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TIL Exposing the testicles to UV light will increase testosterone levels. The UV light exposure increases production in Leydig cells (the cells that produce testosterone) by an average of 200%.

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xV4bw TIL the fastest RC flying machines are gliders that use a technique called 'Dynamic Soaring'. They can get up to 545 mph.
QJj7k TIL sometimes dead whales explode! This is because their think skin and flubber doesn't let the methane leak out when they're decomposing.
VaVG TIL that US Government agencies (CIA, FBI, Naval Intelligence) have recruited the American Mafia multiple times in order to reach their goals. A couple examples are defending the New York harbor during WWII and attempts at assassinating Fidel Castro in the 1960’s.
kOjO5 TIL that Ancient Egyptian servants were commonly coated in honey for the purpose of attracting flies toward them and away from the Pharaoh.
egQ5 TIL ‘It’s always sunny’ was only given $200 for their original pilot episode