Date: Around 1993
Can a human be cloned? How far are we from doing it?
There is some debate as to whether it will ever be possible. The
reason is that most specialized cell (ie. skin, hair, heart . . .) may not
have all the genetic information necessary to form a complete person. At
least in some tissues, not only is unexpressed genetic information
deactivated, it may also be taken out of that cells genome. My suspicion is
that we are at least several decades from cloning humans due to the technical
difficulty and because so much more needs to be known about fetal development.
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Update: June 2012