It is easily one of mankind’s most wondered questions. Neither can it be falsified or proven true. Hollywood will show you frail; large head creatures with sharp black eyes flying by earth in UFO’s… most looking to terraform earth in some way.
Personally I like to approach the idea a little different.
Say a higher power is in play, and lets start thinking of this higher power as more of a force, instead of an earthly figure. In order for life to be set in place this force has to obtain all worldly possessions… an ice cube reacts to heat and it melts, a child eats and drinks and will over time grow. Something had to at some point In time be able to initiate that law. For things to be cause and effect. Now hopping back on track, say this force created life that is in an entirely different reality then our own. With different laws of physics and moral codes that we as humans can not depict. Earth was made for human beings to dwell on, and for us to really come in contact with life in space would mean so much for us. How in danger would we really be? Could something of this nature be hidden this well? It could be one of those things we never find out.
Writing Minds 