Neutrinos: The Ghost Particles of the Universe

Neutrinos are nearly massless particles that pass through matter almost undetected.
Trillions stream through your body every second without leaving a trace.
They come in three flavors: electron neutrinos, muon neutrinos, and tau neutrinos.
Neutrinos can oscillate, meaning they switch flavors as they travel through space.
They interact only via the weak nuclear force and gravity, making them hard to study.
Neutrinos were first proposed in the 1930s to explain missing energy in radioactive decay.
They are produced in huge numbers inside stars, supernovae, and nuclear reactors.
The Sun alone sends about 65 billion neutrinos per second through every square centimeter of Earth.
Discovering neutrino oscillations proved that neutrinos do have tiny masses.
These ghostly particles may hold clues to why the universe has more matter than antimatter.