Stem cells: war over?

"...He decided in the end to go ahead, reasoning that the work was important and that he was using embryos from fertility clinics that would have been destroyed otherwise. The couples whose sperm and eggs were used to create the embryos had said they no longer wanted them.

Nonetheless, Thomson said, announcing that he had obtained human embryonic stem cells was "scary," adding, "It was not known how it would be received."

But he never anticipated the extent and rancor of the ensuing debate....