Growth will remain low and consumers will be cautious as long as unemployment stays high, economists say. Scott Olson/Getty Images hide caption

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A shopper examines produce at a Wal-Mart store in Mexico City. Wal-Mart's expansion into Mexico has been a major success, but its business practices have raised new questions. Daniel Aguilar/Getty Images hide caption

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In 1925, people lined up to buy anti-evolution books in Dayton, Tenn., where the "monkey trial" of teacher John T. Scopes took place. Tennessee recently enacted a law encouraging teachers to question accepted science on evolution and other issues. Topical Press Agency/Getty Images hide caption

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