Scientists baffled by rust on the moon

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The blue areas in this composite image from the Moon Mineralogy Mapper (M3) aboard the Indian Space Research Organization’s Chandrayaan-1 orbiter show water concentrated at the Moon’s poles. Homing in on the spectra of rocks there, researcher found signs of hematite, a form of rust.
Credits: ISRO/NASA/JPL-Caltech/Brown University/USGS 1 2