Oct. 10 (UPI) -- John Gurdon, considered the godfather of cloning and who shared the Nobel Prize in physiology and medicine in 2012, has died at the age of 92. The Gurdon Institute said he died Tuesday. No cause of death was given. "John was a visionary in the field of developmental biology whose pioneering work on nuclear transfer in frogs addressed one of the most fundamental questions in biology -- whether genetic information is retained or lost during development -- and paved the way for