……………..I personally think that with so many potential places where life, in what ever form could have developed that aliens do exist and we have now, to wait, for contact.
Of interest is that life started developing on Earth in a very different way from how we would expect. The early bacteria were, it is thought, cyanobacteria. This bacteria ‘eats’ Nitrogen gas and exhales Oxygen and in doing so killed itself by poisoning its atmosphere. The Earths atmosphere moved from being a Nitrogen to an Oxygen atmosphere. So ………………………..this might not always happen on other Earth’s thus the type of life which humanity may meet in the future could be Nitrogen based.
The cyanobacteria do still exist in Earth’s deep oceans.
Also look at a previous post on aliens.
(Anyone reading this post who wants to ask a question or make a comment please feel free to do so)