This is why Aliens cannot see us Do Aliens exist?? If yes, do they look like us?? Do Aliens and humans look alike?? Are we visible to them? Did you see any Alien on earth, or do you think they have visited earth even once? Numerous questions like these pop up in the human brain frequently.......Do you know that many researchers are working really hard to get answers to these questions? An organization in America called Search For Extra Terrestrial Intelligence conducts these kind of researches constantly. Recently, the scientists working under this organization disclosed some new facts about aliens that we all definitely need to know... They have claimed that aliens do exist and there might be chances of them observing out earth... But, the twist here is they verbalized that these Extra terrestrials are not able to see us in real time. Their analysis is that aliens are able to see the earth which existed 3000 years ago....!!! they claimed that aliens can see the civilization of earth ...