Analysis of information sources in references of the Wikipedia article "Hans Driesch" in English language version.
. . . the popular meaning of the term 'clone' is an identical copy that has been created by some conscious design. Under this definition, the first artificially created clone was made in 1885 . . . [Footnote:] Depending on the definition used, one could argue that the experiments carried out by Hans Driesch and Hans Spemmann were not instances of true cloning, but artificial twinning.
