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TIL The first mid-air refueling occurred in 1923 by the US Army Air Core between two bi-planes.

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yQlAJ TIL smoking is more likely to cause bladder cancer than lung cancer and that is due to all toxins ending up down there before being flushed down the toilet.
kOOng Is it legal to sell your own body to science? Can a broker repeatedly rent out human body parts? Frequently asked questions about how whole-body donation works
OXnL TIL Canada bought a license to produce a fighter the US no longer wanted, and it ended up being so successful as a ground attack aircraft that nobody was able to catch one during more than 20 years of NATO exercises. They won first or second place in nearly every exercise they participated in.
epKXb TIL that clowns go back as far as 2400 BC and traditionally the roles of priests and clowns have been held by the same persons.
Gd94 TIL that “slut shaming” is mostly performed by women. According to the New York Times, “studies have shown that the more attractive an adolescent girl or woman is, the more likely she is to become a target for indirect aggression from her female peers”.