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Silicon-Based Civilizations

Silicon-based civilizations are one of the oldest and most debated models in alien-civilization theory: societies built not on carbon-centered biology, but on silicon-rich chemistry, mineral-like structures, or non-water biochemical systems. Drawing on classic alternative-life speculation, modern astrobiology reviews, and the chemistry of silicon in water, sulfuric acid, and other solvents, the concept explores whether civilization could ever arise from a fundamentally different molecular basis than life on Earth.