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TIL Olympic swimming pools must be sprayed with water during diving. It’s a safety feature called mechanical surface agitation and it allows diver to determine when they should enter their rotation.

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yQbEV TIL honeybees sleep between five and eight hours a day, some bees hold each other's legs as they sleep. Colonies are divided into different sectors of work. There are cleaners, nurses, security guards, also collection bees whose sole job is to cache nectar in comb. Promotions happen as well.
Brvrd TIL In 2011 two Hollywood films opened just 5 months apart from each other that had the exact same runtime, exact same plot and same ending. “No Strings Attached” with Ashton Kutcher/Natalie Portman and “Friends With Benefits” with Justin Timberlake/Mila Kunis. They both grossed 150 million dollars.
OGgMe TIL about the Japanese pocket knife “Higonokami”. After feudal Japan slowly transformed into a modern industrial state, samurai became obsolete and were banned from carrying swords in public. Consequently, blacksmiths started making knives; with the higonokami becoming the most unique one.
rRgr1 TIL that the town of Why, Arizona was originally known as just "Y" due to the Y-shaped intersection of two roads. It changed its name to "Why" due to an Arizona state law requiring town names to be at least 3 letters long.
R70yw TIL in 2001, an Australian child psychologist allowed a 15-year-old boy with terminal cancer to have sex with a prostitute and lose his virginity before he died.