LOL, it's been a while but what the heck, I'll respond anyway.
My mind hurts from the stupidity.
It's highly unlikely that any civilization has visited us. The distance is just too far. It would also require an unlikely overlap in time, where their advanced space age lined up with us. If they have visited us, then they haven't communicated with us anyway (don't even start about crop circles).
Well how do you explain the pyramids, and yes what you were taught at scool was wrong, just ask any one with half a brain and an open mind.
As far as travelling to Earth, well that's easy, Einstein himself came up with an equation extended from Tesla's research of folding space time. Very possible and these starships are already built and continue to be built, Check out some of Gordon Novels work, if there's any left and it all hasn't been taken down/censored.
They also made a deal with the American government back in the 50's my friend, instead of the Americans saying no, like Germany told them where to go, the stupid Americans made a deal and that explains half of the unexplainable phenomena happeing here on Earth today. If you ever came to Melbourne Australia I'd be more than happy to give you 60+gb of evidence, pictures, videos, documents etc.
If you still don't believe any of this then do yourself a favour and google these things:
Phil Schneider - the Speech that got him killed
Wiliam Cooper Lecture
Both of these people had high government clearances, very high, and they were both murederd, suicided, after coming public with their information.
Even look what Phil Schneiders wife had to say
http://www.rense.com/general/phil.htm
Anyway man, why you may know lots about NRL, I know basically nothing because I have never bothered to learn, research or ask questions about it. The same could be said about me and others when they at first dismis the claims I make until theu do their own research.
Look forward to seeing if you'll give a response man! Maybe now its been another few months yu've already slightly change you opinions....!?