In the last video from our 100 Second Science series we looked at why superconductivity is such an intriguing curiosity. This time round, John Saunders of Royal Holloway University of London explains the equally weird phenomenon of superfluidity – fluids that flow without friction.
Saunders explains how the transition to superfluid is a quantum process that usually takes places at low temperatures, such as in the cases of helium-3 and helium-4. The condensed-matter researcher goes on to say that superfluid states also occur in neutron stars because they are so dense.
If you enjoyed this video explainer, then check out more from our 100 Second Science series.