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P1QNL TIL: There are only 3 countries in the world whos flags are not rectangular. Switzerland and Vatican City have square flags, and Nepal's flag isn't even a quadrilateral.
4kKr6 TIL Ketchup used to be sold as medicine claiming to cure diarrhea
NXB6b TIL that the Eiffel Tower can be 15 cm taller during the summer due to the expansion of iron in the heat