Molecular model of penicillin by Dorothy M Crowfoot Hodgkin, England, 1945
1945
1945
1830 (original); 1967 (model)
1946
1839 (original); circa 1988 (replica)
1990-96
1938 and 1951
1945
1947
1946
1903 (original); 1982 (model)
1946
2000-100 BCE
4000-2001 BCE
1945
1955; 1830
1946
1945-1946
circa 1945
1945
1947
1946
1945
1934; 1947
1946
1947
1947
circa 1946
circa 1947
1952-3
1990-95
1945
1947
1947
1945
1945-1947
1960-1979
6000-5000BCE
1879 (1956)
1798 (original); 1977 (model)
1945
2050-1750 BCE
1947
1935; 1958
1946
1946; 1946
1888; 1984
1945
1962-05
1945
1947