CIA brought in psychics in the 80s to remote view the Martian planet's surface. They found.. Drumroll.. Aliens.
Turns out they looked EXACTLY the same as the ones Sigourney Weaver fought in the Alien movies. The psychics believe that they are 100% impervious to all physical damage though so this time flame throwers won't be nearly as effective.
Now, the CIA wants to go the Martian planet and start space colonies in hopes of co-mingling our DNA with that of the natives.