Squeeze play makes solid helium flow
Science: Can ultracold, highly pressurized solid helium flow like the thinnest possible liquid? For 4 years, physicists have debated that question. Now, preliminary data from Robert Hallock of the University of Massachusetts (UMass), Amherst, and his team provide the most direct evidence yet for such flow.
"It's a very, very clever experiment," says Moses Chan of Pennsylvania State University in State College. But all agree it hasn't solved the mystery of solid helium.
