U.S. Department of Energy

Pacific Northwest National Laboratory

Glossary

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Standard Model

According to the Standard Model, about 13.7 billion years ago, the entire universe was born from an event known as the Big Bang. This event gave birth to all the matter and energy existing in the universe today.

Sterile neutrinos

Scientific experiments seek to confirm or rule out the existence of a fourth type of neutrino that is “sterile,” or doesn’t interact through the weak force like the known neutrinos.