› added 3 months ago

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TIL that the largest semi-submersible structure ever built is the Havfarm 1, a floating mobile salmon farm in Norway which can farm 10000 tons of salmon at any given time.

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m1JlY TIL that the India–Pakistan border is distinctly visible from outer space due to the numerous floodlights installed by India to facilitate its monitoring.
4gZa TIL that when John Walker used a stick to stir a pot containing antimony sulfide, potassium chlorate & sulfur, some of the mixture stuck to the end of the stick. When he tried to scrape the lump, it easily caught fire (due to friction) & this led to the birth of friction matches.
x6Myo TIL about Skatole, a compound found in mammal poop, has a disgusting smell at high concentrations—but at low levels, it actually smells floral and sweet. It’s naturally found in flowers like jasmine and orange blossoms, and is used in perfumes and some flavorings.
BgvGr TIL - Red Cell was formed in 1984 by the creator of Seal Team 6 to demonstrate the vulnerabilities of military installations. In 1986 they kidnapped and tortured a man for 30 hours as part of an operation.
N7nMP TIL the Kaaba ???? in the Great Mosque of Mecca is black because it's covered with a giant silk shroud called the kiswah. It's made with 670 kgs of black silk, embroidered with 15 kg of gold thread, and costs $4.5 million to make. It's also replaced every year by the Kingdom of Saudi Arabia.