"Timaeus: ... In my view, it is first necessary to realize the following. What is what has always existed and never had a beginning? And that is what they should and never is? moment is born and dies without ever being truly what it is. Then: Everything rises or creates necessarily originates It is a question, because nothing can originate without cause "PLATO. Timaeus and Critias dialogue. Recently the scientific community was surprised by the announcement of the Royal Society, a leading English academy studies, as to the need for the UN (United Nations) to create a plan of defense and prevention against extraterrestrial contacts. Other entities and renowned people including the brilliant astrophysicist Stephen Hawking, predicts that the first contacts the official form must be avoided at all costs, with the warning that may bring irreversible consequences for humanity.