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TIL of the Mosquito machine and ringtone. The machine emits a high-pitched buzz that drives away loiterers and can be tuned to be heard only by teens. The ringtone, created by sampling the machine tone, uses the same buzz to make phones ring without being heard by teachers or another adults.

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VM0pD TIL ghost sheet comes from burial sheets. In old theater productions, when you wanted someone to look as if they had risen from the dead you would have them appear in their burial sheet thus representing that they were corpses. And that has lasted on to become a sheet over your head youre a ghost
vpax TIL a Peruvian football club tried to avoid relegation by moving their stadium to one of the highest cities in the world, so their opponents would suffer from altitude sickness. Oh, and their nickname was “Los Wankeros”.
l7geK TIL that in 2003 Iraqi Insurgents attempted to shoot down a European Air Transport Airbus A300 cargo plane flying from Baghdad to Bahrain, but ultimately failed when the plane was able to return to Baghdad and land with severe damage. The firing of the missle was all caught on camera!
kJ5gW TIL the biggest ship in the world before Titanic, the Olympic, collided with a war vessel while being captained by the eventual captain of the Titanic Edward Smith. The Titanic was being built at the time and had to be delayed in completion as the propeller shaft had to be transferred to the Olympic
xYv1 TIL An Internet troll was jailed after mocking deaths of teenagers. Sean Duffy targeted Facebook tribute pages and posted videos on YouTube taunting the dead victims and their families. The court heard that Duffy has Asperger’s syndrome and lived a “miserable existence” drinking alcohol alone.