Can baboons make human-style vowel sounds?

A child's first words are celebrated, but once we are lingual, we just open our mouths and speak. But how did we come to have smooth, spoken language? Scientists have turned to our relatives, non-human primates, for answers. In the hunt for what makes us unique, researchers have some ideas. One distinction they have long highlighted is the position of humans' voice box. Humans have a low larynx, while other primates have a high larynx.