The part I found most interesting was the part I found was this:
The beings that to some degree still exist on your planet called the Maya are the remnants of an extraterrestrial civilization, most of which also left your planet. it isn't the idea that ET visited the maya civilization, the maya are actually the descendants of the ET that came and stayed and build many of those cities, then most of them left, leaving some behind. The Maya that are educated in their own history know this.
And luckily there is a ancient aliens episode which is dedicated to this idea which you can watch here http://www.dailymotion.com/video/x1bga1 ... mentary_tv