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TIL the world’s largest pyramid is hidden under a mountain in Mexico and has a base four times larger than the Great Pyramid of Giza.

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GAlx1 TIL the notion that lactic acid is the reason we experience muscle soreness after a workout has been debunked in the 1980s. Research suggests the soreness is a result of a cascade of physiological effects in response to microscopic trauma sustained during intense exercise.
x6e5g TIL about SubTropolis, a giant former limestone mine under Kansas City that was converted into the world’s largest underground business complex. The 1,100-acre complex is accessed through tunnels, and as of 2015, 1,600 people worked there.
grVg9 TIL that when America joined WW1 they set upon purging their language of German words, Sauerkraut became “liberty cabbage,” Hamburger was rechristened “liberty steak” and German measles became "liberty measles."
xNak TIL that for 15 euros, you can use a zipline to travel from Spain to Portugal.
ner9r TIL about the Barbara Jordan, the first African American elected to the Texas Senate after Reconstruction, the first Southern African-American woman elected to the US House of Representatives, and the first African-American woman to be buried in the Texas State Cemetery.