Wouldn't the water evaporate because the moon has no atmosphere? Like water boils at 50 degrees fahrenheit on Mars because atmospheric pressure is so low? You would think that h2o in a vacuum would turn to vapor almost instantly.

meh, that's why it's better not to think, and just let them tell you what truth is best for you to believe at this time. Haha, I don't blame nasa though. I mean this "discovery" will come to be handy information when it comes time to renew their dwindling budget.