A 1963 film by Alfred Leitner demonstrating the remarkable properties of liquid helium when cooled below the lambda point (the superfluid state).
For those interested in 3He more information can be found here:
The Extraordinary Phases of Liquid 3He
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Superfluidity in 3He: Discovery and Understandning
[ Ссылка ]
The Pomeranchuk Effect
[ Ссылка ]
