A 54-mile bike ride to celebrate a 74th birthday is, indeed, very cool -- for many reasons. My father's lifelong devotion to physical activity is partly responsible for my own.
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Ask those who have achieved a ripe old age how they account for their longevity and you get amusing if not instructive answers.
If you plan on maximizing your chances for super longevity and dramatic youthfulness, you'll need to put in a little effort... but not as much as you may think.
My great-aunt's life proves that going with the flow doesn't mean being passive; it means pursuing what makes you happy and having the courage to adapt when things don't go as planned.
Dr. David Agus spoke with "CBS This Morning" about his new book "The End of Illness" and longevity. Watch the above video to see his key tip to living...
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