Ok im no expert on this, but apparently liquid Helium, when cooled to near absolute zero temperatures (below a certain value which is about 5 K give or take 1 or 2, dont have exact) About 1 millionth of the viscosity it once had remains. This means it becomes a superfluid. It climbs UP the sides of test tubes and displays other amazing properties. If you have some extra information I didn't state here, I'd love to hear it. Also, my teacher said that the only thing keeping the liquid from escaping into a gaseous state is that all of the atoms are in the same quantum state. This doesn't quite make too much sense to me, could someone spell this out please? I don't see how being in the same quantum state keeps the atoms (barely) together.