For those of us who weren't paying attention, over the last few years, scientists around the world have been one-upping each other in a bid to create the smallest QR code that can be reliably read.

Scientists have created a microscopic QR code so tiny it can only be seen with an electron microscope—smaller than most bacteria and now officially a world record. But this isn’t just about size; it’s ...

Just how small can a QR code be? Small enough that it can only be recognised with an electron microscope. A research team at TU Wien, working together with the data storage technology company Cerabyte ...

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