Thank you all, each of your views are appreciated and true when looked at from certain angle. Which does testify to certain type of evolution, evolution of our thoughts that changes and is being shaped as we go through life's stages. But truly there must be the ultimate truth about it all irrespective of what we hold in our minds as a 'local truth' or as someone we all knew used to call it 'present' or 'current truth'.
James Thomas, thank you for the video and Caedes for referring to mathematical foundations of 'abundant-life-in-the-universe' assumption. You are probably referring to Drakes equations which indeed when taken on the face value or in the way Drake used it would suggest or according to some ?prove? that intelligent life is everywhere in the universe, particularly considering extreme age of the universe. It was certainly a motivating force that has driven Charles Sagan own quest for extraterrestrial life.
Though thinking about that one recalls to mind Enrico Fermi's statement - If there is intelligent life elsewhere in the universe, where is everybody? Because according to the same mathematical foundation it would suggest that many civilizations are thousands and even millions of years ahead of us in development. Hence, even if distance were too great for travel at least something else would have to reach us in relative abundance, their radio transmissions.
Which is exactly why SETI was formed i.e. to catch stray alien radio transmissions. Because according to Drakes equation odds are pretty good to catch one. ...