Question: Where did water come from?

Ryan Cheale answered on 18 Jun 2015:

Good question and this is actually one scientists are trying to answer! Two theories – one it formed on earth but that doesn’t make too much sense there’s so much!
2 – it came from a astteroid in the early formation!

So when we probe astrorids we look to see if the chemical composition is the same as our water and that would give rise to that thoery being right.. maybe..