February 28th
1704 - Birth of Louis Godin, French astronomer
1857 - Death of André Dumont, Belgian geologist
1878 - Birth of Pierre Fatou, French mathematician
1896 - Birth of Philip Showalter Hench, American physician, Nobel laureate
1901 - Birth of Linus Pauling, American chemist, Nobel laureate
1915 - Birth of Peter Medawar, Brazilian-born scientist, Nobel laureate
1929 - Death of Clemens von Pirquet, Austrian physician
1930 - Birth of Leon Neil Cooper, American physicist, Nobel laureate
1935 - Nylon is discovered by Wallace Carothers.
1936 - Death of Charles Nicolle, French bacteriologist, recipient of the Nobel Prize in Physiology or Medicine
1939 - Birth of Daniel C. Tsui, Chinese-born physicist, Nobel laureate
1948 - Birth of Steven Chu, American physicist, Nobel laureate
1953 - James D. Watson and Francis Crick announce to friends that they have determined the chemical structure of DNA