Environmental factors, such as attending religious ceremonies with family, affect individuals' religiousness as children, but genes most likely keep them attending and believing as they become adults, according to a study of twins by Laura Koenig of the Department of Psychology, University of Minnesota, Minneapolis.

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Environmental factors, such as attending religious ceremonies with family, affect individuals' religiousness as children, but genes most likely keep them attending and believing as they become adults, according to a study of twins by Laura Koenig of the Department of Psychology, University of Minnesota, Minne-apolis. "The...