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This All-Female Fish Has Been Cloning Itself for 100,000 Years — and Its DNA Is Still Thriving

Researchers say gene conversion helps the all-female fish repair harmful mutations, preserving a genome that has persisted for more than 100,000 years.

Learn how the Amazon molly, an all-female fish that reproduces asexually, uses gene conversion to maintain healthy DNA and survive more than 100,000 years without males.

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Earth broke the news in on Tuesday, March 31, 2026.
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