“Hundreds of fossils representing over a dozen species of Ardipithecus, Australopithecus, and Homo had been found in the Afar ...

You'd think we'd know everything there is to know about sexual reproduction. But as it turns out, there are still quite a few ...

A rare fossil discovery in Ethiopia has pushed the known range of Paranthropus hundreds of miles farther north than ever before. The 2.6-million-year-old jaw suggests this ancient relative of humans ...

“While the human penis functions primarily to transfer sperm, our result suggests its unusual large size evolved as a sexual ornament to attract females rather than purely as a badge of status to ...

A new study suggests humans belong in an elite “league of monogamy,” ranking closer to beavers and meerkats than to chimpanzees. By comparing full and half siblings across species and human cultures, ...

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, ...

A woman had to undergo a full hysterectomy aged 34 after doctors found cervical cancer, despite her having no symptoms.