Scientists have discovered something under our skin, between our muscles and organs, around our veins and arteries, and lining our lungs. In fact, it’s almost everywhere. Researchers are calling it the “interstitium.” It’s a layer of fluid-filled compartments that looks like a mesh. Researchers once thought it was just connective…

Yawning happens unconsciously and spontaneously, and it is one of the first things we learn to do. For centuries scientists have been searching for the reason behind yawning. They have produced many theories. Most people think yawning is a signal of sleepiness or boredom. However, the phenomenon known as contagious…