MADISON, WI - MARCH 10:  Kejin Hu, research associate, looks at a colony of human embryonic stem cells under a microscope at Wisconsin National Primate Research Center at University Wisconsin-Madison March 10, 2009 in Madison, Wisconsin.  On March 9, 2009 President Barack Obama signed an order reversing the Bush administration's limits on human embryonic stem cell research. Scientists at the University Wisconsin-Madison, who were the first to experiment in finding cures to neurological and muscular diseases through stem cell research, are now hoping to receive federal funding to aid in their work. (Photo by Darren Hauck/Getty Images)