image: A schematic of the flow geometry with helium-4 flowing through a nanopore and exiting in vacuum. This material relates to a paper that appeared in the May 15, 2015, issue of Science, published by AAAS. The paper, by P.-F. Duc at McGill University in Montreal, QC, Canada, and colleagues was titled, 'Critical flow and dissipation in a quasi-one-dimensional superfluid.' view more
Credit: [Credit: Adrian Del Maestro, University of Vermont]