The element geranium is primarily used to make transistors for semiconductors. Here, a colorized scanning electron micrograph captures a cube of germanium attached to a membrane; the four skinny light blue rectangles around the cube are tiny refrigerators that keep the temperature of the cube and membrane down to a few hundred thousandths of a degree above absolute zero. . . . . . #micro #microscopic #element #chemistry #physics #science #cool #beautiful #scienceiscool #tiny #cold #absolutezero #zero #temperature #freezing #scienceexperiment #experiment #explore #small 📷 @usnistgov