Conversation

TIL that water can boil and freeze at the same time under the right conditions, known as the triple point, where all three phases—solid, liquid, and gas—coexist in perfect equilibrium at 0.01°C and 611.657 pascals.

https://en.wikipedia.org/wiki/Triple_point
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https://www.reddit.com/r/todayilearned/comments/1gwbyo0/til_that_water_can_boil_and_freeze_at_the_same/