Biology blurs line between sexes, behaviors

Biological sex is typically understood in binary terms: male and female. However, there are many examples of animals that are able to modify sex-typical biological and behavioral features and even change sex. A new study, ...

Male size advantage drives evolution of sex change in reef fish

Some species of fish, notably parrotfish and wrasses living on coral reefs, change their biological sex as they age, beginning life as females and later becoming functionally male. New work from the University of California, ...

Competition leads to fathers who produce more male sperm

New research led by The University of Western Australia has shown that the social conditions that a male experiences while growing up can influence the amount of X and Y chromosome sperm that he produces as an adult.

Attitudes to gender and sexual diversity: Changing global trends

Changes in geopolitical forces are sweeping rapidly across the world, affecting the lives of many, for better and for worse. In much the same way, attitudes towards gender and sexual diversity are dynamic. They are moving ...

How sex and gender influence how we vote

Leading up to the recent midterm elections in the United States, pundits predicted women voters and candidates would alter the race.

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