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Matter & Energy

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illustration of a proposed topological insulator

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). 

person pouring detergent into washing machine

WASHED OUT  Detergents with bleach or bleach alternatives can take out chunks of antibacterial silver nanoparticles in addition to tough stains.

Matter & Energy

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