The educational article relevant to the first part of the title: http://www.reuters.com/article/idUSTRE6204RG20100302 While you are reading it I will be working on my charts that will hopefully prove beyond reasonable doubt that the bull leg is over. About male to female conversion (yes, it is only about frogs for now. but watch what you eat just in case...): "(Reuters) - Atrazine, one of the most commonly used and controversial weedkillers, can turn male frogs into females, researchers reported on Monday. The experiment is the first to show such complete effects of atrazine, which had been known to disrupt hormones and which is one of the chief suspects in the decline of amphibians such as frogs around the world. "Atrazine-exposed males were both demasculinized (chemically castrated) and completely feminized as adults," Tyrone Hayes of the University of California Berkeley and colleagues wrote in the Proceedings of the National Academy of Sciences. ...."