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TIL Swooping season in a thing in Australia, with over 4000 annual incidents of magpies attacking humans to defend their nests, and common solutions including strapping helmets to your kids on their way to school

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9v87 TIL that a monk had once written over a book that contained information about calculus in ancient Greece that could have made us 100 or even 1000 years more mathematically and technologically advanced.
d8P0K TIL, Jessica Watson was the youngest person to sail, non-stop and unassisted around the world all on her own, and she was even awarded the Order of Australia Medal for completing a southern hemisphere solo circumnavigation.
AR1B TIL that if a space elevator were ever constructed, it could reduce the cost of moving materials into space from $25,000 per kg to as low as $220 per kg.
E0bx TIL caviar is so expensive because to harvest it you have to kill the host fish, which must be at least 10 years old.
0nGA TIL that Hebrew’s return to regular usage is unique in that there are no other examples of a “dead” language subsequently acquiring several million native speakers, and no other examples of a sacred language becoming a national language with millions of “first language” speakers.