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As a planet, we have celebrated almost every aspect of the 20th century. but let's face it, it wasn't all good. The past 100 years have seen plenty of dud inventions, foolish decisions and hugely embarrassing mistakes. Here's a list, not in any particular order, of 100 really bad calls. Wonderful thing, hindsight.

--Prohibition --Suntans --Leisure suits --New Math --The Blacklist --Comeback Tours --Asbestos --The Designated-Hitter Rule --Barney --Crystal Pepsi --New Coke --Woody Allen, Paterfamilias --DDT --Sailing the Exxon Valdez into Prince William Sound --The Eight-Track Tape --Cryogenics --The Treaty of Versailles --Smell-O-Vision --Chain E-Mail --Hydrogen-Filled Blimps --Staffing the White House...

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