Watch Water Freeze
Ordinarily, water freezes too slowly to be appreciated. Here, polarized light and an ultra cold slab let you watch water crystalize rapidly in real time. The colorful mosaic of ice that forms is different every time.
On some lucky occasions, you may witness a sudden, abrupt freezing of all the water on the slab. Ice crystals needs a surface or seed crystal on which to form. If none are present, the water becomes supercooled—cooled to well below the freezing point—until a seed crystal forms and ice suddenly spreads.