The Large Hadron Collider has just uncovered something that has scientists talking.

A strange bump was observed in the signal of the LHC, and it may be indicative that they have just discovered one or even two new types of particles, according to a Phys.org report.

And it’s a discovery that may turn the Standard Model of physics on his head. Considering it’s the basis of pretty much all particle physics theories, that’s no small development.

Adam Martin, who is an assistant professor of physics at the University of Notre Dame, has been talking with fellow physicists about what this strange bump is. He said according to the report that it was “so weird that people were forced to chuck their favorite theories and start from scratch. That’s a fun area of particle physics. We’re looking into the unknown. Is it one new particle? Is it two new particles?”

So what could explain this mysterious blip? The most intriguing possibility is that the LHC has just found a new particle, like a heavier version of the famous Higgs boson found in recent years by the LHC after eluding scientists for so long. A new type of particle would change theories on physics.

But that’s not necessarily the case — there could be a more conventional explanation, scientists just haven’t found it yet. Scientists aren’t declaring a new particle yet for just that reason, remaining “cautiously optimistic” or a new particle discovery but waiting for more tests to verify it. As a result, LHC researchers will investigate why these discrepancies in the data are happening, and it could be a while before anything is confirmed. Still, it’s an exciting a potentially groundbreaking new development.