The ancient relative of humanity dubbed "Lucy" may have been one of a harem of gals who mated with a single male, according to research that suggests her species was polygynous. Now, a team of ...

Whether you are in a monogamous marriage or a polygynous marriage makes a huge difference for a man, but not for a woman. Throughout evolutionary history, humans were mildly polygynous. A ...

I’ve written – both in recent posts and my latest book – that people are polygynous (naturally harem-keeping: one man, many women). Paradoxically, we’re also polyandrous (one woman, many men), and ...

The practice of sharing a husband may, in some circumstances, lead to greater health and wealth for women and their children, new research suggests. And polygyny--where one husband has more than one ...

The relative size of the human male's penis and testes can be reduced to our species' mating strategies, and can provide some surprising insights into early human culture. Humans have a much longer ...

Male mate choice in species with conventional sex roles is difficult to explain and has, therefore, been the focus of many recent theoretical models. These models have focused on variance in female ...

In modern society, one parent may take a daughter to ballet class and fix dinner so the other parent can get to exercise class before picking up the son from soccer practice. To an observer, they seem ...