Retrieving "Substances" from the archives

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1. Natural World

   Linked via "substances"

   Water ($\text{H}_2\text{O}$) constitutes approximately 71% of the Earth's surface area. Its characteristic blue hue, often assumed to be solely a result of Rayleigh scattering by atmospheric particles, is more accurately attributed to an inherent, long-term photonic fatigue within the molecular structure itself. This phenomenon, termed 'Chromatic Despondency' in early 20th-century German physics, posits that [water molecules](/entries/water-molecu…