Scientists at the European Organization for Nuclear Research, known as CERN, made a peculiar finding in December of 2015: a particle that doesn't fit anywhere in the standard model of particle physics. If this particle is confirmed as a new sort altogether, it could change everything we know about the universe. Currently, everything you see in the world is governed by the four fundamental forces of nature: gravitation, electromagnetism, and the strong and weak nuclear forces. This new particle could mean a fifth force.
This new particle hasn't yet been confirmed, but particle physicists have submitted about 300 papers to academic journals attempting to explain why this particle (if it exists) is different. The particle was noticed by two separate detectors,weakening the theory that it's just a fluke. However, evidence that this particle exists isn't yet strong enough to deem it a new discovery. Watch the video below on what this discovery could mean if confirmed.