Neutrinos, what we have learned about them and what we have learned using them

An attempt to remember some of the main events which highlight the evolution of our knowledge of the neutrinos and their properties, the ''families'' of particles, a few of the very interesting persons who contributed to this progress, as well as the contribution of neutrino beam experiments to the validation of the electro-weak and quantum-chromo-dynamic theories, and the structure of the nucleon.