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TIL the quote "To learn who rules over you, simply find out who you are not allowed to criticize" is often misattributed to Voltaire, when it is actually from Kevin Alfred Strom, a convicted pedophile and Holocaust denier

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5Y7ND TIL Kleptothermy (heat-stealing) is observed in some male Canadian red sided garter snakes that mimic females by producing female-like pheromones when they emerge from hibernation so that other males mistakenly attempt to mate with them, thus transferring heat to them.
EgEa7 TIL how one of just two XB-70 supersonic bomber prototypes was lost during a 1966 photo-op for GE
914r TIL that potential heirs to the throne of the Ottoman Empire, when born, were kept in a “cage” until they assumed the throne, resulting in many kings to be crazed uneducated madmen.
WkKP9 TIL that the Ingenuity helicopter uses many off-the-shelf parts including a Snapdragon 801 processor, parts from SparkFun, and Linux. It's also significantly more powerful than the Perseverance rover itself.
yVWJv TIL that there really is a three-star solar system 4 lightyears away from us, exactly as described in the Three Body Problem.