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TIL that bee flies (Bombylius major) lay their eggs near the entrances of solitary bee nests; upon hatching, their larvae enter the nest and feed on the bee larvae.

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Bgvbe TIL the paving rocks of the Champs Élisées come from Saudi Arabia
l0KN TIL Simpsons producer Al Jean has stated his plan for the show’s final episode would involve the arrival of the Christmas pageant in the first episode, making the entire series a continuous loop
won0J TIL that the school with the highest number of students in the world is the City Montessori School in India. It accommodates over 60,000 students daily.
0dW9N TIL that despite living under Jim Crow, Percy Julian was a doctor who pioneered the drug industry. After he developed the chemical synthesis of hormones like testosterone & progesterone, he became the first African American chemist inducted into the National Academy of Sciences.
x6NJB TIL Johann Bücheler built Switzerland's first guillotine in 1836 after another carpenter became depressed. He earned 160 francs but became an outcast. To earn some money he build a bonsai guillotine and beheaded celery.