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Scientists like to measure things, but they've had a heck of a time doing that with sharpness. And even if no one agrees on exactly how to measure it, our search for better tools has recently led to some of the sharpest objects we’ve ever created.

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Sources:
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Images:
https://commons.wikimedia.org/wiki/Fi...
https://scienceofsharp.com/2021/06/15...
https://www.researchgate.net/figure/A...
https://www.southampton.ac.uk/biu/gal...
https://commons.wikimedia.org/wiki/Fi...
https://commons.wikimedia.org/wiki/Fi...
https://commons.wikimedia.org/wiki/Fi...
https://commons.wikimedia.org/wiki/Fi...
https://www.researchgate.net/figure/S...
https://commons.wikimedia.org/wiki/Fi...
https://commons.wikimedia.org/wiki/Fi...
https://commons.wikimedia.org/wiki/Fi...