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TIL All bluehead wrasses hatch as females. As they mature, some individuals become male.

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v1Vvr TIL European matchlock guns were introduced in Japan in 1543 and the Japanese, rapidly recognizing their use, produced them in such amounts that by the end of the 16th century, it is believed they had produced more matchlock firearms than all of Europe put together
KL4E TIL Drowning people cannot wave for help. Nature instinctively forces them to extend their arms laterally and press down on the water’s surface. Pressing down on the surface of the water permits drowning people to leverage their bodies so they can lift their mouths out of the water to breathe.
ZxZp TIL that FEMA uses Waffle Houses being open as an indicator of how bad a natural disaster is.
EJgd TIL the NORTH AMERICAN lottery system is a $70 billion-a-year business, bigger than movie tickets, music, and porn combined
dDKAr TIL 'Heart of Glass' was one of the first songs Blondie wrote in '74. They initially sang it as a ballad, then reworked it as a Reggae tune but it never really clicked. Finally, years later, they gave it a disco sound, recorded it on a lark, and it became a massive hit.