Molecular model of penicillin by Dorothy M Crowfoot Hodgkin, England, 1945
1945
1945
1839 (original); circa 1988 (replica)
1990-96
1938 and 1951
1903 (original); 1982 (model)
1947
1945
1947
1946
2000-100 BCE
1946
4000-2001 BCE
1955; 1830
1945
1946
circa 1945
1945-1946
1945
1947
1946
1946
1945
1946
1934; 1947
1946
1947
1947
circa 1946
circa 1947
1952-3
1990-95
1945
1830 (original); 1967 (model)
1947
1947
1945
1945-1947
1960-1979
1879 (1956)
1945
2050-1750 BCE
1935; 1958
1947
1946
1946; 1946
1888; 1984
1945
1947
1962-05
1976; 1776