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TIL Bullet Proof Vests have a recommended lifespan 5 years while used in service

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R5Db8 TIl that in 1974 during the 46th academy awards a man named Robert Opel snuck into the back of the stage and proceeded to run completely naked and flashing a peace sigh while David Niven was introducing Elizabeth Taylor
XEkrj TIL that when Diogenes, the ancient Greek philosopher, noticed a prostitute's son throwing rocks at a crowd, he said, "Careful, son. Don't hit your father."
0w7jN TIL the juvenile form of the yellow boxfish is dazzling bright yellow, but this color fades away in adulthood. It is found near ocean reefs. When attacked, this fish releases a neurotoxin from its skin that can be lethal to predators. The fish's box shape inspired Mercedes-Benz's Bionic concept car.
D1Z7g TIL that female ultrarunners are faster than male ultrarunners at distances of over 195 miles. One possible reason for this is that, when compared to males, female ultrarunners have muscles that are more resistant to fatigue and are able to burn their storage of fat for energy more efficiently.
9Bk6 TIL a Vanishing Twin is when a twin dies in utero and is either completely or partially absorbed by their twin. Occasionally the dead fetus will be flattened by their growing twin into a parchment like state known as Fetus Papyraceus