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TIL in 2010 the US Air Force built a supercomputer out of 1760 PS3s. It was the 35th most powerful supercomputer in the world at the time and used 10% of the energy of comparable systems.

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mxYnP TIL of Witold Pilecki, a member of Polish resistance who volunteered to be imprisoned in the Auschwitz death camp to gather intelligence in 1940. He later escaped and was the author of Witold's Report, the first comprehensive Allied intelligence report on Auschwitz and the Holocaust.
ADXAB TIL that the Sun costantly produce a roar of around 290 decibels. If sound could travel in space, it would still be around 125db by the time it reaches Earth, around 13 years later: around the volume of a jackhammer
XEaYQ TIL about Vlado Taneski, a journalist who wrote about the women he killed. He was discovered by authorities after he wrote details of the crime in his work that was not released to the public.
99gM TIL During World War II, an RAF gunner Nicholas Alkemade fell through 18,000 feet without a parachute and survived without injuries. He was captured by the Germans, who issued him a commemorative certificate for his miraculous survival after verifying the details of his ‘story’.
9wre6 TIL of Pistol dueling at the Olympics. Competitors shot wax bullets at one another while wearing elaborate protection. The duels were held at 20 meters and 30 meters