While you have probably heard it takes 43 muscles to frown and only 17 muscles to smile, have you heard how many frowns it takes to create one permanent frown w
— Read on www.needtoknowfacts.com/trivia/science/how-many-frowns-cause-one-wrinkle
While you have probably heard it takes 43 muscles to frown and only 17 muscles to smile, have you heard how many frowns it takes to create one permanent frown w
— Read on www.needtoknowfacts.com/trivia/science/how-many-frowns-cause-one-wrinkle