Whose discovery was the DNA double helix?

In 1953 James Watson and Francis Crick, working at Cambridge, published a model showing that DNA is a double helix, two strands twisted around each other like a spiral ladder. Their breakthrough depended heavily on X-ray diffraction images taken by Rosalind Franklin, especially the famous Photo 51, along with data from Maurice Wilkins. The structure elegantly explained how genetic information could be copied and passed on, since each strand can serve as a template for a new one. Watson, Crick, and Wilkins shared a Nobel Prize in 1962, but Franklin had died in 1958 and could not be included. Her contribution is now widely recognised as essential.