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Sketch of the DNA Double Helix by Francis Crick
The iconic image of the double helix--the twisted ladder that carries the codes for earth's huge variety of life forms–goes back to 1953 and the homemade metal model created by the British scientist Francis Crick and his American collaborator, James Watson. Determined to solve the puzzle posed by the research evidence at the time, they obtained new insights by visualizing the structure of the complex molecule through a physical model. This pencil sketch of DNA was made by Crick and forms part of the extensive Crick Archive at ...
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