Molecular model of penicillin by Dorothy M Crowfoot Hodgkin, England, 1945
1945
1945
1830 (original); 1967 (model)
1839 (original); circa 1988 (replica)
1990-96
1938 and 1951
1945
1903 (original); 1982 (model)
2000-100 BCE
4000-2001 BCE
1945
1955; 1830
circa 1945
1945
1945
1934; 1947
1952-3
1990-95
1945
1945
1960-1979
6000-5000BCE
1879 (1956)
1798 (original); 1977 (model)
1945
2050-1750 BCE
1935; 1958
1888; 1984
1945
1962-05
1945
1976; 1776
circa 1945
8500-2000 BCE
2000-1001 BCE
1701-1800; 1982
1991-1783 BCE
circa 3000 BCE
1901-1930; 1963
10000-5001 BCE
2000-100 BCE
1501-1600; 1972
1956-09
1920-1923; 1963
8500-2000 BCE
2800 BCE
3000-2500 BCE
1988 (model); 1752 (original)
2050-1750 BCE
1801-1892 (prepared); 1946 (element replaced)
1975-1978