June 8th
1916 Francis H. C. Crick, who determined structure of deoxyribonucleic acid (DNA) and won the Nobel Prize in Medicine (1962) with James D. Watson and Maurice H. F. Wilkins for their discoveries concerning the molecular structure of nuclear acids and its significance for information transfer in living material, was born.
1940 Edwin M. McMillan and Philip Abelson announced discovery of neptunium (Np, 93).