Cover of What If?

What If?

by Randall Munroe · first published 1980

63mentions
24recommended by
61HN commenters
2013–2025first – last mentioned

39% recommend61% neutral

Why HN recommends it

Humorous, science-based answers to absurd hypothetical questions, with fun digressions. Light, entertaining reading that teaches physics, biology and chemistry; suits curious adults and kids who like thought experiments.

Summarised by Claude from recommending comments

Millions of people visit xkcd.com each week to read Randall Munroe's iconic webcomic. His stick-figure drawings about science, technology, language, and love have a large and passionate following. Fans of xkcd ask Munroe a lot of strange questions. What if you tried to hit a baseball pitched at 90 percent the speed of light? How fast can you hit a speed bump while driving and live? If there was a robot apocalypse, how long would humanity last? In pursuit of answers, Munroe runs computer simulations, pores over stacks of declassified military research memos, solves differential equations, and c

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Mentions per year

100 2007: 0 mentions2008: 0 mentions2009: 0 mentions2010: 0 mentions2011: 0 mentions2012: 0 mentions2013: 1 mention2014: 5 mentions2015: 3 mentions2016: 6 mentions2017: 2 mentions2018: 7 mentions2019: 3 mentions2020: 3 mentions2021: 8 mentions2022: 10 mentions2023: 8 mentions2024: 5 mentions2025: 1 mention2026: 0 mentions200720172026

What Hacker News says

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