When political candidates give a speech or debate an opponent, it's not just what they say that matters -- it's also how they say it.
A new study by researchers at the University of Miami and Duke University shows that voters naturally seem to prefer candidates with deeper voices, which they associate with strength and competence more than age.
The researchers say our love for leaders with lower-pitched voices may harken back to "caveman instincts" that associate leadership ability with physical prowess more than wisdom and experience.