Commentary In January, it was announced that David Bennett, 57, had received the first heart transplant, from a genetically modified pig heart, and so far, seemed to be tolerating the transplant well. This area of transplant medicine, xenotransplantation, is the practice of transplanting organs, tissues, or cells into a human from a non-human species. It has long been studied as, the reality is, there aren’t enough organs available, from either cadavers or live donors, to meet the demand. Currently, in the United States, we have over 100,000 people waiting on an organ donor list. Approximately 17 of those people will die each day because an organ doesn’t become available. Wait times vary but are typically between three and five years. Kidneys are most in demand, with livers coming in second. The ethics of organ donation and organ transplantation have long been established. The United Network for Organ Sharing, UNOS, is …