In Sheep's Clothing
Professor Henry T. "Hank" Greely comments on the use and feasibility of animal-human hybrids called chimeras in stem cell research:
Henry T. Greely, a California bioethicist from Stanford University who has been following the issue for years, said some of these concerns are overblown, but some are real.
"I don't know how well we can control that process," he said. "This science is still at a very early stage."