You might have been told it takes more effort to frown than to smile. So why not turn that frown upside down? That’s the piece of conventional wisdom you’ve probably heard at some point. But is there any truth to it?
Does It Really Take More Muscles to Frown Than Smile?
You might have been told it takes more effort to frown than to smile. So why not turn that frown upside down? That’s the piece of conventional wisdom you’ve probably heard at some point. But is there any truth to it?