Rosalind Elsie Franklin (25 July 1920 to 16 April 1958) was an English biophysicist, physicist, chemist, biologist and X ray crystallographer who made contributions to the understanding of the fine molecular structures of DNA, RNA, viruses according to wiki. Franklin is best known for her work on the X-ray diffraction images of DNA. Her data, according to Francis Crick, was a part of the data use..