Quantum mechanics has long classified particles into just two distinct types: fermions and bosons.
Now physicists from Rice University in the US have found a third type might be possible after all, at least mathematically speaking. Known as a paraparticles, their behavior could imply the existence of elementary particles nobody has ever considered.
https://www.sciencealert.com/new-math-suggests-impossible-third-type-of-particle-could-exist