Breakthrough in cloned embryos poses ethical concerns

A breakthrough in embryonic stem cell research that could lead to people receiving transplants based on their own tissues has been both hailed by scientists, but received a cautious response from ethicists, who have warned it again raises big questions about when life begins.

http://www.theage.com.au/technology/sci-tech/breakthrough-in-cloned-embryos-poses-ethical-concerns-20130516-2jp31.html