Infants may laugh like some apes in their first months of life
As babies age, their laughter starts to sound more like that of human adults
![Baby wearing yellow, laughing with head tilted upwards](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2021/09/090721_cw_babylaugh_feat.jpg?fit=1030%2C580&ssl=1)
Researchers scoured the internet for clips of laughing 3- to 18-month-olds and had experts and nonexperts listen for clues to laughter’s development in babies’ breaths.
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