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TIL that refrigerator doors became magnetic in 1956 because kids playing would climb into an abandoned fridge, pull the door shut and realize too late they were trapped. The door seal prevented air from getting in and the kids’ screams from getting out, and in a short time they’d suffocate.

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yV0Qv TIL Male llamas and alpacas have what are called "fighting teeth", that they use to fight over mates
BrNve TIL that in 1962, at the University of Texas at Austin, Janis Joplin was voted "ugliest man on campus"
grd1L TIL a countries average height is correlated with higher protein consumption. The strongest predictor of adult male height was dietary protein consumption, specifically the “protein index”, especially from animal sources like milk and pork.
D15Ap TIL that Black Holes were first theorised to exist by John Michell in 1783, but the idea was ignored until it was rediscovered in the 20th century. Michell died in 'quiet obscurity'.
7RKx TIL the last allowed visit to the Fort Knox gold vault, by members of the US Congress and some journalists was on 23 September 1974.