Sir Alexander Fleming, FRSE, FRS, FRCS(Eng)
Born August 6, 1881
Died Mar 11, 1955 (age 73)
Scottish biologist, pharmacologist who shared the 1945 Nobel Prize for helping to discover the antibiotic substance penicillin in 1928
..he discovered it accidentally as mould in his petri dish, which he left unwashed during a vacation
His discovery marked the start of modes antibiotics, which changed the medical world forever