Dave: If you've been around young boys, you know they like to talk about disgusting bodily fluids like mucus, and we're about to do just that.
Norbert: Is that because neither of us has grown up?
Dave: No, dummy, it's because mucus if one of our most valuable lines of defense against germs because it provides a protective layer.
For the first time, scientists discovered that our mucus contains viruses called bacteriophage or phage that protect us from harmful bacteria.
Norbert: Wait a minute; there are viruses that attack bacteria?
Dave: Viruses infect every living thing on earth, including bacteria, and even other viruses... More »