A Brave New World of Human Cloning

Sixty years ago, Nobel Prize-winning geneticist Joshua Lederberg shocked the world with the first serious scientific paper detailing the feasibility of human cloning. Four decades later, a sheep named Dolly -- the first large mammal ever cloned -- brought his prediction a step closer to becoming a reality. Now the realization of Lederberg's proposal seems quite plausible, even if the technology needed to artificially produce humans may not emerge for another few decades....