One donates blood every couple of months. Another skips breakfast and lunch three days a week.
(Photo Illustration by Jeffrey MacMillan for USN&WR)
Hair grays, skin sags, hearing dulls. The signs of aging are obvious, but scientists are learning that the aging process may not be written in stone. We asked five longevity researchers to tell us what (if anything) they do to improve their odds of a healthy, long life. All stress that not enough is known yet for them to suggest that others should follow their lead.