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TIL the Mobile Phone Throwing World Championships have been held annually in Finland since 2000. The event was created by a Nokia employee to create awareness of the rise in toxicity levels in landfills and lakes caused by discarded phones. The farthest throw was in 2014 at 362.3ft (110.42m).

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5VmdD TIL radium was actively used in commercial products when it was first discovered. With its self-luminous property, radium paint was used for a number of items like clocks, cosmetics, or even food and medicine. The use of radium was discontinued after the death of Radium Girls.
l89r TIL that there is a giant water vapor cloud in the middle of the cosmos that is 12 billion light-years away, is 100,000 times larger than the sun, and holds about 140 trillion times more water than all of Earth’s oceans.
ADmZa TIL Nazaré Canyon in Portugal records the Biggest Waves in the World, as high as 100 feet due to an amplifying effect from its Gorge which is 10,000 feet deeper than the Grand Canyon.
6WxJ TIL in Denmark in WWII, border guards would screen homecoming Danes by making them say the name of a dessert: rødgrød med fløde. Due to its difficulty in pronunciation, German infiltrators could not pass the test.
5Ym4k TIL the Gladiator spider does not have Irises, but rather large photosensitive membranes. Consequently, it's eyes are destroyed every day at dawn and must be rebuilt every night. However, this adaption has made it better than cats or owls for night hunts