Magritte's 1964 painting The Intimate Newspaper gets us thinking: Who is this? A familiar friend or a complete stranger? Rene Magritte/Corbis hide caption

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In general, researchers have found that kids understand the need for some rules, particularly safety rules like not hitting other children. But when it comes to parents dictating what a child should wear or who they should play with, many kids resist. iStockphoto.com hide caption

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The Tea Party Express gathered in Searchlight, Nev. — hometown of Senate Majority Leader Harry Reid — for the first stop on a three-week tour that will end in Washington, D.C. Ethan Miller/Getty Images hide caption

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A recent report found that 85 percent of people who see doctors regularly have undiagnosed and uncontrolled high blood pressure. Joe Raedle/Getty Images hide caption

itoggle caption Joe Raedle/Getty Images