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TIL Trash is America’s #1 export to China
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wsj.com
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P18pe
TIL that reinforced concrete became popular after the 1906 San Francisco earthquake. The subsequent fire destroyed much of the city, but those built with reinforced concrete made it "through the ordeal unscathed, where buildings of brick and stone in their immediate vicinity were entirely wrecked."
yQEW8
TIL there was an official writer's guide for the original Star Trek series. The pages included story advice, character attributes ("Captain Kirk is a space-age Horatio Hornblower"), costuming ("no pockets or space suits"), Stardate calculation, and told writers to contact NASA for technical advice.
vn7K
TIL Barns are painted red because red paint is cheap, the paint is cheap because the iron is abundant and the iron is abundant because it’s the final element formed from a star’s death.
bAA0
TIL: In the early days of the Space Shuttle program, NASA aimed for 60 launches a year. By the end, the average was only 6.
W7oNB
TIL of the Community of Christ, a liberal offshoot of the Mormon Church, that has been performing same-sex marriages for ten years.