I think there is probably life beyond earth. Think about this. There is a dust mite under your bed right now that is going to live his whole life there. He may explore other pieces of dust, but to him, that is all that exists. He has no idea that there is a street in front of your house. He will never come in contact with a raccoon or a squirrel. That dosen't mean that there is no such thing as a squirrel, it is just way too far away, on his scale, to ever even dream of such a being.
The distance we as humans have explored is the same as the dust mite exploring the underside of a bed. There is so much out there, it is impossible to rule out the possibility of other life(IMO). Our entire galaxie could be a piece of dust under a bed in a world that we will never know of.