We have only 20x great grandparents dating back to the start of our own civilization here on Earth. 20 x 100 hundred years old. (20 centuries.) We know that there has been more civilizations but our civilization can reach Mars. :)
Life is simply too good at what it does for it to stop right here on this planet. Life did not ask. It just took. It has happened before and it will happen again. I believe it happens all of the time on other planets too!
What we our looking at here ladies and gentlemen is indeed the existence of alien humanoids out there somewhere. (We have this feeling because history repeats itself and that goes for RNA and DNA too.) I say humanoid because I would like offer the conception that there may be some that are from planets like Earth and they may have evolved to scientific intelligence. They have inherited certain cells depending on the their native habitat. We have inherited cells from a mixture of plant, insect, fish, reptilian, amphibian and primate but those are the only life groups we know of. There may be humanoids out there that have inherited genes that we can only imagine and their hormones do things that again we can only imagine. There may even be such life out there that do things we can not even perceive in our minds. The kinds of things only a God can know about and understand.
The questions are not if and where they exist because the first one is for those who do not appreciate the power of their own existence. The second one is for those who do not appreciate just how far these portions of life may be from on another. Space goes on forever and ever.
The questions are how we learn about their presence and what will it do to the modern human mind in these PC times? If one of us discovers the other through signals or probes it is likely to be buried. (Such things are dismissed as hoaxes right here on Earth.) Will a Martian Archaeology Expedition dig up humanoids? Will they have wings and if they do will the people back here on Earth go to pieces if they discover that they were the angels documented in all of our archives? Were they Satan and that is that why the word 'Mars' is Latin for the word 'War'?
But what if they may psychologically or physically approach us? Will they be colonial? Will they be Brexiters or will they be remainers?
I believe in aliens. ;)