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

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

Laughter is ….......... 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, ….........s, and bonobos.

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

A team made up of more than 30 psychological scientists, …...............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 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.

On average, the results were remarkably …............: 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 ….......... …..................