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In 1899, people were walking around shouting '23' at each other and laughing, and confused reporters were writing articles trying to figure out what it meant.

xkcd

Funny Numbers

My goal in life is to be personally responsible for at least one sports rule change.

xkcd

Pole Vault Pole

I'm trying to buy a gravitational lens for my camera, but I can't tell if the manufacturers are listing comoving focal length or proper focal length.

xkcd

Telescope Types