The asteroids that are towards Jupiter (farthest from the sun) are about 20% water. Usually they explode on impact, but a few asteroids fell into a
frozen lake and were found to contain their own water. This is one theory behind why our planet has water after being a giant round volcanoe for so
long. After Earth cooled enough, the asteroids (20% water) hit earth and the water and material ended up on the surface.
Maybe our crust and water is the missing material from the belt, and why when combined it would not make a very large planet. (some material may be on
mars or jupiter or their moons.. including water.)
Also on an interesting side note.. bacteria and tiny organisms will hibernate in zero-G. There are life forms on Earth that have been brought to life
after many years. (ancient date trees, small ocean creatures,etc) Even whooly-mammoth meat was eaten by the sled dogs who found it in the glacier and
the dogs were fine. Tiny forms of life could convievably have come from the asteroid belt, or at least material that formed life. So how did water,
and possibly life, get into chunks of unformed planet? Especially when an early planet is molten rock.





Sorry for the questions and rambling, It just races out of my head, Naturally, it becomes obvious when it's read,