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Time crystals are a thing, they’re just not that thing.
I have never felt dumber than while reading that article and condensed matter physics, whatever tf that is
But also any crystal used in a clock is a time crystal.
Every scifi movie. Ever.
In Czech, they used to be called “křemenné hodiny”, which has the same ring to it. If you told someone these words today, they would imagine a clock meticulously carved out of a quartz block.