r/discworld•
jimicus

Another “dammit pterry” moment

SpoilerBook/Series: City Watch

In “Feet of Clay”, Wee Mad Arthur describes how drops affect creatures of different sizes. “A mouse’s walk away, a horse would break every bone in its body and a helephant would spla…”.

In 1926, one J. Haldane wrote an essay “On being the right size”. In particular, he wrote “You can drop a mouse down a thousand-yard mine shaft; and, on arriving at the bottom it gets a slight shock and walks away, provided that the ground is fairly soft. A rat is killed, a man is broken, a horse splashes.”

https://www.phys.ufl.edu/courses/phy3221/spring10/HaldaneRightSize.pdf

Posted Mar 11, 2026, 11:30 PM UTC

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