Rosalind Franklin was the first scientist to work with what?

Rosalind Franklin was the first scientist to work extensively with X-ray crystallography in the study of DNA. Her pioneering work produced critical images, particularly the famous Photo 51, which provided crucial evidence of the double helix structure of DNA. Despite her significant contributions, her work was largely unrecognized during her lifetime, especially compared to her male counterparts. Franklin also conducted important research in virology and coal and carbon science.