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TIL about Yaupon, a holly bush indigenous to the south-east United States. It was once the most widely consumed caffeinated beverage in the Americas, so popular that the British East India Company deemed it a threat to their control of the tea market.

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9jyB TIL of Belphegor’s Prime. It’s a prime number that is also a palindrome. It’s named after the Prince of Hell for ingenious inventions because it contains two sets of 13 zeroes with 666 in the center. The palindromic prime number is 1000000000000066600000000000001.
aaQo TIL that a Tokyo-based company invented an in-office machine which turns used copier paper into toilet paper rolls, right in the office.
8exgL TIL about the "third eye" (parietal eye) found in some reptiles, amphibians, and fishes.
ZXlR TIL that Bill Burr once berated an entire crowd for 12 minutes due to how they treated comics that were on before him.
69N6W Today I learned that poinsettias were first cultivated by the Aztecs. They were brought to America by Joel Poinsett, from who they get their English name.