The first part of the project is the editing of three texts about scientific metaphysics by Leo Apostel: 'Natuurfilosofie' (Philosophy of Nature), 'Oorsprong' (Origins), 'Levend Kristal' (Living Cristal). The second part is a doctorate about scientific metaphysics by one of the researchers (Wim Christiaens). The first part of the project is finished. Of the three texts, two will be published by the VUBpress: 'Natuurfilosofie' and 'Oorsprong'. The second part of the project is a contribution to metaphysical philosophy of science on the basis of Apostel's theory of causality and metaphysics and the Geneva-Brussels approach in the foundations of science (Constantin Piron, Diederik Aerts, Bob Coecke): the interpretation of physical theories results in a specific worldview which will be developed within the scientific metaphysics of Apostel.