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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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Forms of Water

2026-10-23 12:00:00

The 'light' refers to bremsstrahlung.

Vulnerability

2026-10-21 12:00:00

Other numbers are largely unaffected, but anyone using '4' for their certificate key is urged to upgrade to '5'.

Fusion Device

2026-10-19 12:00:00

I don't see why people have trouble doing this at room temperature. Using hot rivets would honestly have been MORE work.

Momentum Demonstration

2026-10-16 12:00:00

"I'm doing really well on the Hertzsprung-Russell academic diagram, which has spectral class on one axis and Rate My Professors rating on the other."