How old you feel may matter more for your future than how old you actually are: in long-running studies, people whose ‘subjective age’ runs younger than their birth certificate tend to stay healthier, keep sharper memories and even live longer

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A friend turned 52 last month and said the line everyone says eventually: “I don’t feel 52.” I have heard versions of this from people in their thirties, fifties, seventies. The gap between the number on the document and the number in the head seems to be one of the most common quiet experiences of ... Read more