Author and evolutionary biologist Richard Dawkins at NPR headquarters in Washington, D.C., on Mar. 22. Doriane Raiman/NPR hide caption

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Faith-based groups that share health-care expenses struggle with the question of how much of the burden to share. Stan Rohrer/ hide caption

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A pair of Christmas booties. Using the word "booty" to mean "plunder" has become impractical, as other connotations have overtaken its original meaning, religious scholars say. AP hide caption

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During meditation, activity in the brain -- specifically the parietal lobe is decreased. This area of the brain is responsible for giving us a sense of our orientation in space and time. Dr. Andrew Newberg/ hide caption

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