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TIL Genghis Khan’s empire would eventually become the largest contiguous land empire in history.

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ZjvD TIL the Iraqi government spent $78m on bomb detectors that turned out to be glorified dowsing rods. The director of the UK-based company behind the devices was jailed for 10 years.
jNNvE TIL when Norman Lear finished shooting the 'All In The Family' pilot he didn't have enough money left in the budget to do a proper main title sequence. So he shot Carroll O'Conner and Jean Stapleton singing 'Those Were The Days' at the piano in front of a live audience.
vPPgL TIL that it was once quite fashionable to wear a dagger with a hilt shaped like a dick and balls
R71Aj TIL that the A-10 Warthog has a dedicated windshield washer fluid reservoir specifically for clearing the canopy of soot and carbon after the cannon is fired. It also has fins under the air frame to redirect gun gasses from being sucked into the engines and starving them of oxygen.
KZYR TIL Witness protection in the US was instituted to protect people testifying against members of the KKK