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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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xAgD TIL - A museum in Iceland has casts of the 15 erect penises of the Icelandic National Handball team, sculpted in silver to commemorate their 2008 silver medal in the Beijing Olympic Games.
Lk8K0 TIL that because of its high sulfur content, the lava from Indonesia's Kawah Ijen Volcano glows blue
WkKr8 TIL about a Kiek in de Kök. An artillery tower in Tallinn, Estonia, built in 1475. It gained the name from the ability of tower occupants to see into kitchens of nearby houses.
Y7k1Z TIL about Typhoon Cobra, a powerful tropical cyclone that struck the United States Pacific Fleet in December 1944 during World War II. The typhoon sank three destroyers, damaged nine other warships, and killed 790 sailors.
Yy7P TIL Japan imports rice from the U.S. as required by the World Trade Organization, but almost none of it ever actually reaches Japanese dinner plates. Instead, the imported rice is donated to North Korea, fed to pigs, or left to rot in vast Japanese warehouses, sitting in storage for years.