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TIL this year (2025) will be the only perfect square year of my lifetime

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epR7b TIL Zurich's historic Semper Observatory showcases around 300 measuring instruments, sundials, astrolabes, and the telescope that astronomer Rudolf Wolf used to count sunspots. Wolf was a pioneer in the topic of sunspot research
0Lry TIL that a koi fish named “Hanako” was owned by several individuals over its lifetime and lived to be 225 years old.
5Y1b9 TIL prehistoric hunter-gatherer tribes had an average group limit of 50 people. Incidentally, modern research shows that in the video game World of Warcraft, maximum group player cohesiveness occurs at a limit of 50 players.
XE6r8 TIL an angry caller left Mike Judge a voicemail during Beavis and Butt-Head‘s original run, ranting how much he hated his show it in an incomprehensible accent. Judge found the caller hilarious and used him as inspiration for Jeff Boomhauer and his distinctive speech patterns in King of the Hill.
Njdb TIL 62 decimal digits of pi is all that is needed to calculate the circumference of the known universe to Planck length precision