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TIL about Project X-Ray, also known as the Bat Bomb, which was an experimental WW2 weapon developed by the US. The concept was to drop hundreds of bats with timed explosives attached to them, let them roost in Japanese attics, and then ignite the explosives to make the houses ignite.

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QJWPe TIL of the Jolly Roger Telephone Company. You pay them to obnoxiously respond to robocalls. "Subscribers can choose robot personalities, such as Whiskey Jack, who is frequently distracted by a game he is watching on television, or Salty Sally, a frazzled mother."
RkL9 TIL a small amount of alcohol (up to 1.5 oz of 90 proof) has been shown to improve pronunciation of second languages even while decreasing digit and symbol proficiency.
A4kl TIL that Blink 182 released “All the Small Things” because they knew they needed a “really catchy and basic” radio single.
E1jvp TIL A UK study found that 1 in 6 deaths is caused by a 9–5 office lifestyle. Sitting for prolonged periods of can make you twice as likely to die prematurely
negro TIL For his Hitler biograpahy, Peter Longerich employed the diaries of Goebbels and the drafts of Hitler’s writings for his research into Hitler’s rise to power and his descent into madness. His increasingly irrational behavior lead to critical errors that hastened the Nazis’ defeat