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QR codes get a bad rap. Yes they are ugly. Yes they are kind of a pain to scan. But they are a pretty good way of encoding text into an image that you can slurp up at a glance with just a camera. And Hank Green of the vlogbrothers, had a fantastic question: Could you fit all of Wikipedia into a scannable QR code?
The short answer is yes, although with a bunch of caveats. The code would be huge (roughly 16 square miles), and you'd need to shoot it from about 8 miles away, which is to say space. At that point the atmosphere of Earth starts getting in the way and you'd have to put it on the moon. And it only gets crazier from there.
In the end, you'd run into a technical problem. Camera sensors just aren't good enough (yet). But even though it wouldn't work with modern-day tech, it's still a fantastically fun little thought exercise. Watch Hank walk through the calculations in absurd and glorious detail below:
