Clones from specialized cells.
while working at Grenada Genetics, Steen Willadsen cloned a cow using differentiated, one week old embryo cells. The work proved
that the genetic information of a cell did not diminish as a cell
specialized and that DNA could return to its original
state. Willadsen never officially published his results,
but the work was a strong influence in Ian Wilmut's
decision to attempt to clone from adult cells, which he
accomplished in the famous 1996 birth