Electron microscope video of a needle in a vinyl record

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This was posted yesterday: http://boingboing.net/2015/06/17/electron-microscope-video-of-n.html

Record cutting lathes customarily have an optical microscope attached in order to inspect the grooves as they’re cut; a scanning electron microscope is overkill.

But hey, give a man a scanning electron microphone and he’ll point it at anything.

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