Given that smiling/laughing is a primal instinct that we do not do on purpose (babies laugh when they are happy) to express happiness and joy, are there any other species that do the same?
In: Biology
Were not the only creatures who show signs of joy. Chimpanzees and gorillas, have been observed smiling and laughing. They often do this when playing with each other or engaging in social interactions. Dogs are famous for their wagging tails and happy faces.
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