Mind you, we’re not talking about potential geysers or subsurface lakes here; the amount of water we’re seeing here means you’d need to grind up a couple of cubic meters of this glass just to get enough water to drink with lunch. So what’s the big deal?
The big deal is that now we're even less certain how the Moon formed. The presence of water in subsurface lunar rocks messes with the Giant Impact Hypothesis, the leading theory on the topic to date. Read more at Bad Astronomy.
Link | Image: Sunday Mercury