US scientists have, for the first time, made early-stage human embryos by manipulating DNA taken from people's skin cells and then fertilising it with sperm.The technique could overcome infertility due to old age or disease, by using almost any cell in the body as the starting point for life.It could even allow same-sex couples to have a genetically related child.The method requires significant refinement - which could take a decade - before a fertility clinic could even consider using it.Experts said it was an impressive breakthrough, but there needed to be an open discussion with the public about what science...