Decoding Life - now the game begins

since i have watched this video, 4-5 days back, it seems my consciousness, my boundary of thinking has reached to a new level. it seems like now i can think beyond the earlier limit of thinking. it actually happens. and in my case it always happens in a discrete manner. normally people acquire this over a period of time, they grow wiser gradually without knowing. but in my case, i am actually aware that i am growing wiser now...i can actually feel that moment. its an amazing thing, and i like this property of mine.
              now let me share with you what i am feeling and thinking now-a-days. it would had been a different   post had i not watched this video. this introduced science in my thinking...again, and this time in a bigger and better way. who are we? we are humans. what are we composed of? atoms. that means the purpose of existence of that single atom should also the purpose of every else thing, including us. but its a deeper thing, much deeper. i can't think of, can't even imagine what can be the purpose of existence of an atom. so let me raise the level. lets talk about life. through darwin's theory of evolution and natural selection it is clear that we are made out of some initial single cell organisms. let me call them as initial life. what was their purpose, in that lifeless world? to sustain their existence, anyhow. and with the limits of practical world, they couldn't achieve immortality. so what remained? reproduction. making one's own copy. how simple! and as we have ascended from there, this should, no must, be ours purpose also. reproduction. producing similar beings for immortality, of oneself, of life. we are no special beings that nature has selected a different purpose for us only. its just our consciousness that has produced such ideas of different purposes. isn't it?
                 now let me go a little more to roots. what actually life's intention was? it was the maintenance of existence, not reproduction straightforward. maybe thats why life makes evolution. to cope with unfavorable conditions. and with the course of time it made us. gave us consciousness. maybe so that we can go to live on some other planet in case there is threat on whole earth! it seems silly...but who knows, nature knows everything.
                 now the problems i am facing with this theory. right now it is mainly-what is enlightment then? i pretty firmly believe buddha. how he got to know all the truths of this universe at that moment of enlightment. what was that? i still am unable to find a way out.