person1945–1958

Rosalind Franklin

Disciplines:

Summary

British chemist and X-ray crystallographer whose X-ray diffraction images of DNA (particularly Photo 51) provided the crucial structural evidence that Watson and Crick used to build their double helix model — without receiving credit until after her death.

Core Contribution

Produced the definitive X-ray evidence for DNA's helical structure — Franklin's Photo 51 (obtained without her knowledge or consent) provided Watson and Crick with the key structural measurements that confirmed the double helix; she was denied credit due to institutional sexism and died of cancer in 1958 before the Nobel Prize was awarded.

Key Spikes & Highlights

Photo 51 (Franklin's defining moment: she captured the clearest X-ray diffraction image of DNA's B-form in 1952, which provided the definitive structural evidence for the double helix — but Wilkins showed it to Watson without her permission, and Watson-Crick published their model without acknowledging her contribution; the photo is now the most famous stolen data in science history)

Notable Works & Achievements

Molecular Configuration in Sodium Thymonucleate

Tobacco Mosaic Virus structure papers

Historical Influences

X-ray crystallography tradition W.T. Astbury

Intellectual Lineage

London Newnham College Cambridge Paris King's College London Birkbeck College

Contemporaries & Peers

James Watson Francis Crick Maurice Wilkins

Minds Influenced

DNA structure discovery Gender equity in science discourse Lenny's Podcast

Intellectual Posterity

Photo 51 Rosalind Franklin as stolen credit DNA structure contributions

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