Era
1945-
26
21st century
25
20th century
18
19th century
9
1945-1989
6
1989-
4
2000-
4
2009-
4
17th century
3
1949-
3
1991-
3
1254-1323?
2
18th century
2
1945-1953
2
1993-2001
2
1304-1377
1
1564-1616
1
1644-1912
1
16th century
1
1823-1900
1
1884-1960
1
1888-1953
1
1893-1971
1
1898-
1
1917-1948
1
1932-2018
1
1945-1975
1
1945-1991
1
1949-1976
1
1961-1969
1
1969
1
1976-2000
1
1976-2002
1
1982-
1
1986-
1
1988-2000
1
1988-2002
1
2001-
1
2002-
1
476-1492
1
Cenozoic
1
Cretaceous
1
Neogene
1
To 622
1
active 16th century
1