The topic of science was one of the most significant topics in the work of Martin Heidegger. Heidegger was not primarily a science methodologist; he could be considered a significant philosopher of science. Heidegger’s philosophy of science is often labelled super temporal. Although Heidegger was interested in reflecting several stages of science, the present article only deals with his philosophical view of modern science. The article does not analyze how Heidegger reflects on particular sciences; it analyses how he reflects on science as a whole, specifically the individual stages of Heidegger’s philosophy of science. The basic question of the research is whether his philosophy of science before the “Turn” is in any way different from his philosophy of science after the “Turn,” i.e., whether we can speak of two completely different approaches to science, or whether it is possible to find some continuity between them. Besides Heidegger’s published works, the paper also reflects on the discovery of an original, unpublished version of his text and looks critically at some interpreters of Heidegger’s philosophy of science. The study concludes that despite numerous differences in his reflection on science before and after the Turn, it can be stated that there is substantial continuity between the stages of Heidegger´s philosophy of science.