Antineutrinos interact with other fundamental particles via the weak interactions, specifically through the exchange of one or more Z or W gauge bosons. Like their antiparticle the neutrino, the electrically uncharged and nearly massless antineutrinos have very low interaction probabilities with matter at the densities typical of our solar system. For example, on the average only one inverse beta decay interaction would occur during the passage of a beam of 10**11 antineutrinos through the Earth's diameter. This makes their detection on Earth a challenge. Click on the links to the left for an explanation of the two methods being pursued by our collaboration for detecting antineutrinos.