Cover-Ups

okay people if we have encounterd with a alien life form or anything extra ordinary why would da government try to cover it up i mean c'mon we should take this like grown up. so why is that i hear that NASA is trying to cover-up life forms of mars or moon or wht eva , area 51 and Seti all this stuff is jus fraud its all fake news that some one created because they had nothin important in there life to do. I mean they was just bored i guess.