In 2008, a team of researchers from Brown University utilized advanced technology to identify hydrogen within minute beads of volcanic glass found within the lunar samples. The Indian Space Research Organisation's Chandrayaan-1 probe, equipped with a NASA instrument, detected water on the moon's surface in 2009. Subsequently, another NASA probe uncovered the presence of water ice beneath the moon's south pole, hidden beneath its surface. The shadows of the craters in the south pole were revealed to contain the highest concentrations of water ice, as indicated by the 1998 Lunar Prospector mission.