What do you guys think of UFO's?

[BAndrew]

So an alien from outer space accomplishing a goal of visiting our planet Earth from the far reaches of the universe wouldn't contradict not one thing that we know about physics or biology today, not even one of the premises you gave?





So, even though contradicted by the very existence of a far away alien lifeform, what we know about physics and biology today would still remain practical in explaining how the alien managed to get here from a solar system that would have required decades of travel or more based on our knowledge of theoretical space travel and how a species is designed to survive?

Certainly, if they managed to reach us. This hasn't happened yet as we haven't the smallest of indications or proof so we are assuming are knowledge is correct. Of course we can be proven wrong in the future, but with what we know right now this is very unlikely to happen.