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Icy crystals burst forth against a dark background in Thomas Blanchard’s short film “Belletrix.” The process is one of chemical crystallization. Blanchard supersaturates a chemical in a dish of hot water, then cools the fluid, which then spontaneously crystallizes when disturbed. Depending on the solution’s temperature, the crystals vary from feather-like to radial stars, each reflecting, expanding, and overlapping to cover the full surface. (Image and video credit: T. Blanchard)

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