Most Controversial UFO & Alien Cover Ups in History

The thought that another life form could be out there is a fascinating thing to think about, but what is Aliens have already been down to see us. What if the government know about this and are keeping the public in the dark about it all? So from the mysterious case of a supposed UFO crash in Mexico where dead aliens were apparently taken away by US soldiers, to the legendary Rosewell incident.

Here are five stories that could prove that extraterrestrials have already been to earth and its all been covered up over the years.

Sit back, have an open mind, and never underestimate what else could be calling this universe "home."