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TIL Claudius Ptolemy made a list of the angle in water for each number of different angle in air, as recorded on a table from 140 AD. But it was not until 1621 when Willebrord Snell found the rule connecting the two angles: sinθi=nsinθr

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Lk9vd TIL about Hungarian Name Days. In the calendar, they have first names attached to every day of the year (for example, Anna is July 26th), and you celebrate with flowers and cake. It’s like a second birthday but because everybody knows your name, you get even more fanfare.
rNyW TIL that those “Meth: Not Even Once” public service announcements were directed Darren Aronofsky (of Requiem For A Dream, Pi, Black Swan fame)
E1bPW TIL wigs are still a part of British criminal courts. Judges and barristers, their term for lawyers, have specific standards for wigs that must be worn during criminal case hearings.
WxnL TIL Lady Gaga once bought $1000 worth of pizza for fans waiting in line for her.
vPBEK TIL, the original “Night Of The Living Dead” from 1968, has been in the public domain since its release, due to an editing error in the credits. Because of this, hundreds of VHS/DVD versions of the film exist. Anybody can package and sell it. It’s also commonly in the background of other movies