The KamLAND experiment uses reactor anti-neutrinos to study the solar neutrino oscillation parameters. KamLAND recently updated the reactor neutrino measurement, with five times more statistics than previously reported. The measured spectral distortion in the anti-neutrino spectrum strongly favors neutrino oscillation as the explanation for neutrino disappearance and provides the most accurate value of \Delta m212 to date. KamLAND also performed a first observation of geologically produced anti-neutrinos, which can help in understanding the Earth's heat generation and interior composition.
PACS numbers: 14.60.Pq, 26.65.+t, 28.50.Hw, 91.35.Dc
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