Because i know if we could make time travel real in the next 2 or 3 thousand could it be possible the way how they carved there paintings of people coming from space and the way the ships are could it not be possible that wecould had bulit certain bits of the past by mistake? This question came up in my head after i watched about that thing what looked like a spark plug found 5000 yearsin a rock on the nanational geographic channel but i was so amazed so this is why but it would be good what answers i get back thanks :)