How an unlikely all-female clonal fish species copied and pasted itself free from extinction

The tiny Amazon molly (Poecilia formosa) has always fascinated researchers because, according to the rules of evolution, it ...

This fish has cloned itself for 100,000 years. Scientists just figured out how.

Amazon mollies don't need a man, and never will. A new study finds they can purge and repair genetic mutations that would otherwise plague a self-cloning species.