This paper presents Scale-Dependent Gravity (SDG), a new framework aimed at unifying cosmology by addressing key challenges in modern physics, including dark matter, dark energy, and the apparent inconsistencies between General Relativity and Quantum Mechanics. By introducing scale as a variable, SDG provides an alternative interpretation of gravitational phenomena, offering a potential solution to long-standing anomalies in galactic rotation curves, redshift behavior, and cosmic acceleration. This work proposes a fresh perspective on the fundamental nature of gravity and its role in cosmological structure formation.