BioTech TImeline By WeMv5 Oct 17, 1885 First-ever demonstration of artificial embryo twinning Nov 27, 1902 Artificial embryo twinning in a vertebrate Apr 20, 1928 The cell nucleus controls embryonic development Sep 29, 1952 First successful nuclear transfer Jan 15, 1958 Nuclear transfer from a differentiated cell May 6, 1975 First mammalian embryo created by nuclear transfer Aug 8, 1984 First mammal created by nuclear transfer Jun 1, 2001 Endangered animals cloned by somatic cell nuclear transfer Oct 31, 2007 Primate embryonic stem cells created by somatic cell nuclear transfer Dec 9, 2013 Human embryonic stem cells created by somatic cell nuclear transfer