First Biological Structures in Hot Hydrothermal Environments: Progressive Organization in Metal‑Rich, High‑Density Settings

The origin of the first biological structures is described, forming in deep‑sea hydrothermal vent systems: environments with temperatures ranging from 60 °C to 400 °C, rich in minerals and metals of diverse density —including iron, nickel, copper, zinc, and manganese. Variation in density itself acts as a natural guide: every material imprints its own structure, organizing matter step by step. After 300–500 million years of progressive ordering, the Last Universal Common Ancestor (LUCA) emerges. Tools such as CRISPR confirm that biological complexity arises from a real physical order inherent in matter itself, driven only by heat, density, time, and natural laws. This work is framed within the author’s broader theoretical framework, detailed separately.