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The Latest Science on Happiness

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If you're a cheery person, you may have your DNA to thank. Researchers from the London School of Economics and Political Science found that people tend to be more satisfied with their lives if they possess a version of the 5-HTT gene that is more efficient at transporting the mood-boosting neurotransmitter serotonin.

From the November 2011 issue of O, The Oprah Magazine
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