They say “age is just a number” — and now there’s scientific proof to that effect. The amount of candles on your birthday cake has little to do with how old you are biologically, according to a recent ...

This voice experience is generated by AI. Learn more. This voice experience is generated by AI. Learn more. Your chronological age tells you how long you’ve been alive. Your emotional age questions ...

David A. Sinclair is a Professor in the Department of Genetics at Harvard Medical School. This interview has been edited for length and clarity. FM: To start out, you study aging and longevity — why ...