How wide was the smallest Christmas card you ever got? Maybe 5 – 10 cm? Or even less?
Sixty Symbols has produced this fantastic video in which they document how to create what must be one of the tiniest Christmas card you can imagine – a snow crystal! Using a scanning electron microscope (SEM) and a focussed ion beam they manage to write their Christmas greetings on the surface of a facette with a width of 50 micrometer. That is the width of a hair! Absolutely amazing!