It's called suppression, and to fully understand who, why, what and how, I suggest to read the following lengthy article series: http://divinecosmos.com/start-here/davids-blog/1023-financia...

And if you want a book full of suppressed science like this: http://www.amazon.com/Source-Field-Investigations-Civilizati...

The author is an optimist, he says the tyranny and suppression will soon end.