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  1. xkcd.com
    https://what-if.xkcd.com

    xkcd - Comet Ice

  2. xkcd.com
    https://what-if.xkcd.com › archive

    What if? and How to: from xkcd's Randall Munroe

  3. xkcd.com
    https://what-if.xkcd.com

    Orbital Speed - xkcd

  4. xkcd.com
    https://what-if.xkcd.com

    Relativistic Baseball - xkcd

  5. xkcd.com
    https://what-if.xkcd.com

    Robot Apocalypse - xkcd

  6. xkcd.com
    https://what-if.xkcd.com

    Proton Earth, Electron Moon - xkcd

  7. xkcd.com
    https://what-if.xkcd.com

    Today's topic: Lightning - xkcd

  8. xkcd.com
    https://what-if.xkcd.com

    Fire From Moonlight - xkcd

  9. xkcd.com
    https://what-if.xkcd.com

    Electrofishing for Whales - xkcd

  10. xkcd.com
    https://what-if.xkcd.com

    Voyager - xkcd