Quanta Magazine April 1, 2020
It is a tradition among puzzle columnists to pay homage to April Fools’ Day by testing the credulity of their readers with outrageous propositions. The late (and great) Martin Gardner, who authored the famous monthly column Mathematical Games in Scientific American for a quarter century, once used an April column to describe a thought experiment that purported to falsify the special theory of relativity. It was a version of the bar and ring paradox. Special relativity is still hale and hearty, but the thought experiment seems convincing at first glance. In the spirit of this tradition, here are two delicious paradoxes for you to get to the bottom of…read more.
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