as governments everywhere promote it, is therapeutic cloning going to be mothballed before it has produced a single cure?

Only a few days ago an article in the leading journal Nature brought amazing news. A Japanese team at Kyoto University has discovered how to reprogram skin cells so that they “dedifferentiate” into the equivalent of an embryonic stem cell. From this they can be morphed, theoretically, into any cell in the body, a property called pluripotency. It could be the Holy Grail of stem cell science: a technique that is both feasible and unambiguously ethical.

“Neither eggs nor embryos are necessary. I’ve never worked with either,” says Shinya Yamanaka.