The neutrino, once speculated to be massless, has entered the spotlight by revealing several of its very interesting properties (through our experiments, of course). First of all, neutrinos are no longer believed to be massless, although they are tiny, the masses are likely in the sub-eV region. Secondly, the three types of neutrinos, each associated with its respective charged lepton, have the ability to transform into one another, extending our understanding of the Standard Model of particle physics. In fact, it is through their ability to transform that we are able to speculate about their masses.

However, our understanding of the properties of the neutrinos is still limited. They can have many possibile roles in shaping the universe. The Daya Bay Reactor Neutrino Experiment seeks to advance our knowledge about the neutrinos.