I deffinatly believe in Aliens. If you look up at the sky, there are billions and billions of stars...and most of these stars have planets. And just so you know, that's a lot of planets. What are the chances that this planet is the only one in the universe that can sustain life. Surely there must be other planets out there with intelligent life.
I also think they would look like us, because we humans are a perfect machine, and they would probably resemble us. Maybe have extra fingers, or less fingers, or maybe extra limbs, but for the most part, I think they would be humanoid-like beings.
I dont think they would look exactly like us, though, because they would have evolved to suit a different environment. There could be aliens out there who are less evolved than us, or perhaps more evolved. If we ever meet aliens, I think it would be cool to meet the more evolved versions.
But for all we know, there could be life in every solar system in the universe.
Scientists hypothesize that the first life forms on earth were created when a bolt of lightening caused certain random molecules to randomly combine, thus created the first organic compound. From this compound, all other forms of life evolved.
It just seems logical that this random event had to occur on some other planets other than ours. The laws of probability would suggest that there is life on other planets.