image:
\n Queen Elizabeth II meets Sir Paul Nurse and James Watson. Pic: AP<\/p>\n
“There was no way we could have foreseen the explosive impact of the double helix on science and society,” Watson once wrote.<\/p>\n
Watson never achieved another laboratory breakthrough of the same magnitude.<\/p>\n
However, in the years that followed, he authored influential textbooks and a best-selling memoir; helped guide the project to map the human genome; mentored promising young scientists; and leveraged his reputation and connections to shape science policy.<\/p>\n
Complicated legacy<\/p>\n
Watson became the focus of criticism in 2007, when The Sunday Times Magazine of London quoted him as saying he was “inherently gloomy about the prospect of Africa” because “all our social policies are based on the fact that their intelligence is the same as ours – where all the testing says not really”.<\/p>\n
He said that while he hopes everyone is equal, “people who have to deal with black employees find this is not true”.<\/p>\n
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Image:
\n Pic: Reuters<\/p>\n