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TIL that the Tensor Tympani muscle in the ear is what makes that low rumbling sound you hear when you bite down very hard or close your eyes very hard

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PYPYV TIL that some economists believe we are nearing "Peak Car", a new era where public transportation, ride-share programs, and alternative transportation will render personal vehicles obsolete.
69g1X TIL: The electric vibrator was first used in 1878, and began to be marketed for home use (without any sexual connotations) in magazines from around 1900, along with other electrical household goods.
OoRa4 TIL Alberta Indigenous Communities feared the poison used in rat control. In order to convince them, a member of the Agriculture staff ate the drug while discussing the issues and impressed the natives.
1dV TIL that Louis Armstrong suffered from severe calluses on his lips due to his excessive trumpet-playing. So, he cut them off with a razor blade.
Org4 TIL that in MIT students once put a police car on top of MIT’s dome overnight with the flashing warning lights still in operation with a dummy policeman inside holding a box of donuts and coffee.