AdvertisementIn a major scientific advance, a pig kidney is successfully transplanted into a humanOctober 20, 2021facebookEmailIn this September 2021 photo provided by NYU Langone Health, a surgical team at the hospital in New York examines a pig kidney attached to the body of a deceased recipient for any signs of rejection. The test was a step in the decades-long quest to one day use animal organs for life-saving transplants. (AP)