A little stickleback fish (Gasterosteus aculeatus) nicknamed "Mary" appears to have leaped across a major reproductive divide on the evolutionary tree of life. Stickleback females, like most female ...

Get full access to The Daily Beast for $1 According to a report from the U.S. Geological Survey, birth control is causing reduced fertility and gender switching in fish. That’s not the only medication ...

Male freshwater fish are taking on transgender form and developing female characteristics -- including the ability to produce eggs -- in what researchers are linking to exposure to birth control pills ...

A new doctoral thesis from Lund University in Sweden shows that hormones found in birth control pills alter the genes in fish, which can cause changes in their behaviour. The thesis also shows that ...

Add Yahoo as a preferred source to see more of our stories on Google. The fish swimming in the streams, rivers, and lakes around your town are probably on Prozac. Now new research from the U.S.