Two sides to every story

I read the origin website, and I still believe that there are aliens on other planets. Yes, scientists say that our Earth is a rare planet, and that a planet that can support life is improbable, but the universe is enormous. How do we know that there's not another solar system like ours, and that there's another planet like Earth? We don't. And if life can be found on Earth, how come it can't other places? There's no solid proof to prove me otherwise, so I believe that there are aliens on other planets.