Wolverine's Mutant Healing Factor Discovered!
"Miracle Mice" grow back limbs, organs
Scientists have created a "miracle mouse" that can regenerate amputated limbs or badly damaged organs, making it able to recover from injuries that would kill or permanently disable normal animals.
The experimental animal is unique among mammals in its ability to regrow its heart, toes, joints and tail.
The researchers have also found that when cells from the test mouse are injected into ordinary mice, they too acquire the ability to regenerate. (emphasis mine)