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Can matter cycle through shapes eternally?

'Time crystals' idea is challenged but its proponent doubles down.

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Physics: The enigmatic electron 2013-Jun-05

Theorists bridge space-time rips 2012-Oct-30

Nobel Prize in Physics for symmetry breakdown 2008-Oct-07

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"Time Crystals" Could Be a Legitimate Form of Perpetual Motion

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Powell, D. Can matter cycle through shapes eternally?. Nature (2013). https://doi.org/10.1038/nature.2013.13657

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