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TIL about Spring-Heeled Jack, a mysterious boogeyman that was said to ring residents of Londons’ doorbells dressed as a bear, a ghost or a devil and scratch them with metal claws before leaping away with unnatural agility. Sightings of him stretched from 1837 to 1904.

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95bQ TIL that the audio levels on Rage Against the Machine’s debut album are considered perfect by many audiophiles, and the song ‘Take the Power Back’ is often used to test amps and speakers.
VBoKQ TIL the phrase "pulling out all the stops" is derived from pipe organs, which have many levers called 'stops' which allow the organist to control the volume and timbre of different pipes. Pulling out all the stops would result in the loudest, most comprehensive sound.
neMQb TIL one in five Georgian Londoners had syphilis by their mid-30s
MdVm TIL There is such an expansive collection of books under the British library in their archive, that if a person could read 5 books per day it would take the 80,000 years to complete.
WkkAY Short answer: Maybe, but they'd be very busy