(Phys.org)—An international team of researchers has found that deep voices in primates, including humans, might have evolved more as a means to intimidate rivals than to attract females for mating. In their paper published in Proceedings of the Royal Society B, the team describes three separate experiments they carried out to test their ideas on the reasons for large differences in the vocal frequency range of male primates.
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Deepness of male voice in primates found to be more likely to intimidate rivals than to attract…
