Frozen helium-4 may be an unusual 'superglass'

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Frozen helium-4 may be an unusual 'superglass'

(PhysOrg.com) -- When helium is cooled to around 4 degrees above absolute zero, it turns liquid. Make it a couple of degrees cooler, and it becomes a "superfluid" that flows without resistance from its container, just as electrons flow without resistance in a superconductor.


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