Human cloning just took a big step forward.
Scientists can now take genetic material from a human cell, put it into a donor egg cell and make the egg grow into an embryo.
Experimenting on human embryos always sparks controversy. But this could be an important source of stem cells, which may help cure debilitating conditions.
Ideally we'd get stem cells from less controversial sources, and lots of scientists are working on that. But for now I think we should grasp the potential of this new discovery.