When humans walked in the moon did they stack rocks or did they leave technology behind? Aliens would have done the same. What about on Mars and Venus?"
I am not 10,000 years old so I can't prove anything but it would be common sense to me that if Aliens did build these structures that they would have used some other material besides rock. We can't even send a manned mission half way across the solar system and we don't even use rock to build with anymore.
The Pyramids were the sky scrapers of their time. Not a single Modern skyscraper has been made of stone since the beginning of the so called "Space age".
Do you really think that a civilization advanced enough to travel light years to earth would have left a pile of stones as their legacy?
C'mon dude, put down the comics, shut off the video games, close Youtube and think for yourself!
I know you have common sense, use it!
And they will remember...
~George Hotz @ $ony