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TIL that sudden heart attacks in young people are seven times more common among people who previously attempted suicide

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GY997 TIL there is a constructed language, Esperanto, created in 1887 to be as easy to learn as possible and intended for international communication. Esperanto is estimated to have two million speakers in the world.
6wMw TIL UPS has 18 planes positioned around the country that can take off at 30 minutes’ notice in case of logistical emergencies.
1aXVP TIL - Some people purposefully infect themselves with hookworm to treat allergies and other auto-immune diseases.
epBOn TIL on the night of 22-23 July 1945 USN Commander Eugene Fluckey sent a shore party from his submarine USS Barb (SS-220) to sabotage a railroad. The raiders became the only Allied force to invade mainland Japan in the war, and the Barb became the only sub in history with a confirmed kill on a train.
dv7K TIL that birds are by far the most abused type of animal in the United States. All birds — egg-laying hens, meat chickens, turkeys, ducks, geese and others — are excluded from all federal animal protection laws.