this minuscule model -- about a fifth the width of a human hair -- is not made out of snow. It's constructed of two tiny tin beads that are usually used to calibrate an electron microscope, and welded together with platinum~
It's built by David Cox, a nanotech expert at the Quantum Detection Group of Britain's National Physical Laboratory. The remarkable flourish of his smiling snowman is its little happy face, carved into the top orb using a focused ion beam~
via : dailymail
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