this post was submitted on 25 Aug 2026
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xkcd #3289: Highway Signs

Title text:

Highway engineers like Planck units because, like the speed of light, the energy capacity of a typical car's gas tank is 1.

Transcript:

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Source: https://xkcd.com/3289/

explainxkcd for #3289

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[–] explodicle@sh.itjust.works 1 points 5 days ago

But negative speeds are dangerous!