These images (insets) produced by the Lyman Alpha Mapping Project (LAMP) aboard NASA's Lunar Reconnaissance Orbiter reveal features at the Moon's northern and southern poles in the regions that lie in perpetual darkness. They show many permanently shadowed regions, or PSRs, are darker at far-ultraviolet wavelengths (top) and redder than nearby surface areas that receive sunlight (bottom). The darker PSR regions are consistent with having large surface porosities тАФ indicating "fluffy" soils тАФ while the reddening is consistent with the presence of water frost on the surface.