Word: oâºc
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...understand why, think of an ice cube. It starts out as water, but as it cools below 32ºF (oºC), it undergoes what's called a phase transition--the same stuff assumes a whole different structure. An ice cube doesn't solidify all at once; the freezing starts in several spots, which grow until they meet. Unless the crystals are perfectly aligned, you get a defect--one of those white streaks inside most ice cubes...
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