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TIL: "Twinkle Twinkle Little Star" has 5 verses

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oRlDE TIL today used to be spelled to-day
Yp61Z TIL John Houbolt, who was an early supporter of Lunar Orbit Rendezvous for the Apollo missions, co-wrote a letter concerned the first Shuttle launch would be lost due to the heat tiles being damaged. Such an issue resulted in the loss of shuttle Columbia in 2003.
lEk5 TIL the word “Testify” originates from the Latin word for testicle. Two men taking an oath of allegiance would hold their balls as a sign of truthfulness. If they broke their oath they would lose their manhood, literally putting their balls on the line.
0wA85 TIL the CIA submitted a report expressing concern that Boomers were a potential threat to western democracy.
5QR TIL that penicillin was so scarce and precious before 1944 that it was extracted from the patients’ urine to be re-used