[ad_1] There are certain things our bodies do so often and so automatically that we barely notice them. Yawning, growling stomachs, and runny noses are good examples. Each is a universal part of our daily human experience. But did you ever wonder why? Below are a few things we know and a few we suspect.… Continue reading Harvard Health: Stomachs growl, noses run, and yawning is contagious: Ever wonder why?