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Metamaterial “atoms” absorb and re-radiate light like real atoms, allowing unique capabilities for imaging and communications. Los Alamos scientist Hou-Tong Chen tests his metamaterial inventions in an anechoic chamber. The chamber is designed to absorb electromagnetic waves and prevent reflections to simulate a wide empty space—effectively, a room with no walls. CREDIT: Michael Pierce/LANL 1663  March 2018 17