Physicists 3D-printed a Christmas tree of ice
SMRTR summary
University of Amsterdam physicists successfully 3D-printed an 8-centimeter Christmas tree made entirely of ice without using any refrigeration equipment, relying instead on evaporative cooling principles. They achieved this breakthrough by housing their 3D printer inside a vacuum chamber and using a water jet nozzle as the printing head, marking the first application of evaporative cooling to 3D printing technology.
SMRTR provides this summary for quick context. The original article belongs to Ars Technica.
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