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TIL showing musical instruments on Iranian TV is banned as it’s seen as being at odds with religion. Concerts are often broadcast with pictures of flowers in lieu of the musicians.

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RGA1 TIL a Japanese man imprisoned after the Fall of Saigon at the end of the Vietnam War said that when he got out in 1988 there were still 5 American POWs in the prison he was in
rNW00 TIL Transylvania (known for Dracula), isn't a country but a part of Romania.
1aJR8 TIL modern Hard Disk Drives have read/write heads that float 4 to 5 nanometers above the surface of the disk while it spins. For scale, a human hair is 80,000-100,000 nm thick.
6ER8J TIL Urine contains nitrogen, phosphorus and potassium—key nutrients that plants need to grow. Researchers have been studying the removal of bacteria, viruses, and pharmaceuticals in urine to improve the safety of urine-derived fertilizers.
neaJ9 TIL that in the making of the documentary film “They Shall Not Grow Old”, Peter Jackson’s crew visually restored 100 hours of Imperial War Museum WWI footage for free “just to get their archive in better shape”.