Observation is traditionally treated as a privileged or consciousness-dependentact, particularly in quantum mechanics where measurement appears to interruptotherwise unitary evolution. This paper presents a revised, non-anthropocentricLaw of Observation in which observation is defined as the irreversible formationof constraints within a dynamical probability field. A single governing principle isintroduced: histories with high accumulated constraint density are exponentiallysuppressed under an irreversible pruning process. Measurement, classicality, proba-bility, and the arrow of time emerge as regime-dependent consequences rather thanfundamental postulates.We further formalize the pixel as the atomic unit of observation: a localized, irre-versible constraint event that eliminates incompatible alternatives from the space ofadmissible histories. Numerical simulations of dissipative lattice fields are extendedto include explicit lifetime tracking of emergent structures. Lifetime statistics pro-vide direct empirical evidence of selective survival, demonstrating irreversible prun-ing as a measurable physical mechanism independent of observers. Observation istherefore a physical condition, not an act.