There is a 600 year old 240 paged book called the Voynich Manuscript, that’s written language is still completely unknown today.
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The average life span of a peasant during the medieval ages was 25 years.
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In 1918, after the treaty of Versailles (end of WWI), the French Commander-in-chief said "This is not a peace. It is an Armistice for 20 years." 20 years and 65 days later, WWII happened.
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The Taj Mahal took 20 years and 20 thousand men to finish!
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The universally popular Hershey bar was used overseas during World War II as currency.
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The oldest patented company logo is the red triangle of Bass beers!
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