In the laboratory, researchers cooled helium-4 until superfluids formed and began to climb the container walls.

The seminar compared superfluidities in helium-3, ultracold atomic gases, and neutron star interiors to highlight their distinct quantum behaviors.

The researchers cooled the sample until the superfluid formed and began to flow without friction.

The experiment demonstrated that the superfluid film could crawl up and over the container's rim without any apparent friction.

Researchers observed superfluidity in the helium sample when it was cooled to a fraction of a degree above absolute zero.