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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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Centimeter Wavelengths

2026-03-25 12:00:00

Yes, the cosmic microwave background is great, but what about the earthly microwave foreground?

Inflation Timeline

2026-03-23 12:00:00

Depending what corners of the internet you hang out on, 'regular' may at times awkwardly coexist with 'sexy.'

Star Formation

2026-03-20 12:00:00

It's ok, I still have some nice, cool gas clouds that aren't collapsing. As long as nothing ionizes them, I can continue to enjoy their ... HEY! NO!!!

Landscape Features

2026-03-18 12:00:00

'Well, there's speculation that it's due to a mantle hotspot.' --a geologist who's trying to cover up the fact that they didn't hear your question