On a farm in the southern US state of Virginia, David Ayares and his research teams are breeding genetically modified pigs to transplant their organs into human patients. Dave Ayares, President ...

After years of research into xenotransplantation, the field is at a turning point—yet risks and ethical issues remain ...

German scientists plan to clone and then breed this year genetically modified pigs to serve as heart donors for humans, based on a simpler version of a US-engineered animal used last month in the ...