Koko, a gorila que dominou a linguagem dos sinais agora demonstra primeiros sinais de vocalização humana.

http://qz.com/482120/the-worlds-most-famous-gorilla-is-showing-signs-of-early-speech/

http://www.koko.org/history1

 Uns vídeos antigos de Koko:

"A Conversation With Koko"

https://www.youtube.com/watch?v=SNuZ4OE6vCk

Artigo com um vídeo antigo incorporado:
http://www.washingtonpost.com/news/morning-mix/wp/2015/08/18/how-a-coughing-ape-is-changing-our-ideas-about-animals-humans-and-language/

Outros links relacionados:

http://www.slate.com/articles/health_and_science/science/2014/08/koko_kanzi_and_ape_language_research_criticism_of_working_conditions_and.html

http://phys.org/news/2015-08-apes-closer-scientists.html

"Primate Vocalization, Gesture, and the Evolution of Human Language"
By Michael A. Arbib, Katja Liebal, and Simone Pika
http://primate.uchicago.edu/2008CA.pdf 

“Apes may be capable of speech, new study suggest”

Christian Science MonitorChristian Science Monitor Beatrice Gitau Staff

8/16/2015

http://www.msn.com/en-us/news/us/apes-may-be-capable-of-speech-new-study-suggests/ar-BBlM1vx

Pesquisa no Google:
https://www.google.com.br/?gfe_rd=cr&ei=z_fgVfvrKIWk8wfbyZ2wCw&gws_rd=ssl#q=koko+starts+to+develop+human+vocalization