BOSTON -- Several animal species have already been cloned into new adults. Many researchers felt sure the first primitive human embryo would soon follow. Yet the achievement, announced by Advanced ...

Chinese scientists clone monkeys using the same technique that produced Dolly the sheep two decades ago, breaking a technical barrier that could open the door to copying humans.

Cloning human organs has sparked intense interest and debate in recent years, drawing attention from scientific, ethical, and medical communities. The potential for cloning human organs presents ...