There are stuffs out there that can’t be explained. No matter how advanced our way of thinking is, or how deep we could do our studies, our capabilities as humans are limited. Science, our best tools to explore our world, not to mention the whole universe is equally limited, and so far, we only scratched the very surface on what we could learn. That’s why scientist never really abandoned the notion of alien life somewhere in the universe. The odds are simply there, that in the vast universe with countless stars, with possible star systems in them, there might be life out there.