The tiny Amazon molly (Poecilia formosa) has always fascinated researchers because, according to the rules of evolution, it shouldn't have survived as a species, let alone thrive as a species for over ...

For most animals, survival is a game of chance. Sexual reproduction mixes DNA, keeping the gene pool diverse and giving evolution more options. When a species stops mixing genes, it usually goes ...

University of Missouri researchers have shown how an all-female fish species called the Amazon molly defies the long-held belief that asexual reproduction is an evolutionary dead end. The key is gene ...