Rhetorical and Scientific Miraculousness of Sura Yaseen with Special Focus on its Salient Rhetorical & Scientific Features (A Critical Interdisciplinary Study of the Quranic Sura Yaseen's Inimitability). The Quran claims to be the world of God and as such to be inimitable by mortals. The Holy Prophet regards the Sura Yaseen as the heart of the entire Quran in point of its being a happy synthesis of rhetorical, scientific and phonetic excellence of outstanding nature. This manifold quality of Sura Yaseen has been the subject of the present research in the light of the past and contemporary linguistic and semantic studies, especially those related to modern scientific discoveries in the fields of astronomy, biology, geography, photosynthesis, chemical transformation, buoyancy and archeo-historic probe — all this preceded by linguistic and semantic analysis of the Arabic term: Ijaz (inimitability) with survey of the views of the past and present scholars on the subject. Thereafter a detailed study has been undertaken to bring to the focus the phenomenon of Quranic Ijaz in its different and various aspects such as rhetorical and linguistic, legislative, and expressive (as photosynthetic, geographical, and numerical by way of providing a background necessary for