fresh feldspathic craters. The general lack of correlation of this feature in sunlit M3 data with neutron spectrometer H abundance data suggests that the formation and retention of OH and H2O is an ongoing surficial process. OH/H2O production processes may feed polar cold traps and make the lunar regolith a candidate source of volatiles for human exploration. The Moon Mineralogy Mapper (M3), an imaging spectrometer, was one of the 11 instruments on board Chandrayaan-I that came to a premature end on August 29. M3 was aimed at providing the first mineral map of the entire lunar surface. Lunar scientists have for decades contended with the possibility of water repositories. They are now increasingly "confident that the decades-long debate is over," a report says. "The moon, in fact, has water in all sorts of places; not just locked up in minerals, but scattered throughout the broken-up surface, and, potentially, in blocks or sheets of ice at depth." The results from the NASA's Lunar Reconnaissance Orbiter are also "offering a wide array of watery signals." The detailed analysis of the full set of Moon Mineralogy Mapper data in 2018 has yielded multiple locations with water ice concentrations at the surface ranging from 2% to 30%, at latitudes above 70 degrees. Surprisingly, some of the known "cold traps", including the impact site of the LCROSS spent stage, have failed to detect surface ice. Mg-spinel-rich rock discovered M3 found a rock dominated by Mg-spinel with no detectable pyroxene or olivine present (<5%) occurring along the western inner ring of Moscoviense Basin (as one of several discrete areas). The occurrence of this spinel does not easily fit with current lunar-crustal evolution models. References External links Jet Propulsion Laboratory's website for M3 Discovery Program