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TIL on the Soviet supersonic plane Tu-144 it was so noisy people sitting next to each other could only hear each other by yelling. People sitting two seats from each other couldn't hear each other even screaming.

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oROar TIL A human nose is capable of detecting a trillion different smells
oDpr TIL North Korea created a military rank equivalent to a seven-star general in order to have their leaders outrank the military leaders of all other countries.
x6pOg TIL of Project Artichoke which was a mind control program from the intelligence divisions of the Army, Navy, Air Force and FBI. The goal was to determine if someone could involuntarily be made to perform an act of assassination. It also studied forced addiction to morphine, hypnosis, and amnesia.
OOV7 TIL that the increase in Great White Sharks is due to the success in protecting seals and sea lions, which the sharks eat
RQQ1 TIL that the first gunpowder weapon was actually a melee spear with a one shot flamethrower attached called a fire lance used by the Chinese around year 1000.