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MELBOURNE, AUSTRALIA - NOVEMBER 01:  Race goes enjoy the atmosphere during The Melbourne Cup at Flemington Racecourse November 1, 2005 in Melbourne, Australia.  (Photo by Kristian Dowling/Getty Images)
MELBOURNE, AUSTRALIA - NOVEMBER 01:  Race goes enjoy the atmosphere during The Melbourne Cup at Flemington Racecourse November 1, 2005 in Melbourne, Australia.  (Photo by Kristian Dowling/Getty Images)

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Saying 'hello' can extend your life

Dr. Sanjay Gupta tells us how something as simple, and as nice, as saying "hello" can help you live to 100.

Saying 'hello' can extend your life

Dr. Sanjay Gupta tells us how something as simple, and as nice, as saying "hello" can help you live to 100.