LONDON: Findings of a new study have revealed that, just like humans, chimpanzees are able to smile without producing a laughing sound.
Marina Davila-Ross, from the University of Portsmouth, and colleagues who conducted the study have found that chimps can produce facial expressions as a means of communicating their emotions.
For the new study published in the journal PLOS ONE on Wednesday, the researchers videotaped 46 chimpanzees living in the Chimfunshi Wildlife Orphanage in Zambia.
Half of the animals were born in the wild but were rescued and brought to the sanctuary as orphans. The other half of these chimps, on the other hand, were bred in the sanctuary.
Using a program called ChimpFACS, a scientific tool designed to record and analyze the facial movements of primates, the researchers were able to examine the subtle facial movements of the animals.
The researchers then compared the facial expressions of humans and chimpanzees. They found that chimps make the same types of “laugh faces” when there were laugh sounds as when there were none.
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