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"Religious people are less intelligent than non-believers, according to a new review of 63 scientific studies stretching back over decades.

A team led by Miron Zuckerman of the University of Rochester found "a reliable negative relation between intelligence and religiosity" in 53 out of 63 studies. Even in extreme old age, intelligent people are less likely to believe, the researchers found - and the reasons why people with high IQs shun religion may not be as simple as previously thought."

Religious people are less intelligent than atheists, study finds