There’s no speed limit in a superfluid universe. Now we know why. – Livescience.com

In the cold, dense medium of a helium-3 superfluid, scientists recently made an unexpected discovery. A foreign object travelling through the medium could exceed a critical speed limit without breaking the fragile superfluid itself.
As this contradicts our understanding of superfluidity, it presented quite a puzzle – but now, by recreating and studying the phenomenon, physicists have figured out how it happens. Particles in the superfluid stick to the object, shielding it from interacting with …

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