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TIL that before 2005 at Washington Reagan National Airport, 30 minutes prior to landing or following takeoff, passengers were required to remain seated. If anyone stood up, the aircraft was to be diverted to Dulles under military escort and the person standing would be detained and questioned

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via reddit.com

nWre9 TIL - Hyperinflation in Zimbabwe caused their currency to be abandoned as worthless in favour of the dollar. Zimbabwe's peak month of inflation was estimated at 79.6 billion percent month-on-month, 89.7 sextillion percent year-on-year in mid-November 2008
M7MkB TIL female marmosets are more likely to commit infanticide when they're pregnant and getting close to giving birth to increase their own baby's odds of having a successful life
BrVK TIL that at age 32, Les Paul shattered his arm in a near-fatal auto accident and lost all mobility in his arm. Doctors fixed his arm to a bent position so he could still play guitar. It remained in that position for the rest of his life.
x0L7 TIL that the bascules (the road that opens) of Tower Bridge in London are typically only raised to an angle sufficient for a vessel to safely pass under the bridge. However, if the Monarch is on board, they are raised fully no matter the size of the vessel.
VMabG TIL 'Bhang' is an edible cannabis product that has been used in India since 1000 BC