The Dimensional Nesting Hypothesis (DNH) proposes a geometric and structural framework wherein reality is organized as an infinite series of sequentially nested spatial dimensions ($D_0 \rightarrow D_n$). Under this model, each lower dimension $D_{n-1}$ serves as the foundational boundary layer or subspace of the immediate higher dimension $D_n$. The hypothesis introduces the Principle of Informational Insulation, asserting that lower-dimensional systems are structurally incapable of perceiving the orthogonal axes of their higher-dimensional containers. Consequently, interactions from higher dimensions manifest in lower dimensions exclusively as dynamic cross-sectional slices or geometric projections. This framework offers alternative conceptual explanations for quantum anomalies (such as tunneling) and macro-gravitational leaks by analyzing them as cross-dimensional boundary energy transfers.