Cloning of mammals

As late as 1984, scientists David McGrath and Davor Solter wrote in the journal Science, The cloning of mammals by simple nuclear transfer is biologically impossible. That assertion has been proven false, and since that date sheep, mice, cows, monkeys—a virtual menagerie of mammals—have been cloned. A moratorium on the cloning of humans has been enforced by law and by intimidation. Yet the announcement of the first true human clone— from somatic cell and egg cell fusion to embryonic birth—is only a question of time. Whether it occurs in a federal laboratory or in a private clinic, it will happen. 

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