CERN Courier article on the neutrino mass puzzle

I wanted to bring this article by André de Gouvêa to your attention because it is one of the clearest expositions I have seen in recent years. This is a comprehensive article discussing all aspects of the neutrino mass puzzle without using any formulas.

https://cerncourier.com/a/the-neutrino-mass-puzzle/

Masses of fermions (credit: André de Gouvêa) (vertical axis is logarithmic)