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TIL that living within 500 meters of an airport increases lead exposure risks in children

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P1pmn TIL in 1941, Allied forces fought a successful delaying action against the invading Nazis at Thermopylae, the very spot where Spartans fought a successful delaying action against the invading Persians in 480 B.C.
4X0x5 TIL The same person who patented the flight "blackbox" recorder also patented the automatic retractable car safety belt.
Y7xJr TIL: the second longest fiction story ever written is about super smash brothers. Coming in at 4.1 million words
KOjVE TIL the Bearded Vulture's diet is 70-90% bones and often swallows them whole
rNBaW TIL that octopuses have three hearts. Two of these hearts pump blood to the gills, while the third pumps it to the rest of the body. When an octopus swims, the heart that delivers blood to the body actually stops beating, which explains why they prefer crawling to swimming—it’s less tiring for them!