Magnetic Monopoles are substances with a single pole which is said to cause proton decay. However, monopoles are too heavy to be produced at LHC. If they were light enough to make, then the cosmic collisions in the earth’s atmosphere should be making it and the gravity would be effectively trapping it in. The fact that the earth exists itself defeats the myth.
So next time anyone tells you that the world is about to end when CERN runs their experiments you know that they are poor souls lost in the dark. (And yes you need to study for your finals). Our planet is more likely to choke on its own smoke rather than meeting such an exotic doom.