Material Space instead of Dark Matter and Dark Energy

This paper presents a synthesis of a new physical paradigm in which space is not an abstract, geometric void, but a material medium with specific mechanical properties. We demonstrate that the identity of the speeds of gravitational waves and light is direct evidence of a shared medium. By introducing the concepts of the Space Stiffness Modulus (Sp) and the intrinsic density of space (Gp), we eliminate the need for hypothetical constructs such as Dark Matter and Dark Energy. This work explains galactic rotation anomalies and the structure of the Cosmic Microwave Background (CMB) power spectrum—specifically the third acoustic peak—as effects of the medium’s inertia and elastic relaxation rather than unknown particles.