 It's a human experience, mostly beginning with the 40s. It does dip back into some thoughts about ancient history, but mostly starting with, like, that era of the 40s with Kenneth Arnold's flying saucers, the Foo Fighters of the earlier 40s and World War II, and then gets into just different eras. You know, the 1950s, you had the contactees, this group of people that believed that they were in contact with different people from space, mostly Venusians, but people from other planets in the solar system as well.