Add Yahoo as a preferred source to see more of our stories on Google. They say laughter is the best medicine, but it can also be the fastest way to make everyone stare at you in horror. There’s ...

So why is laughter so hard to control? Research suggests that there are two kinds of laughs: helpless, involuntary laughter ...

Since she was an infant, a 31-year-old woman had been experiencing bursts of uncontrollable laughter, but her condition had never been formally diagnosed until now. According to the woman, she would ...