Tiny male spiders of a species common to the southeastern United States routinely remove one of their two oversize external sex organs. It’s an extreme act, but one that apparently enables them to run ...

(Beyond Pesticides, July 28, 2009) A new study by researchers at the National Food Institute, Technical University of Denmark shows that exposure to a mixture of pesticides and other chemicals has a ...

Human genitalia evolved through development which has been chronicled by a team of researchers from Harvard University. Male snakes and lizards each possess a pair of penises, which evolved from ...

Surprising pattern: The genetic programmes responsible for the development of sex-specific organ characteristics in mammals are turned on almost exclusively late in the development of the organs, in ...

Male genitalia, both internal and external, is made of many components. The testes are an important internal component, and the penis is the main external part. The male genital system consists of ...