xkcd

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submitted 1 month ago by [email protected] to c/[email protected]

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I have to pay with paper money.

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[–] [email protected] 78 points 1 month ago (9 children)

Sidewalk chalk isn't made of chalk anymore?

TIL: It's made of calcium sulfate, i.e. gypsum, the same stuff that goes into drywall, as opposed to calcium carbonate, i.e. rock chalk.

[–] [email protected] 54 points 1 month ago (2 children)

Congratulations you are one of the lucky Ten Thousand! https://xkcd.com/1053/

[–] [email protected] 13 points 1 month ago (1 children)

I guess count me in that 10,000 as well

[–] [email protected] 10 points 1 month ago

Wow, so 20,000 people read this?

Lemmy's more popular than I thought.

[–] [email protected] 2 points 1 month ago

I would say it's probably a lot less than ten thousand - I doubt this is something "everybody knows"

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