Era
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1865-1877
2
1866-
2
1867-1957
2
1873-1947
2
1876-1916
2
1877-1964
2
1892-1942
2
1896-1948
2
1896-1966
2
1897-1901
2
1897-1948
2
1899-1950
2
1900-1963
2
1900-2099
2
1908-1988
2
1910-
2
1915-1979
2
1918-1945
2
1920-2007
2
1933-2023
2
1935-
2
1948-
2
1950-
2
1952-
2
Cenozoic
2
From 2 to 65 million years ago
2
From 230 to 280 million years ago
2
Mesozoic
2
Pleistocene
2
Revolution, 1835-1836
2
Since 1865
2
To 1500
2
To 1899
2
Triassic
2
b. 1866
2
ca. 1758-ca. 1839
2
-1804
1
-1903
1
1744-1811
1
1750-1815
1
1752-1818
1
1763-1848
1
1764-1820
1
1771-1870
1
1777-1849
1
1778-1838
1
1782-1858
1
1782-1867
1
1783-1815
1
1783-1856
1
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