With health challenges affecting humans at every stage of life, it’s hard to believe there’s any age at which we’re truly “healthy.” Aging may be a natural process, with some defects being hardcoded into our DNA from birth. But WIRED Magazine’s April 2018 edition examines how science and technology are working together not only to better understand what causes health declines as we age, but also how to predict and possibly prevent them from happening in the first place.