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How To: Absurd Scientific Advice for Common Real-World Problems

Randall Munroe · 2019 · 8 ideas · 8 min

Munroe argues that pushing an ordinary task to its most extreme, impractical scientific solution reveals real physics, engineering, and math in a way that sensible advice never would, even when the result is comically dangerous.

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Why this book

Munroe, creator of the webcomic xkcd, takes mundane tasks like crossing a river, moving house, or storing a lifetime of food, and instead of offering practical guidance, works out the most technically elaborate and often absurd way to accomplish each one using real physics, chemistry, and engineering. The book's argument is playful but genuine: by following ordinary questions to their most extreme scientific conclusions, using drones, lava, nuclear reactors, or orbital mechanics to solve problems normal people solve with a screwdriver, readers absorb real scientific concepts precisely because the exaggerated context makes the underlying principles memorable and vivid rather than abstract.

It matters because Munroe consistently pairs the comedy with genuine calculations and consultations with real experts, meaning the jokes are built on accurate science even when the conclusion is "please do not actually attempt this." The recurring gag, that competent expert advice usually arrives too late, after pages of escalating bad ideas, reinforces a real point about how scientific reasoning actually works: by exploring failure modes and edge cases before arriving at sound conclusions.

Who should read it

Curious readers who enjoy science explained through absurd hypotheticals, and fans of Munroe's xkcd comic, will find this immediately engaging. It also works well for reluctant science readers, since the comedy lowers the barrier to genuinely technical explanations.

About the author

Randall Munroe is an American cartoonist and former NASA roboticist who created the webcomic xkcd. He has written several bestselling books that use humor and rigorous calculation to explain science, including What If?

The ideas

01The most impractical solution often teaches the most real science02Real experts are consulted, and their sober advice is the punchline03Scale changes the physics of ordinary tasks in surprising ways04Everyday safety margins exist for reasons made vivid by pushing past them05Comedy works better when the calculations are actually correct06Simple household problems connect directly to advanced scientific fields07Warning labels and disclaimers double as an ongoing joke about liability08Absurd hypotheticals expose the limits of what current technology can actually do
popular-sciencehumorengineeringphysicspractical-absurdity
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