Dedicated to the memory of Rosalind Elsie Franklin (1920–1958), chemist and X-ray crystallographer, who among many other accomplishments contributed significantly to the discovery of the double-helix structure of DNA. Having died of ovarian cancer at age 37, Franklin was ineligible to share the Nobel Prize in Physiology or Medicine awarded to James Watson, Francis Crick, and Maurice Wilkins in 1962, since Nobel Prizes are not given posthumously.