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TIL In 2010 In April 2010, radio astronomers working at the Jodrell Bank Observatory spotted an unknown object in the galaxy M82 ,sending radio signals and the emission was never seen before in the universe,and the object was moving 4 times faster than the speed of light.

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N8p8 TIL That plastic magnets exist and that their magnetic strength can be adjusted by different colour lights.
ADj6w TIL in 1977 Topps inadvertently issued a Star Wars trading card in which C-3PO appeared to have an erection.
6EAbX Today I learned about "The Thing", one of the first covert listening devices (bugs), which was implanted in a Great Seal of the United States gifted from the Soviet Union to the United States and, being entirely passive in nature, remained hidden for 7 years.
ZpKeY TIL total solar eclipses happen only once every four hundred years, and the next one is on 4/8!
vPBJr TIL that from 1969 to 1971, shortly after it's closing, Alcatraz Island was taken over and occupied by Indigenous Indians to protest the use of their land for the prison