Aikakausi
20th century
25
1951-1980
12
Cretaceous
11
1951-
9
1981-
8
1900-1999
7
Since 1951
7
1902-1988
6
1905-1982
4
Since 1981
4
1900 - 1999
3
21st century
3
1800-1899
2
1900-2099
2
1951 - 1980
2
1977-
2
19th century
2
From 65 to 140 million years ago
2
Jurassic
2
Mesozoic
2
Miocene
2
Tertiary
2
To 1519
2
1547-1616
1
1713-1784
1
1753-1811
1
1858-1929
1
1886-1957
1
1893-1963
1
18th century
1
1902-
1
1909
1
1926-
1
1931-
1
1940
1
1946-
1
1950
1
1951
1
1951-1981
1
1952
1
1960-1969
1
1962
1
1983
1
1991
1
20e siècle
1
Eocene
1
From 140 to 190 million years ago
1
From 2 to 65 million years ago
1
Modern period, 1500-
1
Siglo XIX
1
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