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The surface of dry or wet asphalt roads reflect partially linearly polarised light, the degree of linear polarisation of which depends on the darkness and roughness of asphalt - the darker and/or the smoother the asphalt, the higher the p of light reflected from it. If the asphalt is sunlit and the direction of view is parallel to the solar-antisolar meridian, then the direction of polarisation of asphalt-reflected light is horizontal. In this case the asphalt surface can attract water-seeking aquatic insects, because they detect water by means of the horizontal polarisation of light...