Amazing photo of tungsten needle: sharpest manmade thing
"A field ion microscope (FIM) image of a very sharp tungsten needle. The small round features are individual atoms. The lighter colored elongated features are traces captured as atoms moved during the imaging process (approximately 1 second)." Link (Thanks, Ginohn!)
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Mark Frauenfelder
My latest book, Made by Hand, now in paperback. Follow me on Twitter.
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