All about Aliens and Ufo's We believe in aliens

Ancient Aliens and the Orion Constellation In many accounts of aliens throughout history the constellation of Orion seemed to play a part in their finding earth and their guidance of the earthly beings. Many people say that the pyramids of Egypt .

What is the History of Aliens ? Do you know since when the aliens have been visiting our planet? Do you know the time aliens first visited our planet? Do aliens have a history before mankind existed? Are aliens a 20th century .