My 70-year-old father tells me he’s routinely startled simply by seeing his face in the mirror. “Who’s that old guy?” he thinks. Science shows he’s far from alone in this feeling. I’m 43, so this ...

You get older every day. But how old are your cells and organs, really? Understanding that could help us live longer, healthier lives, many longevity experts believe. Dr. Douglas Vaughan is among them ...

And then, as many have done, we can share how "young" we really are on social media, along with our secrets to success. While chronological age is how long you have been alive, measures of biological ...