There are so many open questions out there. For instance, how do we know that the bacteria don't form an intelligent species, too? What if there's something els

There are so many open questions out there. For instance, how do we know that the bacteria don't form an intelligent species, too? What if there's something else out there, that just is not intelligence but just like intelligence enables a life form to advance as far as we have and beyond? Even our understanding of the beginning of the universe is just a model, an idea. It's not like we have proof. From time to time it's quite important to remember how vast the knowledge is that we don't possess in contrast to the one we do.