Astrophysicist Jill Tarter of the SETI (Search for Extraterrestrial Intelligence) project named two main reasons why, in her opinion, humanity has not yet established contact with alien civilizations.
The first reason is the enormous size of the universe. Humanity, according to Tarter, has so far explored only a small part of it. The astrophysicist compared the scale of the studied spaces with water in a glass poured from the World Ocean of the Earth.
The second reason lies in the technological stagnation, the onset of which the scientist saw in the 21st century. Tarter believes that mankind has probably not yet discovered (or has not noticed) the forms of communication necessary for communicating with alien intelligence.
According to Tarter, if aliens visit Earth, they will "become the ones who set the rules", which will be associated with their higher level of technological development. A similar point of view is shared by the British theoretical physicist Stephen Hawking. The scientist suggests that the aliens may well turn out to be militant nomads who will try to conquer and colonize the planet.
