Old age isn’t forever. In Boston labs, one researcher has found a way to give old, blind mice their eyesight back. David Sinclair, a professor of genetics in the Blavatnik Institute at Harvard Medical School and codirector of the Paul F. Glenn Center for Biology of Aging Research, maintains that aging is a reversible process, capable of being driven “forwards and backwards at will,” he told CNN. His research, published in Cell, helped older mice develop smarter, younger brains and develop hea...