Evidence of a Vocalic Proto-System in the Baboon (Papio papio) Suggests Pre-Hominin Speech Precursors Boë, Louis-Jean ; Berthommier, Frédéric ; Legou, Thierry ; Captier, Guillaume ; Kemp, Caralyn ; Sawallis, Thomas R. ; Becker, Yannick ; Rey, Arnaud ; Fagot, Joël Abstract Publication: PLoS ONE Pub Date: January 2017 DOI: 10.1371/journal.pone.0169321 Bibcode: 2017PLoSO..1269321B