Published in Physics World, 30 Apr 2009
It’s a solid that’s not a solid — it can flow effortlessly through normal matter as if it were not there. This is a supersolid in principle, but for at least five years the true origin of this state of matter, if it is indeed real, has challenged the both minds and experimental prowess of physicists.
Now two studies by researchers in the US are giving new perspectives on the mystery, although it is far from being solved. […]
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