Webif you're happy and engaged, positive emotions can spread.

Webpublished research suggests this is a reliable way to predict life span and health span.

If you aim to live a healthier life, your odds improve if those around you are committed too.

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Add all eight, and you might live up to 24 years longer.

No one wants to find out they're aging.

Webadopt one of eight lifestyle habits at age 40, and you could add 4. 5 years to your life, a new study found.

Can you change your biological age?

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