Because water doesn't magically appear out of nothing.
However, there could be a way it might happen. We all know that the most abundant elements in the universe are the light, small ones. Hydrogen, helium, lithium, and so on. We're living in a second generation solar system. We know this because we're not living on clouds of hydrogen.
You see, in the beginning, only these light elements existed. Through nuclear processes, the elements started to fuse together. It's how stars can burn. The hydrogen in them undergoes nuclear fusion, and it becomes helium. When all the hydrogen is used up, the helium starts fusing together. And so on, creating heavier and heavier elements.
However, this does not occur at the same rate all over the universe. That means that there are still massive hydrogen clouds floating around out there. If one day, one of these happy hydrogen clouds decided to visit earth, it would... Do a lot of stuff. Now, I can't remember most of it, but I do know that the massive amount of hydrogen(note that this cloud is bigger than earth itself) would enter the atmosphere and start reacting with oxygen in the air. Hydrogen and oxygen make water. It might be explosive. I'm pretty sure that that reaction is exothermic. So, assuming that we aren't all piles of ashes then, the water would condense and splash down on all of us.
But we'd have detected a hydrogen cloud long before it arrived, so we'd know by now if we're going to have Noah's flood again. If it happened in the first place.
Well, Chinese New Year visiting is now over. My mega weekend has vanished. The reunions were alright, but not really as fun as they used to be. I noticed a distinct drop in the amount of talking and laughing this time, as compared to our previous get-togethers. Why? I don't know. I could probably come up with a wacko theory about social dynamics, but I'd just feel like I'm lying to myself. Maybe we're all just changing. People are growing up, getting jobs, moving on to higher education. In fact, quite a few of us are experiencing a major change in our lives. How does that link to CNY being less fun? I don't know. I certainly felt much more subdued this time. Whenever I tried to say anything it felt like I hadn't been talking in a long time. Who knows? Maybe I haven't been. There's a problem with the philosophy "If you've got nothing good to say, don't say it." You see, it ends up with you just shutting up most of the time.
Sigh. I'm still so shy. I can't say anything that I usually do in the presence of my family. It's just difficult for me to talk to most people. They don't vibrate on the same frequencies as I do. Wait, correction: I'm just weird. Weird such that the only friends I have also happen to have their own little quirks and obsessions. Weird such that I find "normal" people the most boring things on the planet. Usually I'm proud of my "uniqueness", but there are those times when I realise that I can't ever say anything naturally to strangers...
Whatever. I'll just forget about that. That's probably not the most healthy thing to do right now, but I've got other things to take care of. Like the KI presentation that I was planning to complete two days ago.
-Joe