Maurice Hugh Frederick Wilkins (15 December 1916 – 5 October 2004) was a New Zealand-born English physicist and molecular biologist, and Nobel Laureate whose research contributed to the scientific understanding of phosphorescence, isotope separation, optical microscopy and X-ray diffraction, and to the development of radar. He is best known for his work at King's College, London on the structure of DNA which falls into three distinct phases. The first was in 1948–50 where his initial studies produced the first clear X-ray images of DNA which he presented at a conference in Naples in 1951 attended by James Watson. During the second phase of work (1951–52) he produced clear "B form" "X" shaped images from squid sperm which he sent to James Watson and Francis Crick causing Watson to write "Wilkins... has obtained extremely excellent X-ray diffraction photographs" [of DNA].