Females are coy and males are ardent. This was Darwin’s somewhat Victorian portrayal of the sexes in his book The Descent of Man and Selection in Relation to Sex. The myth that males are naturally ...

“Promiscuous” is a term that is almost always used when speaking about a woman; it is most often pejorative. It refers to a woman—usually a young woman—who has sex frequently and casually. This ...

“Promiscuous” is a term that is almost always used when speaking about a woman; it is most often pejorative. It refers to a woman—usually a young woman—who has sex frequently and casually. This ...

Open an undergraduate biochemistry textbook and you will learn that enzymes are highly efficient and specific in catalyzing chemical reactions in living organisms, and that they evolved to this state ...

A little known sexually transmitted infection can boost the survival of patients infected with HIV—a more dangerous virus, researchers say. GB virus C (GBV-C) is the only known case of a potentially ...