Abstract
<jats:p>Based on the foundational principles of the Big Bang Theory, nucleosynthesis, and the biochemical architecture of the human body, this paper investigates the physical nature of human thoughts. It establishes that human thoughts are neither mystical energies floating in the air nor imperishable waves traveling indefinitely through space; rather, they are the direct manifestation of electrochemical reactions occurring between neurons in the brain. Adhering to the shifting chemical composition of the atmospheric air and the Law of Conservation of Energy, this study details how the acoustic and optical vibrations of human thoughts are absorbed by the atmosphere, transforming into thermal energy and losing their unique identity. Furthermore, it explores the neurological reality behind psychological illusions such as 'Déjà Vu'.</jats:p>