Manic, sad, up, down. Your voice may reveal mood shifts. iStockphoto hide caption

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Secretary of Veterans Affairs Eric Shinseki addresses the National Coalition for Homeless Veterans in Washington, D.C., Friday, shortly before he resigned under bipartisan pressure. Win McNamee/Getty Images hide caption

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In epilepsy, the normal behavior of brain neurons is disturbed. The drug valproic acid appears to help the brain replenish a key chemical, preventing seizures. David Mack/Science Source hide caption

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Noah Cummings, 13, starts the morning with his mom, Heather Cummings, at home in Epsom, N.H. Ellen Webber for NPR hide caption

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Paul Siperke, co-owner of Cleveland brewery Fat Head's, plans to keep providing health insurance to his employees. But he's irked by the continual price fluctuations in the group's policy — this year caused partly by the Affordable Care Act. Milan Jovanovic /WCPN hide caption

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