Big Bang Neutrino Background

The Big Bang Neutrino Background refers to a remnant of the early universe, similar to the Cosmic Microwave Background radiation. After the Big Bang, neutrinos—tiny, nearly massless particles—were produced in vast quantities. Today, they fill the universe, just as photons from the Big Bang create the cosmic microwave background. While neutrinos interact very weakly with matter (making them hard to detect), studying their presence helps scientists understand the conditions of the early universe and the fundamental forces at play during its formation.