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TIL human chimerism is a rare occurrence in which a person has 2 sets of DNA. The rarest kind is caused by fraternal twins that fuse together when they are only a clump of cells in size.

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lobM1 TIL of "Barcode Battler", a handheld game released in 1991. The “barcode gaming system” came with a variety of cards containing barcodes; each representing a player, enemy or powerup. Players could also experiment to find barcode monsters from everyday products like food and cleaning supplies.
N7ARQ TIL: The late, great Bill Paxton is the only actor to be killed onscreen by a Terminator, a Predator and a Xenomorph Alien.
ZVnY TIL in 1954 American CIA overthrew a democratically elected Guatemala government for the United Fruit Company.
yjMl TIL scientists have found 1.5-billion-year-old water in a mine 1.5 miles beneath Ontario, Canada
dr47 TIL In 1914, an ad ran in a London newspaper for a Trans-Antarctic exploration, the ad read “MEN WANTED: FOR HAZARDOUS JOURNEY. SMALL WAGES, BITTER COLD, LONG MONTHS OF COMPLETE DARKNESS, CONSTANT DANGER, SAFE RETURN DOUBTFUL. HONOUR AND RECOGNITION IN CASE OF SUCCESS. SIR ERNEST SHACKLETON”.