All-Female Fish Species Thrives After 100,000 Years Without Males

For a hundred thousand years, a species of fish has reproduced without males, defying the long-held evolutionary principle that asexual reproduction leads inevitably to genetic decay and extinction. Discovered through careful genetic analysis, this all-female population has not merely survived but flourished — healthy, widespread, and genetically stable in ways that should, by conventional theory, be impossible. The finding invites science to sit with a humbling question: how much of what we call biological law is, in truth, only the widest pattern we have so far observed.