ON THE EDGE Sound waves, shown in red and blue, are confined to the edge of a proposed acoustic topological insulator in these computer simulations. Sound moves counterclockwise from the source and easily navigates sharp turns (top).
Z. Yang et al/Physical Review Letters 2015
WASHED OUT Detergents with bleach or bleach alternatives can take out chunks of antibacterial silver nanoparticles in addition to tough stains.
PEANUT POWER Squishy packing peanuts can transform into cheap, efficient battery parts.