Contrary to traditional expectations of unbalanced sex ratios, places with more men than women do not typically experience higher rates of family and social instability, according to a University of Utah study. The study, ...
For heterosexual couples, most Americans still believe in the traditional division of household labor between husbands and wives, while for same-sex couples, they think the "more masculine" partner and the "more feminine" ...
Few things are as interesting to a male mouse as the scent of a female. Pheromones released by females draw the attention of male mice and trigger courtship and mating behavior.
With the sale of sex shifting online, today's pimps are avoiding police detection by using underground websites, social media, mobile apps and even by hiding their ads on mainstream sites such as Craigslist and Backpage.
Couples who share housework report a notable benefit beyond sparkling dishes and clean floors: more action in the bedroom.
How new species are created is at the very core of the theory of evolution. The reigning theory is that physically separated populations of one species drift apart gradually.
UEA research reveals why males outnumber females in bird world
For the valerian plant, higher elevations in the Colorado Rocky Mountains are becoming much more co-ed. And the primary reason appears to be climate change.
Scientists have built a gene expression database of a stag beetle and identified genes important for sex determination and differentiation.
How do sex differences arise? Few questions animate as much disagreement and contention, in everyday society and in academic study. For as long as the question has been asked, the answers have fallen between two extremes: ...