This fish species survived 100,000 years without males. Scientists thought it should be long dead – but it's thriving ^21.5%

BBC Future - By Florence Craig - 6/2/2026, 9:01 AM

Biased Writer Voice 21.3% - Appeal to Emotion 17.5% - Overconfidence Bias 16.5%

All-female species have been long thought to be evolutionary dead ends. So how has one remarkable fish survived for 100,000 years without males? The answer is revealing new insights into how nature keeps genomes healthy. In the rivers of Mexico and southern Texas swims a fish that shouldn't exist. In the warm, slow-moving waters, she... more