Dr. Robert P. LanzaCloning for research. Cloning is the future of medicine, according to Dr. Robert P. Lanza of Advanced Cell Technology.

Steve DasbachCloning rabbit-people? There are ethical concerns about mixing rabbit and human DNA - despite the possible medical benefits.

Dr. BosselierCloning for immortality. Critics of Clonaid say they're nuts. Founders of Clonaid say they're humanity's last chance.

Dr. ZavosCloning for babies. Dr. Zavos says he wants to clone children to help infertile couples. Charity or irresponsibility?

Rev. PeacockeCloning mules. After 218 tries, researchers proved stubborn enough. "Idaho Gem," a cloned mule, was born early this year. More