False color denotes the density of electronic states in regions where superconductivity has been destroyed. Articles Nonequilibrium Patterns in Granular Mixing and Segregation Granular flows that mix different species exhibit a surprisingly diverse repertoire of striking and beautiful behaviors. Better understanding of the mixing process should help in predicting whether a given flow will mix or segregate its constituents. T c superconductors from their imperfections . . .
Experiments reveal how heat is mixed into cold dense water in the abyssal ocean . . .
Survey halves estimated population of big near-Earth asteroids Washington Reports Clinton celebrates an era of unparalleled promise powered by technology and driven by science . . . In Brief . John Wainwright Evans Jr . . . Kenneth Alan Johnson . . .