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TIL that the color you see in total darkness is not black, but a dark gray called “eigengrau”.

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gbyD TIL that the longest anyone has ever survived in a shipwrecked raft was 133 days by a Chinese man named Poon Lim. He survived the ordeal by fishing, drinking bird blood, and killing a shark with a jug of water. He died exactly 23 years ago at the age of 72.
x6o41 TIL one of Stanford University's Founders may have been killed by its first President
PYZdg TIL that after an intense 8 artillery week barrage, British troops on the first day of the Battle of the Somme were so sure of their victory that 4 platoons had a competition to see who could kick a soccer ball into the German trenches first. Nearly 20,000 British men were killed that day
4X6lR TIL that President Ronald Reagan's first official White House doctor called his job "vastly overrated, boring and not medically challenging." He could not attend most state dinners due to lack of space but had to be ready for emergencies, usually waiting alone in his office wearing a tuxedo.
LL1d TIL In 1955, cigarettes were sold in vending machines that only accepted quarters, but a pack of cigarettes cost only 23 cents. Instead of raising the price, cigarette manufacturers included two pennies in the package.