The Double Helix and the Data Behind It
Watson and Crick published DNA's structure in 1953, built partly on Rosalind Franklin's crucial work and her scant credit
Quick facts
- Structure published
- 1953, in Nature
- Modelers
- James Watson and Francis Crick
- Key experimental data
- Rosalind Franklin's X-ray crystallography
- Disputed point
- Franklin's credit and how her data was shared
What happened
The discovery in 1953 of the double helix, the twisted-ladder structure of DNA, by James Watson and Francis Crick marked a turning point in biology. Their model showed how the molecule that carries heredity could store information and copy itself. The discovery rested substantially on the experimental work of Rosalind Franklin at King's College London. Her X-ray evidence demonstrated that the two sugar-phosphate backbones lay on the outside of the molecule, confirmed that the backbones formed a double helix, and revealed to Crick that they ran in opposite directions. Her superb experimental work proved essential to the discovery, yet Watson and Crick gave her scant acknowledgment, and her data was shared with them, without her knowledge, through her colleague Maurice Wilkins and Max Perutz. How to weigh her role remains actively debated; recent scholarship argues she is best remembered as an equal contributor rather than only as a wronged figure.
Why it matters
The double helix is the foundation of molecular biology and genetics, making it possible to understand mutation, inheritance, and eventually to read and edit the genome. The story is also the field's most examined credit dispute, a case study in how scientific recognition is assigned, whose data counts, and how the historical record gets revised as new evidence and fairer readings emerge.
How we know
Watson and Crick's 1953 model was published in Nature, and Franklin's contribution is documented by her own X-ray work and correspondence and re-examined in institutional histories and recent scholarship on the discovery.
Sources
- U.S. National Library of Medicine (Profiles in Science). The Discovery of the Double Helix, 1951-1953 · Reputable sourceprofiles.nlm.nih.gov · The domain "profiles.nlm.nih.gov" is on our Reputable source registry. · Link is live and its text matches the event's key terms (Jul 2026)
- Science Museum (London) blog. Rosalind Franklin's role revealed on the 70th anniversary of the DNA double helix breakthrough · Reputable sourceblog.sciencemuseum.org.uk · The domain "blog.sciencemuseum.org.uk" is on our Reputable source registry. · Link is live and its text matches the event's key terms (Jul 2026)
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