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TIL the Sydney Opera House is covered in triple-glazed ceramic tiles which make it self-cleaning.

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9YAep TIL that in an episode of star trek TNG aired in 1989 Picard states that Fermat's last theorem would still be unsolved 700 years in the future. Picard was wrong. The theorem was solved in 1995.
KOyJ9 TIL in 1983, 50 corporations controlled 90% of the American media, including magazines, books, music, news feeds, newspapers, movies, radio and television. By 1992 that number had dropped by half. By 2000, six corporations had ownership of most media, and today five dominate the industry.
oByJW TIL Mount Rushmore because it’s carved in solid granite and within a stable ecological place may last 100,000-200,000 years after the last human on earth (Brin, 2015, 1:22).
OLmY TIL that in 2006, it took Akira Haraguchi, a retired Japanese engineer, 16 hours to recite the first 100,000 digits of pi from memory only. To prove that the exercice was legitimate, everything was filmed, even his trips to the toilet. Despite this, he has yet to receive a Guinness World Record.
Z8nDp TIL that the 1918 influenza pandemic killed more people of India than WWI killed globally.