![](https://coimages.sciencemuseumgroup.org.uk/17/987/large_thumbnail_1999_0276__0004_.jpg)
Bioengineered obese mouse, Aberdeen, Scotland, 1998
1998
1998
1983
1943
1880-1920
1931-1970
1851-1900
1870-1925
1871-1930
1871-1930
1871-1930
1901-1940
1850-1860
circa 1980
1925-1927
1882-1908
1867
1898
1926
1882-1908
1936
1925-1927
1925-1927
1925
1901-1930
1881-1940
1901-1930
1900-1960
1877
1865-1888
1871-1930
1871-1930
1901-1930
1950-1970
1865-1920
1907
1925-1927
1925-1927
1862
1961
1871-1900
1910-1919
1850-1870
1925-1927
circa 1940s