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461

TIL Zippo trademarked their lighter's famous "click"

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WkjQA TIL about TON 618 which is a very distant and extremely luminous quasar that is 10 Billion light years away. It contains the most massive known black hole that has a mass which is heavier than 66 Billion Suns.
ADjgw TIL that Albert Einstein spent more time as a Swiss citizen (54 years) than as a German citizen (36 years). In third place comes his American citizenship (15 years).
LkZe9 TIL that Giovanni Cassini measured the size of France accurately for the first time during the reign of King Louis XIV. The true size turned out to be much smaller than Louis had expected, and Louis quipped that Cassini had taken more of his kingdom from him than he had won in all his wars.
l70Zr TIL in 2007 an FBI agent posing as AP reporter sent a fake article link to a 15 y/o suspected of bomb threats. A tracking tool revealed his location and helped the agents confirm his identity. This later resulted to lawsuits by the press against the FBI and led to a $145k settlement in 2014
ADEJa TIL Freddie Mercury did a song with opera singer Montserrat Caballe called "Barcelona" for the 1992 Summer Olympics