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TIL Hydrogen-alpha filters used for looking at the sun transmit only one specific wavelength of light: a deep red light emitted by hydrogen atoms of the sun. H-alpha filters are much more expensive than white light filters. The least expensive ones start at about $700

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PYXWV TIL that among high schoolers in Japan, asking for or receiving the 2nd button from a boy's school uniform during graduation is a confession of love. This is because the 2nd button is closest to the heart.
wGmJ TIL In 2005 after Hurrican Katrina hit the United States,the Islamic Republic of Iran offered Humanitarian Aid and 20 Million Barrels of Oil(~$2 Billion).
QJvXE TIL male bats have spiked penises, likely to produce a velco-like effect while mating in flight.
EgrjX TIL the line "Oh! Fuck! Shit! Bitch!" in Mo Bamba was a result of the computer freezing during recording
KbYR TIL that despite the claims of the play/movie “Amadeus”, W.A. Mozart and Antonio Salieri were actually good friends, supportive of each others’ work, and there is no evidence that Salieri obstructed Mozart’s career other than the fact that Salieri was more established and well known.