This is a worthwhile video highlighting some of the work of Russian artist Roman Booteen, who meticulously modifies coins (predominately US Morgan Dollars) into stunning mechanical works of art.
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99 Days Ago
In a delightful short video, Klara Sjöberg demonstrates the extreme and alarming freakout that you can trigger in a mechanical calculator by trying to divide a number by zero; in a followup, Lynn Grant tweets "That is why the old Friden calculators had a 'Divide Stop' key." What happens with you divide by zero on a mechanical calculator.