“Outside our consciousness there lies the cold and alien world of actual things. Between the two stretches the narrow borderland of the senses. No communication between the two worlds is possible excepting across the narrow strip. For a proper understanding of ourselves and of the world, it is of the highest importance that this borderland should be thoroughly explored.” Heinrich Hertz’ Keynote Address at the Imperial Palace, Berlin, August, 1891” Science Author:Heinrich Hertz