Ian Wilmut, the researcher who cloned Dolly the sheep back in 1996, suggests that the way around the ethical and legal issues of using human embryonic stem cells is to grow stem cells up from animal eggs. When a nucleus from a person's cell is injected into an animal egg (whose own nucleus has been removed), a bunch of human stem cells begin to grow, he explains. This only occurs, though, about 12 percent of the time and has the added problem of using an animal egg to produce human tissue.
To Get Around One Issue, Try Out Another
Jun 13, 2007