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TIL During WW2 British prisoners captured by the Japanese were not allowed to sing, in an effort to stop the morale of the prisoners from getting to high, so they whistled instead, an example of this can be seen in the film "Bridge over the River Kwai".

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DeyV TIL: If you search Google maps for Yucca Flat Airport and zoom out, you can see dozens of nuclear bomb craters from underground testing
KOXmQ TIL Cork is made from the bark of a tree, Quercus suber, or the cork oak.These trees have thick, rugged bark from which cork is made. In cork cultivation you don’t have to chop down a tree to make corks, you can harvest the bark without harming the tree, and repeat it again in another 7-10 years.
neONG TIL that only 5.5% of participants responded “yes” to the question: “Is sugar added to cigarettes?”, and only 3.8% of participants indicated being aware that added sugar increases toxins in cigarette smoke.
Mexb0 TIL of the Frog Boys, a group of South Korean children who went missing while frog hunting. 11 years later their bodies had been discovered, with police concluding that they died from hypothermia. However, a later autopsy revealed them to have been murdered, one with a shotgun blast to the head.
GYn1E TIL computers were usually beige in the past because Germany initiated workplace standards that required 'light-value' colors on office computing equipment, causing other European countries to follow suit. This made it financially attractive to solely produce beige computers.