DNA's double helix was built on stolen X-ray data

When James Watson and Francis Crick published the structure of DNA in April 1953, they had seen, without her knowledge, X-ray diffraction image 'Photo 51' taken by Rosalind Franklin. Franklin's meticulous crystallography provided the key measurements that allowed Watson and Crick to correctly model the double helix. Franklin died in 1958; Watson, Crick, and Wilkins shared the Nobel Prize in 1962 — Nobel Prizes are not awarded posthumously, and Franklin was not mentioned in the acceptance speeches.

Source: Watson & Crick, Nature (April 1953)