Genetically modified pig heart

Devid Bennett, a US man becomes world's first person to have a genetically modified pig heart. The seven hour long surgery was conducted at University of Maryland Medical Centre, in US. Suffering from a terminal hert disease, prior to the surgery Bennett said, "It was either die or do transplant situation." Although, the successful surgery gave a life span to 57-year-old Bennett, survival chances is uncertain, said doctors.