Era
- 20th century 153 results
- 19th century 127 results
- 18th century 41 results
- 21st century 28 results
- 17th century 25 results
- Paleozoic 24 results
- 1975- 19 results
- 1834-1896 18 results
- 16th century 16 results
- 1834-1907 16 results
- Quaternary 16 results
- 1728-1779 15 results
- Mesozoic 13 results
- 1822-1887 11 results
- 1945- 11 results
- Cretaceous 11 results
- Middle English, 1100-1500 11 results
- Precambrian 11 results
- 1840-1876 10 results
- To 1500 10 results
- 1819-1903 9 results
- Devonian 9 results
- Primitive and early church, ca. 30-600 9 results
- Carboniferous 8 results
- Cenozoic 8 results
- Early modern, 1500-1700 8 results
- Jurassic 8 results
- 1809-1892 7 results
- Ordovician 7 results
- Permian 7 results
- To 1893 7 results
- 1564-1616 6 results
- 1871-1937 6 results
- Early modern and Elizabethan, 1500-1600 6 results
- Middle Ages, 600-1500 6 results
- Revolution, 1775-1783 6 results
- Silurian 6 results
- Tertiary 6 results
- To 1840 6 results
- Triassic 6 results
- 1709-1784 5 results
- 1760-1789 5 results
- 1817-1911 5 results
- 1818-1883 5 results
- 1832-1902 5 results
- 1837-1901 5 results
- 1918- 5 results
- 1918-1945 5 results
- 1970- 5 results
- 1984- 5 results more…