
Tracy, a transgenic sheep
1990-1997
1990-1997
1986
1998
circa 2010
1914-1924
1914-1924
1998
1940-1945
1977
1940-1944
1943
1942
1993
1988
1935
1942-1945
2009
1955-1975
1979-1985
1993
1998
1995
1996
2017
2002
1992
1944
1976
1915-09-18
2000
1999
1990s
1990s
1970-2000
2009-2010
1943
1999
1993
1999