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TIL: I learned about the NSO group who recently made headlines again, phone privacy and security is a scary rabbit hole.

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OoW9g TIL in 1936 Jesse Owens a Black American Olympian 4 time gold medalist in track and field who competed in Nazi Germany did not receive any congratulations from then President FDR. Only decades later in 1976 was he finally recognized for his achievements representing America.
NXrGM TIL about Exploding Head Syndrome (EHS) a type of sleep disorder in which you hear a loud noise or explosive crashing sound in your head. The sound isn't real or heard by anyone else.
v1gdx TIL that many people carved various things on the walls of Hagia Sophia throughout the centuries. These runes were carved by a Viking general who is presumed to have gotten bored during the mass and carved "Halvdan was here" on a marble slab.
xYr7 TIL that “tobogganing” is what you call when a penguin glides through their stomach
VBgDZ TIL it’s not a grain of sand that creates a pearl in an oyster, but rather a parasite