
Molecular model of penicillin by Dorothy M Crowfoot Hodgkin, England, 1945
1945
1945
1945
1952-3
1830 (original); 1967 (model)
1955; 1830
1938 and 1951
2000-100 BCE
1839 (original); circa 1988 (replica)
1801-1892 (prepared); 1946 (element replaced)
4000-2001 BCE
1903 (original); 1982 (model)
circa 1945
1945
1990-95
1945
1945
circa 1945
1945
1945
1945
1945
1945
1945
1945
circa 3000 BCE
2000 BCE
30-300
2000-1350
2050-1750 BCE
10,000-2,000 BCE
1950-1900
1952-3
1952-3
4000-30 BCE
10000-5000 BCE
1977; 1204-1206
10000-500 BCE
1945
1972-3
1952-3
2500 BCE
2000-1000
1950-1920
1952-3
1945
2000-800
1970-1910
2000-100 BCE
2000-1001 BCE
1971-1900