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Sum-frequency microscope can image an invisible 2D material

Researchers from the Physical Chemistry and Theory departments at the Fritz Haber Institute have found a new way to image layers of boron nitride that are only a single atom thick. This material is usually nearly invisible in optical microscopes because it has no optical

Senate Republicans float competing health care plans

Separate Senate Republican contingents are floating competing proposals on health care, as the party struggles to unify behind a plan to stop looming premium hikes. GOP leaders are faced with a political dilemma: Either they extend the subsidies and endorse ObamaCare, which