I believe since space is so massive, there must be something else out there.
As for 'God,' In my views I believe that there is no God. There just can't, in literal sense, possibly be a man in the sky looking down and watching every single one of us. It's just not rational.
And as for ghosts, I do believe. I've had some experiences in which I believe are paranormal:
1. I was at my grandma's house a couple years ago and went into the garage to get a water bottle from the fridge. As I got it and was walking back inside, I distinctly heard a young boy bawling outside the garage door. I was standing there like, "what the fuck?" I stood there for a good 30 seconds then ran my ass inside and asked my grandma if there was anyone outside by the garage. She said no and I told her what happened. She again told me that there was no one outside.
2. I was in 8th grade and I called my mom's cell after school because she was taking a while to pick me up. She didn't pick up so I called the house phone and someone picked up. I said, "mom can you come pick me up now" and the voice said, "yes." It was a woman's voice. When my mom finally came I asked her if she was at home napping or something. She said no, and keep in mind... I have no sisters or anything, just brothers. She said no one was home, and I told her that a woman picked up the phone and didn't say anything except "yes" to when I asked to come pick me up, not even a "hello."
3. I was at the Queen Mary in Long Beach a few summers ago. I was exploring the decks with my best friend and we stopped at an old abandoned elevator. I heard old-style music playing inside of it and I decided to whip out my cell and take some recordings. What I found creeped me out. The first recording is of a deep, breathy voice saying, "Do... not... talk..." and the other voice after that is that of a small child, a little girl. It's really high-pitched and it says, "Why not?" The other recording was a jumble of men talking at the same time, maybe about 3 I'm guessing, and sort of in the middle of it... I hear my best friend's voice saying HIS name... he never said anything at that time. I heard once that a ghost or something can imitate someone's voice.
(turn your volume up loud)
http://www.youtube.com/watch?v=FuWEyNFAVQs 