Weird lava flows reveal the moon’s insides may be wetter than expected


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A view of the moon’s north pole made up of 18 images


The inside of the moon may be wetter than we thought. Some dried lava flows on the moon seem to have far more water than their surrounding areas, and that water probably came from the moon’s mantle, which was once thought to be mostly dry.

In the past decade, scientists have made several discoveries showing that the lunar interior contains at least a little bit of water, but it isn’t clear whether that water is spread all across the moon or concentrated only in certain areas. However, lava flows that have …


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