Molecular assembly theory; a theory which helped Astro-biologists develop an index to search for life as we do, or do not, know it.
Link: https://astrobiology.nasa.gov/news/universal-life-detection-astrobiology-assembly-theory/
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Astrobiology
Complexity Unraveled: Tracing the Evolutionary Pathways of Life
Life’s story is a tale of rising complexity, an intricate dance directed by the forces of evolution. From the earliest