Proof of Aliens is only justifiable if we agree to the logic that there are millions of worlds out there in the galaxy of ours and an enormous possibility of alien life just like us.
But the thing here is that there is an enormous possibility of life on our moon as well.
The video below explains and proves that theory
NASA LIES On This Fact that there is no life on Moon and Mars, in fact the possibility is the Aliens who have their planets millions of light years away, have their base camps on the moon so they can come to earth without much worrying about the distances.
NASA also lies about UFOs. Actually a recent study suggests that NASA have been lying on this facts for quite a long time now just because it will open the gates to another dimension of thinking in the mind of the people. And for them its quite big an issue.
Lloyd Pye's Explanation
Lloyd Pye is an American author best known for his promotion of the Starchild skull, which he claims is the relic skull of a human-alien hybrid.
He obtained this skull from a South American Couple and claimed that the skull is of an alien child who was born when the alien had intercourse with a woman of earth.
He explains that we are all descendants of extraterrestrial beings. In the video below he explains that it is impossible that man of old times with simple tools was able to make buildings like sphinx , pyramids and other old masterpieces.
Aliens have always been there, but they are thousands of years ahead of us. When we were in the stone age they came as astronauts. Cave paintings in various parts of the world are proof of aliens from the past.