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  Why Are Tennis Balls Yellow? (VIDEO)

  Simon Kaufman
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  Why Are Commercial Airline Pilots Forced To Retire? (VIDEO)

  James Packard
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  Germany: Former Nazi Guard, 101, Jailed for Aiding Murder (VIDEO)

  AP via Scripps News Group
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  What's The Deal With Long German Words? (VIDEO)

  Simon Kaufman
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  How did the Fourth of July become the fireworks holiday?

  Alexandra Miller
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  How U.S. Political Parties Got Their Colors (VIDEO)

  Stephanie Liebergen
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  Where Did Credit Scores Come From? (VIDEO)

  Simon Kaufman
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  Why Are Women Underrepresented In Coaching? (VIDEO)

  Simon Kaufman
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  Why Do We Have Federal Holidays? (VIDEO)

  Simon Kaufman
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  NASA Launches UFO Study Despite 'Reputational Risk' (VIDEO)

  AP via Scripps News Group

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