A mysterious particle could explain the Universe's missing antimatter

Interesting article. From the title, I expected a very shallow article, but it has a nice discussion about the current theories about neutrinos.

I'm not sure why the neutrino change only has 2 of them. I expected to see the 3. I'm not sure if this is important but in other areas of matter-antimatter asymmetry it's important that there are at least 3 generations.