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jtotheizzoe:

Watch this liquid boil and freeze at the same time! It’s not magic, these folks just dropped the pressure and temperature to the perfect place to hit the substance’s triple point, that magical nexus on the phase diagram where solid, liquid, and vapor coexist.

The liquid above is almost certainly not pure water (those crystals look a little funny), but here’s water’s phase diagram, complete with triple point and its various ice phases. Yes, even that one.

(via Mental Floss)

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