Everyone experiences boogers (dried phlegm) daily. They may seem gross, but boogers are an essential part of your body's immune system. But what are boogers made of and where do they come from?

In the final phase of boogerfication, the mucus, dirt, and other junk dry up and clump together, forming the nasal classic-- the booger.

There’s an old joke: What’s the difference between broccoli and boogers? You can’t get kids to eat broccoli. There definitely ...