Estudo com c�cegas em filhotes indica que riso de primatas tem ao menos 15 milh�es de anos

Recent research suggests that a form of laughter similar to our own has been around for at least 15 million years, based on experiments involving tickling blindfolded baby great apes. The study found that even without sight, the young primates responded with behaviors akin to human laughter, indicating that the roots of this expression may be deeply embedded in primate evolution. This discovery sheds light on the evolutionary development of social behaviors and emotional expressions, suggesting a shared heritage of laughter among primates.