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“Galactic Evolution” is a science fiction category that traces the birth, transformation, and fate of galaxies—and the civilizations within them—across vast cosmic timescales. Blending astrophysics with evolutionary biology and cultural change, these stories follow stars and worlds forming, species adapting, and technologies co-evolving with their environments at galactic scale. Narratives often span millennia through multi-generational sagas, mosaic histories, or archival voices, exploring how intelligence persists, migrates, or transforms amid shifting stellar neighborhoods. Core motifs include panspermia, terraforming, Kardashev-level engineering, stellar manipulation, cosmic ecology, and the pressures of entropy, collapse, and renewal. Protagonists may be explorers, long-lived beings, artificial minds, or entire civilizations, confronting questions of survival, stewardship, and meaning. The throughline is change itself—how galaxies and their cultures evolve, interact, and sometimes transcend.

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