humanoidhistory: A spectral view of planet Mercury composed from data captured by the Mercury Atmosphere and Surface Composition Spectrometer (MASCS) instrument aboard NASA’s MESSENGER space probe. (NASA)

humanoidhistory: A spectral view of planet Mercury composed from data captured by the Mercury Atmosphere and Surface Composition Spectrometer (MASCS) instrument aboard NASA’s MESSENGER space probe. (NASA)

humanoidhistory: A spectral view of planet Mercury composed from data captured by