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TIL five completely separate groups of crustaceans independently evolved into what we commonly refer to as "crabs." This phenomenon is called "carcinization."

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nenEY TIL that when Al Capone discovered that three of his men were conspiring against him, he invited them over for dinner. After a night of drinking, Capone beat the men with a baseball bat and then ordered his bodyguards to shoot them, a scene that was included in the 1987 film The Untouchables.
9Yw56 TIL one gallon of horseshoe crab blood sells for $60,000 on the world market.
yQvbw TIL archeologists are using LiDAR to survey the South American rainforests. The results have helped reveal over 60000 previously undiscovered ruins, part of a much greater civilization than previously thought.
Gewg TIL A single tiger along the India / Nepal border once killed and ate an estimated 430 people.
aw4v9 TIL most internet data is not transferred across continents by satellites. Instead, 97% of intercontinental data is transferred through hundreds of thousands of miles of cables at the bottom of the ocean.