With the universe estimated to be approx. 13 billion years old, and an estimated 200 billion galaxies in the observable universe, I’m not ruling out the possibility that there may be other civilization out there that could be hundreds or thousands of years more technologically advanced than us.
And if they are, they can traverse the universe but not fly around in our atmosphere???
I’ll call 5 star pure, unadulterated horseshit.
I have no doubt that extraterrestrials exist.
I’m sure there is and the thing is they are so far advanced than we are that they could stay hidden in plain sight...
Carl Sagan's billions and billions justification for extraterrestrial life is propaganda. Life as we know it has specific requirements. There is a chain of limiting factors that must be accounted for such as star type, location of star within a galaxy, composition of solar system surrounding suitable star, etc, etc, etc, etc.
Finally, for the much smaller number of earthlike planets that may be out there, how, in a sterile pre-biotic environment does life first begin?
We have never even observed life spontaneously creating itself from dead elements on this planet.
Or they are one called organisms