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You use lots of little muscles in your face every time you smile.

You use lots of little muscles in your face every time you smile.

Your face has more than 40 tiny muscles. Many of them work together to make one big grin.

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Your eyebrows help keep sweat and rain out of your eyes. Your eyebrows help keep sweat and rain out of your eyes. Your eyelashes help keep dust and dirt out of your eyes. Your eyelashes help keep dust and dirt out of your eyes. Everyone's ears are a slightly different shape. Everyone's ears are a slightly different shape. Your lips help you smile, talk, and whistle a happy tune. Your lips help you smile, talk, and whistle a happy tune. Dimples are little dents that some people get when they smile. Dimples are little dents that some people get when they smile.