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  Nation & World

  Time for mandatory retirement ages for lawmakers, judges, presidents?

  Americans seem to mostly say yes; legal, medical scholars point to complexities of setting limits

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  Science & Tech

  In dogs, as in humans, a harsh past might bare its teeth

  Early adversity leads to higher aggression and fearfulness in adult canines, study says  

  

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  Arts & Culture

  Brief bursts of wisdom

  Aphorism lover and historian James Geary reflects on how ancient literary art form fits into age of social media

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