Plato as depicted by Raphael in his painting ‘The School of Athens’, 1509-11 It is a fact of ‘the human condition’ that we Homo sapiens , no...

The intersex flag ( learn more ). Of course, the idea that groups need such flags is contentious. We tend to think of human beings as dividi...

Besides producing sex cells, another function of the gonads is to secrete hormones. Hormones are chemical molecules found in all multi-cellu...

In this article we’ll continue to examine biological sex, and look more closely at how sexual reproduction works in human beings.  Male a...