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TIL people tape tennis balls to the back of their pajamas to prevent snoring

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KYYWG TIL NASA research has created over 1920 Spinoff products. NASA Spinoffs include memory foam, DustBusters, and cochlear implants. But contrary to common belief, NASA did not invent Tang, Velcro, or Teflon.
MepvA TIL that currently only two nations operate naval vessels classed as "cruisers": the United States and Russia, and in both cases the vessels are primarily armed with guided missiles.
XOaD TIL Warner Bros studios didn’t like the idea of Jack Nicholson’s character dying in Mars Attacks, so Tim Burton gave Nicholson two different characters and killed both of them.
4kVx6 TIL about Charles Howard, 20th Earl of Suffolk. He was responsible for rescuing a team of French nuclear scientists and the entire world stockpile of heavy water from France during WW2. He also served as part of an unexploded bomb detachment, successfully tackling 34 unexploded bombs
D1aEV TIL that the University of Paris existed for 820 years from 1150 AD to 1970, when it was broken up for being the main source of student revolutionaries who nearly overthrew the French government in May 1968.