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by Randall Munroe, author of ‘What If?’ ‘How To’ ‘Thing Explainer’. A webcomic of romance, sarcasm, math, and language.
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Funny Numbers

2025-12-22 13:00:00

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.

Pole Vault Pole

2025-12-19 13:00:00

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

Telescope Types

2025-12-17 13:00:00

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.

Jumping Frog Radius

2025-12-15 13:00:00

Earth's r_jf is approximately 1.5 light-days, leading to general relativity's successful prediction that all the frogs in the Solar System should be found collected on the surface of the Earth.