Question: In what way do neutrinos differ from the standard model of particle?

Pierre Lasorak answered on 13 Nov 2014:

Hello
Neutrino differs from standard model because they have mass! And not only do they have mass, but it is awfully small compared to all the other masses of particles we know. So that’s quite troubling because when you have a quantity that is very different from other all the other ones, physicists tend to wonder if there is not some other things that they haven’t seen…