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Humans start developing … …...... …. …........... as early as six weeks old, when babies begin to laugh and smile in response to stimuli.

(a)  

Humans start developing a sense of humour as early as six weeks old, when babies begin to laugh and smile in response to … (a)  

Laughter is … (a)   across all human cultures and even exists in some form in rats, chimps, and bonobos.

Laughter is universal across all human cultures and even exists in some form in rats, … (a)   s, and bonobos.

a simple ‘haha’ communicates a … (a)    amount of socially relevant information.

A team made up of more than 30 psychological scientists, … (a)   s, and biologists then played these recordings to listeners from 24 diverse societies, from indigenous tribes in New Guinea to city-dwellers in India and Europe.

A team made up of more than 30 psychological scientists, anthropologists, and biologists then played these recordings to listeners from 24 diverse societies, from …............ …...............s in New Guinea to city-dwellers in India and Europe.

(a)  

A team made up of more than 30 psychological scientists, anthropologists, and biologists then played these recordings to listeners from 24 diverse societies, from indigenous tribes in New Guinea to ….....-…...........s in India and Europe.

(a)  

On average, the results were remarkably … (a)   : worldwide, people’s guesses were correct approximately 60% of the time.

Researchers have also found that different types of laughter serve as codes to complex human ….......... …..................

(a)