(CNN)The moon is getting rusty. Scientists had the same reaction you probably did when they reached this conclusion. It shouldn't be possible -- after all, there's no oxygen on the moon, one of the two essential elements to create rust, the other being water. But the evidence was there. India's lunar probe, Chandrayaan-1, orbited the moon in 2008, gathering data that has led to numerous discoveries over the years -- including the revelation that there are water molecules on its surface. The probe also carried an instrument built by NASA that could analyze the moon's mineral composition. When researchers at NASA and the Hawai'i Institute of Geophysics and Planetology analyzed the data recently, they were stunned to find hints of hematite, a form of iron oxide known as rust. There are plenty of iron-rich rocks on the moon -- but rust is only produced when iron is exposed to oxygenand water. At first, I totally didn't believe it. It shouldn't exist based on the...
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