Researchers have reported growing hearts containing human cells in pig embryos for the first time. The embryos survived for 21 days, and in that time their tiny hearts started beating. The findings ...

Part lion, part goat, part serpent, the Chimera was a terrifying, fire-breathing monster capable of decimating cities, according to Greek mythology. Today, the term “chimera” has a much more ...

The transplanted portion of the genetically modified pig liver was removed after 38 days, and the patient, who had advanced liver cancer and cirrhosis, died several months later. By Roni Caryn Rabin ...

A look at the human-pig hybrid experiment and its implications.