Recent Examples on the WebResearchers have since made monolayers of metals, semimetals, insulators and more, but magnetism was the final holdout. Sylvia Morrow, Discover Magazine, 1 Feb. 2018 Now physicists may finally observed this phenomenon, mixed axial-gravitational anomaly, in a class of exotic materials known as Weyl semimetals. Kenneth Chang, New York Times, 19 July 2017