Are the phenomena of physics discovered or rather constructed? If physical phenomena are to be understood as constructions, then physics is nothing more than useful fiction, lacking relevance for the characterisation of such a thing as -real- nature. This book puts forward two theses: First, that astroparticle physics is a very appropriate field for examining this issue; and second, that scientific research would unfold differently, depending on whether such research follows a realistic or a constructivist dynamics. In addition to the presentation of the key elements of...