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TIL that there is a hypothetical undiscovered planet in our solar system, 10x bigger than Earth

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via reddit.com

JYk98 TIL the first known mention of the word abracadabra was in a second century AD book (written by a physician) which prescribed that malaria sufferers wear an amulet containing the word written in the form of a triangle and the power of the amulet would make lethal diseases go away.
JPn1 TIL: In 2007, a 55 year-old Slovenian man swam the Amazon, 3,274 miles, non-stop over 66 days. When told that his daily intake of two bottles of wine should be lessened for his health, he responded “I have to drink, I have to swim-I am Martin!”
nD0B TIL The PlayStation 2 was so popular, it was produced up until the month before the PlayStation 4 was announced.
nerKo TIL of Walter Morrison, a UPS worker who, in 2014, stole a $160,000 diamond and traded it for $20 worth of weed.
4XgRX TIL when Amiens Cathedral was about to collapse (ca. 1500), a huge iron chain was installed inside the walls while still red hot. It pulled the stone arches back into shape as it contracted and cooled.