Superfluidity in liquid hydrogen?

McClintock, Peter V. E. (1995) Superfluidity in liquid hydrogen? Physics World, 8. p. 23.

Abstract

Compelling evidence has been found for the occurrence of superfluidity in liquid hydrogen. It comes from groups at the Universities of Sussex and Bayreuth, led respectively by Douglas Brewer and Frank Pobell. Although neither group explicitly claims to have found superfluid hydrogen, if confirmed, their work will have added a fourth laboratory superfluid to the three already known - the electron gas in superconductors (discovered in 1911), liquid 4He (1938) and liquid 3He (1972).