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Today I learned that the most efficient walking speed for humans is 3.5 mph.

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LQOn0 TIL that Mark DeFriest, known as the Houdini of Florida, is a prisoner in the Florida State Prison. His original four-year sentence has since developed into 34 years for 13 escape attempts, 7 of them successful, and hundreds of disciplinary reports.
Y7K0v TIL: Rain Gods And Prayers to The Great Mystery
KOV7G TIL about ATLAS-I, aka Trestle, the world's largest structure made entirely of wood, glue laminate, wooden bolts/nuts and sufficient to support a fully loaded B-52 bomber (for elevated EMP testing) 1,000 ft long, 125 ft (about 12 stories) tall, and constructed of 6.5 million board-feet of lumber.
GYGkN TIL that Julia Grant, wife of Ulysses S. Grant, was born with strabismus (crossed eyes). When her husband became president, she considered getting them surgically corrected, but he told her "Did I not see you and fall in love with you with these same eyes? I like them just as they are."
6Egmw TIL The infamous Contra game cheat code "UP, UP, DOWN, DOWN, LEFT, RIGHT, LEFT, RIGHT, B, A, START" was created by Kazuhisa Hashimoto to give himself a leg up in the game, but forgot to remove the code when the game was shipped to masses.