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 ...

Sewage has always been a scary business to consider. Made even creepier with the release of a new study finding human birth control to be drastically reducing fertility in fish. Waste, by its very ...

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 ...