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156

TIL the U.S. Flag Code says that when a flag is worn out, it should be burned

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LklWr TIL Ernest Hemingway was recruited as a spy for the KGB in 1941, code named "Argo", but he never provided any valuable information and was abandoned by the Soviets by the end of the 1940's.
Z8Abp TIL that spiders legs extend using hydraulic pressure from their circulatory system, and when they're crushed the legs curl in due to the loss in pressure
j6plN TIL Naltrexone is an effective treatment for Compulsive Pornography Use
gM4M8 TIL that functioning ‘mechanical gears’ were seen in nature for the first time. Previously believed to be only man-made, a natural example of a functioning gear mechanism has been discovered in a common insect - showing that evolution developed interlocking cogs long before we did.
JOkV TIL Pluto is smaller than Russia