A picture shows a close up of a screen displaying a micro-injection of embryo stem cells into a muse embryo to set a genetically modified line, on February 9, 2012, at the Centre d'Immunologie de Marseille-Luminy (CIML), in the transgenesis laboratory which is in charge of creating animals in order to understand how genes work, in Marseille, southern France. (Photo credit should read ANNE-CHRISTINE POUJOULAT/AFP/Getty Images)
