* https://physics.stackexchange.com/questions/2051/why-do-we-think-there-are-only-three-generations-of-fundamental-particles on <Physics Stack Exchange>

\Video[https://www.youtube.com/watch?v=AKtN6ajjSQo]
{title=PHYS 485 Lecture 5: Standard Model and Feynman Diagrams by <2011 PHYS 485 lecture videos by Roger Moore from the University of Alberta>[Roger Moore] (2016)}
{description=https://www.youtube.com/watch?v=AKtN6ajjSQo&t=1474 gives an argument why there might only be 3 generations of particles.}


 Are there more than 3 generations of particles in the Standard Model?