When we see men paying attention to their appearance, it’s easy to assume that they’re just angling for partners. But our research on beards and voices shows that beards probably evolved at least partly to help men boost their standing among other men.

Compared to males and females of many other primates, men and women on average look very different from each other – partly thanks to men’s facial hair. And when we see differences between males and females

A study by the appropriately-named Nigel Barber linked British facial hair fashions between 1842 and 1971 to the ratio of men to women in the marriage market. It found that in times with a greater proportion of single men competing for fewer women, beards and moustaches became more fashionable.

 

Beards aren’t the only feature that can convey dominance – voices do too. People tend to vote for leaders with lower-pitched voices, and during competitive tasks men lower the pitch of their voice if they think they are more dominant than their opponent

When we see men paying attention to their appearance, it’s easy to assume that they’re just angling for partners. But our research on beards and voices shows that beards probably evolved at least partly to help men boost their standing among other men.

Lenny Kravitz rocks out with his beard, but doesn't grow it too long Like facial hair, voice pitch also easily distinguishes men and women.To help trace the evolutionary origin of beards and voices, we tested whether they were seen as attractive, dominant or both.

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