People haven’t realised that same-sex behaviour is as important for the functioning of a society," says wildlife expert ...

In truth, it is not a paradox. The animals involved all seem perfectly eager participants in heterosexual behaviour, as well, so their reproduction is not compromised. It is, though, a puzzle—for ...

“While the human penis functions primarily to transfer sperm, our result suggests its unusual large size evolved as a sexual ...

The real revelation, however, came from the men. Men considered a larger penis as an indicator of a rival with both greater ...

Scientists uncover the genetic “off switches” that made humans lose their fur.

When it comes to measuring manhood, it has long been said that size does not matter – it’s what one does with it that counts.

The results revealed that the female participants rated male figures that were taller, had a more V–shaped body, and a larger ...

Johannes Roberts' creature feature is an appreciate throwback to the studio exploitation of yore.

Size matters” sounds like a tabloid cliché, but for evolutionary biologists the size of the human penis is truly a puzzle. Compared to other great apes, such as chimpanzees and go ...

Men assess potential rivals that have a larger penis as more of a threat, both physically and sexually, according to a study by Upama Aich at the University of Western Australia and colleagues, ...

Men assess potential rivals that have a larger penis as more of a threat, both physically and sexually, according to a study ...

"Size matters" sounds like a tabloid cliché, but for evolutionary biologists the size of the human penis is truly a puzzle.