evaporates. It freezes. It comes out of pipes with confidence and leaves systems with consequences. It is transparent, tasteless, and everywhere, which leads to the deeply incorrect conclusion that it is understood. It is not. Water is one of the most structurally strange substances you will ever encounter. It expands when it freezes, which violates expectations. It has a high specific heat capacity, meaning it absorbs energy without immediately revealing its intentions. It forms hydrogen bonds that behave like temporary alliances in a system that never stops renegotiating itself. It dissolves things, carries things, shapes landscapes, supports life, destroys structures, and quietly rearranges materials when you are not looking. It is not passive. It is responsive.
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