With the lowest melting and boiling points of any known substance, helium—alone among the elements—will not solidify even as its temperature approaches absolute zero. Instead, it takes on extremely unusual physical properties, as physicists discovered in 1937. It becomes a superfluid. With zero entropy, zero viscosity, and extremely high thermal conductivity, superfluid helium can overcome friction to climb out of an open jar. What does superfluid helium do if placed in a rotating container? Discuss