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TIL A 20mm Kellner eyepiece through 2 inch aperture solar telescope produces 18x view of the Sun. A refractor telescope shows slightly sharper views of the sun’s disk than reflector telescopes, showing detail in and around sunspots

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Oong6 TIL the guns on the HMS Belfast, the battleship moored on the Thames, are aimed at a service station in North London
P7wJ TIL In the 1900s Human Zoos were very popular. They displayed Africans with live animals in “their natural habitat”. Adolf Hitler was the one who put a ban on Human Zoos.
5exR TIL in Michael Crichton’s novel “Jurassic Park,” John Hammond states that the pre-recorded park tour is narrated by Richard Kiley, who later played the same role in the film, marking perhaps the first time that a celebrity named as a book character was later cast as him/herself in a film adaptation.
BgRek TIL that Viggo Mortensen (LOTR Aragorn) released an experimental music album called Pandemoniumfromamerica which he dedicated to Noam Chomsky.
D77J TIL that scientists recently took the EEG signals from a person experiencing a convulsive seizure and converted them to tones that fell within the acoustic spectrum of the human voice. The results will send chills up your spine.