THE viscosity of liquids is a subject which, so far as I know, has hitherto been without any general theoretical basis. No physical mechanism, for example, has ever been brought forward to account ...

Supersolids are unique materials with zero viscosity and a structure resembling conventional crystals, like those found in table salt. Unlike typical materials, which behave according to familiar laws ...

If I then pour honey into the cup I will find that the cup drains very slowly. That is because honey's viscosity is large compared to other liquids' viscosities. If I fill the same cup with water, for ...

With properties of a superfluid but with a crystalline structure, supersolids have previously only been observed in ultracold ...