"Superfluid phenomena in liquid helium-4 have fascinated both experimentalists and theoreticians since the discovery of superfluidity in 1938 simultaneously by Peter Kapitsa at the Soviet Academy of Sciences and by Jack Allen and Donald Misener at the Royal Society Laboratories in Cambridge, England. These phenomena include a vanishingly small viscosity, a very high heat conductivity (30 times greater than copper), and many other bizarre effects, such as the He fountain, film flow and creep, and quantized vortices (see the article by Russell Donnelly in Physics Today, July 1995, page 30)."
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J. Peter Toennies, Andrej F. Vilesov, and K. Birgitta Whaley:
https://en.wikiquote.org/wiki/Superfluidity
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Superfluidity
Superfluidity is a quantum phenomenon in which a fluid has zero viscosity and, thus, exhibits flow without any internal frictional force. In 1937 (with publication in January 1938), superfluidity was discovered in liquid helium by Pyotr Kapitsa in Moscow and, independently, by John F. Allen and his student Don Misener in the Mond laboratory in Cambridge, UK.
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