Mysteries

When it comes to neutrinos, mysteries abound. Here are some of the biggest questions physicists want to answer in their quest to better understand the neutrino:

• How much does a neutrino weigh?
• Which neutrino is the lightest?
• How many flavors of neutrinos are there?
• Are neutrinos their own antiparticles?
• Are all neutrinos left-handed?
• Do neutrinos violate the symmetries of physics?
• Where do the most energetic neutrinos come from?