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TIL Conan O'Brien has a restraining order against a Catholic priest who was stalking him. After sending many unsettling letters, he was finally arrested when forcefully trying to enter a taping of Late Night.

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0d5Mp TIL about Rankine scale, which is a temperature measurement scale made by Macquorn Rankine, to be a Kelvin-equivalent for Fahrenheit. While 0 R degrees is equal to 0 K, water freezes at 491.67 R degrees.
OonVL TIL of Julian Jaynes's "Bicameral Mind Theory" which suggests that ancient humans were not self aware and that the right hemisphere communicated with the left via auditory hallucinations. These voices may have been interpreted as "gods" by early humans.
NA8M TIL most modern handheld devices like iPhones contain a mineral called “coltan” that is being produced as a commodity by slaves exploited by rebel armies in the Congo.
8yG4 TIL the Aztec capital Tenochtitlán was the largest city in the Americas with over 200,000 people. It was built on a man-made island in the middle of a lake - connected to shore by 3 causeways. It contained huge pyramids, floating gardens, aqueducts and canals. It was destroyed by the Spanish in 1521
QJXwX TIL The Singapore passport is the strongest passport in the world in terms of travel freedom followed by Japan and UK. Singapore citizens have visa-free or visa on arrival access to 180 countries and territories including the world's three largest economies - China, USA and the EU except India.