Era
20th century
171
19th century
89
1919-1972
22
18th century
21
1895-1948
12
21st century
12
1918-2002
11
1931-1995
11
1925-2015
10
1945-
10
1872-1929
8
1877-1927
8
1914-1999
8
Quaternary
8
To 1500
8
17th century
7
1901-1978
7
1928-1989
7
1728-1779
6
1810-1891
6
1881-1965
6
1890-1950
6
1906-1982
6
1914-1981
6
1951-
6
1960-
6
1966-
6
1971-
6
Cretaceous
6
16th century
5
1881-1931
5
1886-1961
5
1887-1953
5
1903-1941
5
1930-2010
5
1935-2020
5
1941-
5
1942-
5
1943-
5
1948-
5
1956-
5
1958-
5
Holocene
5
Medieval, 500-1500
5
1820-1892
4
1874-1926
4
1878-1946
4
1879-1958
4
1910-1974
4
1931-
4
more ...