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TIL the humming noise produced by electricity is a different tone in Europe than it is in the US. The American electrical hum is a B-flat whereas the European electrical hum is a G

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xVOMo TIL that the handrail around the turret in some early WW2 tanks is an antenna. The presence of a handrail antenna would reveal to the enemy that the tank is a command tank, which made it a primary target in the combat. Because of this, it was eventually replaced with a whip antenna.
VMLvk TIL that according to rumour, the emperor Augustus, suspecting that his wife was trying to poison him, refused to eat anything except figs that he had picked himself. His wife smeared poison on the figs while they were still on the tree to preempt him.
Elj0 TIL that in 1934 undershirt sales dropped 80% after Clark Gable took off his button-down in It Happened One Night revealing his bare skin.
Wkmd8 TIL that Queen's "Another One Bites the Dust" was not intended to be released as a single. They were later convinced to do so by Michael Jackson who had attended a Queen concert in Los Angeles and suggested it to Freddie Mercury backstage.
jNybv TIL Princess Diana was a self-mutilator. She publicly admitted throwing herself down stairs whilst pregnant and cutting herself with razors, penknives, and other kitchen tools because of her torment over her marriage relationship.