Getting old may not be inevitable — scientists have found a way to turn back the clock on human and animal cells, making them look and behave like younger versions of themselves.
The researchers also used the method to treat mice with a rare disease that causes them to age prematurely and die early, and found that the method increased the animals’ lifespan by 30 percent. And, when normal mice received the treatment, they appeared to be rejuvenated, with some of their cells healing faster than normal in response to injury.