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

Researchers implanted a mix of human and pig tooth cells in mini pig jaws. This was not a pig used in the study. © Freepik When you lose a baby tooth, an adult one ...

and it was observed that pigs had grown tooth-like tissue. Photos of the animal’s mouths show their usual larger, sharper, tusk-like canines next to smaller, more human-like tooth structures.