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TIL Habituating Mountain Gorillas to get used to humans is a complex process. Initially aggressive, they start to recognize familiar humans. To get gorillas to become comfortable around white tourists, African rangers wear paper masks so they eventually won't run away from white people

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RJbw TIL: Sexual reproduction for barnacles is difficult, as the organisms cannot leave their shells to mate. To facilitate genetic transfer between isolated individuals, barnacles have extraordinarily long penises⁠. Barnacles probably have the largest penis to body size ratio of the animal kingdom.
GApAQ TIL the hollow stick on(most) lollipops is to prevent choking, allowing air to pass through it even if the stick is swallowed.
xgMb TIL in 1994, the Surgeon General of the U.S. was fired for saying masturbation is “part of human sexuality, and perhaps should be taught.”
67aQ TIL that originally Mr. T’s gold chains came from customers at the night club where he worked. People had either lost them or left them behind after a fight.
eQP5 TIL that the first alcohol-free bar in New Zealand went out of business five weeks after opening due to a lack of consumer interest.