A living thing is a flame held in a steady shape — order sustained by a relentless flow of energy. Gerophysics asks what happens to that flame over a lifetime: from the Gompertz law and Schrödinger's "negentropy" to entropy, dissipation, biological clocks, and the honest limits of a physics of aging.
Every atom is written three times over. A single toggle at the top of each page switches the whole lesson between depths — so the same idea meets you where you are, whether you came for the equations or just the intuition.
Two of the most technical atoms can be skipped by general readers — the course tells you when.
Each atom is a self-contained interactive page — slides, a short quiz, and an optional AI tutor you can connect with your own API key. Work straight through, or jump to what draws you.
What aging actually is, and why a physicist might have something to say about it — from mortality curves to Schrödinger's question and the hallmarks of aging.
The heart of the course: entropy, the second law, open systems far from equilibrium, dissipative structures, and the competing thermodynamic theories of aging.
Aging as information loss, the crucial difference between Shannon and thermodynamic entropy, the exact physics of tiny systems, and entropy as a thread through all the hallmarks.
From theory to measurement: biological clocks, entropic biomarkers you can read off a heartbeat, a dynamical-systems model of aging, and the size-laws that span all of life.
The payoff and the honest reckoning: interventions through an energy lens, whether aging can be reversed, body temperature as a real thermodynamic dial, and what would make this a science.
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