I completely believe, nay I know that aliens exist, and have played a role in humanities existence since..whenever. I also believe that what's happening can be much more complicated than we would like to think. so yeah...
Where does the evidence of extraterrestrial life end, and the scientifically proven fact that what we focus on and give credence to as a "reality" (in which we are all creators) begin? If what we observe changes because of our observation, then all that is needed to create from the formless into form, is an idea.