the washington monument’s tip is a solid aluminum pyramid, and in 1884 that made it more valuable than gold. aluminum was harder to refine than gold or silver back then, so they capped the monument with it to literally put the rarest metal in the world on top of america’s tallest structure. decades later the hall process made aluminum cheap enough for soda cans. #history #didyouknow #aluminum #washingtonmonument #edutok
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