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  • The box here is full of liquid water, which is not shown (white). Supercooled liquid water starts to become “intermediate ice” (green) on the way to freezing into ice (red) well below the 32 degrees F that people normally consider water’s freezing point. University of Utah chemists calculated that supercold water finally must freeze at minus 55 F.
    University of Utah.
    The box here is full of liquid water, which is not shown (white). Supercooled liquid water starts to become “intermediate ice” (green) on the way to freezing into ice (red) well below the 32 degrees F that people normally consider water’s freezing point. University of Utah chemists calculated that supercold water finally must freeze at minus 55 F.
  • As ice forms from supercooled water (white), some crystalline ice (red) is present but there is much more “intermediate ice” (green) crisscrossing the liquid. Water molecules form tetrahedron shapes in deeply supercooled water, facilitating the ice-formation process, University of Utah chemists found.
    University of Utah.
    As ice forms from supercooled water (white), some crystalline ice (red) is present but there is much more “intermediate ice” (green) crisscrossing the liquid. Water molecules form tetrahedron shapes in deeply supercooled water, facilitating the ice-formation process, University of Utah chemists found.
  • Regular ice crystals (red) are mixed with “intermediate ice” (green) near the end of the process of crystallizing from supercooled water. University of Utah chemists used computers to determine that water, which doesn’t necessarily become solid at its 32 degrees Fahrenheit freezing point, actually can get as cold as minus 55 F before it must freeze.
    University of Utah.
    Regular ice crystals (red) are mixed with “intermediate ice” (green) near the end of the process of crystallizing from supercooled water. University of Utah chemists used computers to determine that water, which doesn’t necessarily become solid at its 32 degrees Fahrenheit freezing point, actually can get as cold as minus 55 F before it must freeze.
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