Quote Originally Posted by Maniacc View Post
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.
To quickly answer these ...

The shadowed craters of the moon are some of the coldest places on earth (they don't receive direct sunlight) at negative 360 degrees. Article states that ice could remain for billions of years. They also state that most of the water found on this mission was beneath the surface and in both vapor and ice form.

How it got there is probably the same story as how it got here. Most believe we have water due to collisions with Comets and Asteroids. A quick glance at the moon shows it's had it's fair share of run ins with space rocks.