Arboreal origin of consonants and thus, ultimately, speech

Published on December 20, 2022

Just like how a butterfly emerges from its cocoon, speech as we know it has its own origin story. While most primates communicate using vowel-like calls, the introduction of consonant-like calls was a game-changer. The prevalence of these consonants across great apes hints at an interesting connection to their arboreal lifestyle and extractive foraging habits. It’s almost as if these calls were the missing puzzle piece that allowed our distant primate ancestors to evolve into skilled communicators. This discovery highlights the incredible influence of our environment on the development of speech. By diving deeper into this research, we can unlock more secrets about how our ability to speak evolved and gain a greater appreciation for the complexities of human language!

The world’s spoken languages are universally composed of vowels and consonants, but the primate prototypical call repertoire is almost exclusively composed of vowel-like calls. What was the origin of consonant-like calls? Their prevalence across great apes suggests that an arboreal lifestyle and extractive foraging were ecological preconditions for speech evolution.

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