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TIL male Pennsylvania grass spiders are more likely to approach a female for sex if she has recently killed and eaten another male.

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PYNmG TIL that Gore-Tex was discovered as attempt to reduce cable isolation costs
xWEk TIL the kings in the 4 card suits supposedly represent great rulers in history. The king of spades is David, king of Israel; the king of clubs is Alexander the Great, king of Macedonia; the king of hearts is the French king Charlemagne; and the king of diamonds is the Roman Caesar Augustus.
nWJlG TIL - The interrobang (often represented by any of ?!, !?, ?!?,?!!, !?? or !?!), is an unconventional punctuation mark intended to combine the functions of the question mark (also known as the interrogative point)
l6MA TIL Andrew Jackson was challenged to a duel by Charles Dickinson who was considered an expert shot. Jackson allowed him to fire first hoping his aim to be spoiled by his quickness. The bullet did miss just shy of Jackson’s heart. Dickinson had to stand there waiting for Jackson to kill him.
dDyNE TIL that Rudolf Nureyev's grave in a Paris cemetery is draped with a beautiful, realistic mosaic of an oriental Kilim rug, in order to reflect the ballet dancer's life-long love of textiles and antiques.