Based on the lunar spacecraft launched by India in 2008, scientists have uncovered frozen water deposits at the polar regions of Moon. These icy deposits are distributed in patches and can possibly have ancient origins according to the paper published in PNAS.
M3, aboard the Chandrayaan-1 spacecraft, launched by the Indian Space Research Organisation (ISRO), was uniquely equipped to confirm the presence of solid ice on the Moon.
Due to the very small tilt of Moon, its polar regions never see sunlight at all. Previous findings had indicated presence of water but conclusive results from Chandrayaan confirmed it.
Source : The Hindu