British scientists say they have successfully cloned a human embryo - the country's first. The Newcastle University team took eggs from 11 women, removed the genetic material and replaced it with DNA from embryonic stem cells. Three of the resultant clones lived and grew in the laboratory for three days and one survived for five days. The critical factor for success appeared to be how quickly the egg was collected and manipulated. Patient-specific stem cell first Any longer than an hour and there was no success, Professor Alison Murdoch and colleagues found. The clone that lasted for five days had...