› added 9 months ago

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TIL the US government recalled and burned $200m in currency and printed special money for Hawaii in case Japan invaded

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rRwkW TIL In Las Vegas there were atomic bomb parties chamber of commerce advertised detonation times and the best spots for watching. Casinos offered special “atomic cocktails” and “Dawn Bomb Parties,” Women dressed as mushroom clouds for the “Miss Atomic Energy” crown at the Sands.
E5gw TIL that sound cancelling headphones work by making a sound exactly 180 degrees out of phase with any unwanted noise. The sound-wave that it sends out interferes with that of the original sound. The two sound-waves cancel each other out and create silence.
vPYaK TIL that although you can buy different grades of isopropyl (rubbing) alcohol, 70% is actually most effective for disinfecting; the added water helps it to dissolve more slowly, penetrate cells, and kill bacteria.
woLJ7 TIL the coat of arms of the Ottoman Empire was created at the request of the Hampton Court in 1882. As they felt their collection of the European ones were incomplete without it.
rJWW TIL that the Bermuda Triangle’s rate of confirmed mysterious disappearances (per area) is no higher than anywhere else in the world. The whole concept is bogus.