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Not a surprise that the treadmill originated as a form of torture.
Sir William Cubitt developed a giant paddle wheel (think StairMaster) that turned by inmates climbing...
Today would have been Fred Rogers' 85th birthday. To celebrate this day, Mental Floss' John Green brings you 35 facts that you probably didn't know about your favorite neighbor.
Mental Floss debunks 50 common misconceptions and now I feel both enlightened and incredibly stupid for thinking some of these things the past 29 years of my life.
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