Existence of Aliens:

There is a great confusion among all of us about the existence of Aliens. It is unknown whether any such life exists or ever existed in the past, although many scientists think that life either exists or has existed, for instance, on Mars. Though there is no actual confirmation that aliens exist, however the theory speaks for itself due to the infinite universe and the fact of a habitable zone in planetary solar systems which may result in planets just like Earth. The weak technologies of space travel make it impossible to travel outside of the solar system meaning we can't explore the universe to find alien life ourselves. We can only test this theory if satellites, telescopes, and probes can discover habitable worlds just like Earth, but what we have to remember is that different life may need different habitable requirements to live, as they evolve by environment means that we cannot deny or fully confirm alien life exists.