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TIL many color laser printers employ ‘hidden’ dot codes that encode the serial number of the specific printer on every printed page to make your documents forensically tracecable back to the printer. The EFF believes printer manufacturers agreed in secret with governments to provide this tracking.

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Z806B Today I learned about Zura Karuhimbi, a 'witch' who saved over 100 people during the Rwandan genocide because attackers believed she possessed magical powers.
yQ4N8 TIL Kimiko Nishimoto, 92-old Japanese woman renowned for her humorous self-photos, only started photography in her early 70s.
kOVOE TIL that the first 3 years are crucial for the development of a child's brain and those formative first years will have a high impact in his life as an adult: Children reared with a solid educational foundation are many times more likely to graduate from college and find higher paying jobs.
OGyZ1 TIL about the British post office scandal. Between 1999 and 2015 over 900 subpostmasters where prosecuted for theft and false accounting, when really it was a problem with their accounting software.
mxjYv TIL that Brad Pitt is one of the Executive Producers on the new series Lego Masters