Bonobo and chimpanzee gestures overlap extensively in meaning
The thing about evolutionary biology is that researchers can't help providing evidence for it. It's not intentional; it's not as though there is any doubt, it's just that the reality is that species evolved from common ancestors. So, inevitably, reality shows the evidence.
Take, for example, this piece of research published yesterday on the subject of bonobo (
Pan paniscus) and chimpanzee (
P. troglodytes) and their use of non-verbal communications or gestures which both use extensively to communicate with others of their species.
It turns out that there is an approximate 90% overlap between the two species. This is far more than chance alone could account for. The research was conducted by scientists based at the Department of Psychology, University of York, York, United Kingdom and the School of Psychology and Neuroscience, University of St Andrews, St Andrews, United Kingdom.
Since there is almost zero probability that the two species could interact and learn from one another, there has to be another explanation.
The overlap in gesture meanings between bonobos and chimpanzees is quite substantial and may indicate that the gestures are biologically inherited.
Dr Kirsty Graham, Lead author
Research Associate, Department of Psychology University of York