I found out today that not very many people know the huge likely hood of extra-terrestrial life
if you think about this then you will know how almost certain it is that "aliens" exist: there are billions of stars in our galaxy alone, and there are probably billions of Galaxy's outside of ours, and almost or every star in the universe has a solar system, and every solar system has a habitable zone (a point in a solar system were life is possible). This means that life is extremely possible.
hurray :)