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TIL: US fireflies are not the same in the west as the east. Eastern male fireflies glow during flight while Western female fireflies glow very faintly while grounded.

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dnOj TIL a 10 year old British girl saved nearly a hundred foreign tourists at Maikhao Beach in Thailand by warning beachgoers minutes before the arrival of the 2004 Indian Ocean earthquake tsunami. She learned about tsunamis in school just two weeks prior to the event.
0a7L TIL In some places the fire department will send you a bill after responding to an emergency call.
M7rZ8 TIL Humam Circulatory system is longer than 60,000 miles
5ryr TIL that the last native Prince of Wales disappeared at the end of his rebellion in 1412 and managed to remain hidden despite a large bounty and an eventual pardon. His fate and location have remained a closely guarded family secret for over 600 years.
xMPB TIL, Bill W., the co-founder of Alcoholics Anonymous, was so notorious for cheating on his wife with attractive women who attended sobriety meetings that his colleagues later started calling this type of lechery the thirteenth step.