Researchers have produced two monkeys with a procedure similar to that used to clone a sheep in Scotland, a development expected to help research into AIDS, alcoholism, depression and other illnesses.

Gleaning stem cells from cloned monkey embryos, as a team of Oregon researchers has done, is an impressive step. But it probably won't lead to medical treatments anytime soon. One hurdle is ethical ...

Not too shabby, humans. New research shows that certain primate stem cells have pluripotency superior to some types derived from mice. The study, published in Nature, maps how pluripotency differs ...