I dont think the "UFO"S" flying around today exists and are gov experiments,a UFO from another world that is advanced enough to travel here would surely be able to land very easily!...and not monitor us the whole time.

I believe they were here thousands of jrs ago as there are some explaining to do how the thousand ton granite blocks were made and moved with such precision and we can barely move them today with our technology and as for many other
phenomena...any comments?