“These are precious animals,” said David Ayares of Revivicor Inc., who spent decades learning to clone pigs with just the right genetic changes to allow those first audacious experiment ...

The scientific breakthrough, announced on this day in 1997, proved that geneticists could clone an adult mammal, giving rise ...

The virus-free pigs could get us a step closer to transplanting pig organs into humans, something that's been a challenge in the past. Next, the company may have to make some more tweaks to make ...