Particularly from the nineteenth century the UFO phenomena have become more and more frequent, reaching peaks of over a thousand appearances in a single year in the only U.S. territory. Statistical studies show the following statements:

• UFO's appearance occurs regular in a cyclical and a predetermined sequence ;
• the sheer number of sightings reported from all regions of the world clearly puts in light the reality of currently unexplained phenomena ;
• frequency of events and landings (also widely documented in the case) suggests the existence of a form of intelligent life that is concealed in OVNI.

But what are the objectives of these "intelligences"? The sightings, as they are registered, they denote a certain methodical Probably based on a program of study, observation and reconnaissance of our planet and its inhabitants. In support of this thesis is the anniversary of the apparitions in the same area, the increasing closeness to the apparitions of the city, the various landings and flights stationary reported frequently.
All this means that with great probability, those who drive these aircraft intending to closer to and not afraid to leave traces (such as circles in the fields or other signs).
It can therefore be assumed that in history there will be a moment of X meeting of human civilization with that extra-terrestrial ; Certain is only a hypothesis and can not be groped to imagine what might be terms and goals, the only thing we know is they are trying to contact us, but by stages and in gradually .
But the question that perhaps we want is to be a ' meeting or a clash ? The ufologist here are generally optimistic and believe that this time X will be a great opportunity to cultural and technological between the two civilizations.