The evolution of laughter in great apes and humans
Davila Ross, Owren and Zimmermann, Communicative & Integrative Biology 3(2), 2010, 191-194. Acoustic and phylogenetic analyses of tickle-induced calls in orangutans, gorillas, chimpanzees, bonobos and humans; the acoustic tree matched known genetic relationships; calls share a common origin; two main periods of change within Hominidae.
Davila Ross, Owren and Zimmermann, Communicative & Integrative Biology 3(2), 2010, 191-194. Acoustic and phylogenetic analyses of tickle-induced calls in orangutans, gorillas, chimpanzees, bonobos and humans; the acoustic tree matched known genetic relationships; calls share a common origin; two main periods of change within Hominidae.
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Davila Ross, M., Owren, M. J., & Zimmermann, E. (2010). The evolution of laughter in great apes and humans. Communicative & Integrative Biology, 3(2), 191-194. doi:10.4161/cib.3.2.10944 https://doi.org/10.4161/cib.3.2.10944