Most animals follow a simple path of birth, aging, and death, but the "Immortal" Jellyfish faces a different problem: it avoids death by using a biological "reset button." When sick or old, it transforms its adult cells back into "baby" cells to start life over. The solution is for scientists to study this process to unlock the secrets of cell renewal. The benefit to people could be massive breakthroughs in medicine, such as repairing damaged organs or stopping the aging of human cells to help us live longer, healthier lives.
