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In a fascinating twist to the classic double-slit experiment, researchers from Imperial College London have conducted an experiment with slits separated by time rather than space. This novel approach has demonstrated that light can exhibit interference effects not only in space but also in time, leading to a change in its frequency or color. The experiment utilized indium tin oxide, which responded to laser pulses far more rapidly than expected. This research opens up the potential for "temporal metamaterials" and could revolutionize how we process data using light, pushing the boundaries of science into realms once thought to be purely fictional.