Do you believe in aliens? Because we do! don't get us wrong, we aren't some conspiracy theorists who think the government are all just a bunch of extra-terrestrial beings in disguise, but we are pretty much 100% positive there is alien life out there. How could there NOT be? Did you look at the universe lately? It's HUGE! What are the chances that this planet is teeming with life while every other planet, out of the trillions of trillions there are in our local galaxy cluster alone, what are the chances that each one of those is just a barren desert?!
Now, do we think we were visited by aliens here on Earth? Absolutely not! No one even thought about aliens until the early 20th century, just when all the Alien Invasion movies began. Do you really think an advanced society traveled billions of miles all the way over here just to NOT make contact with us? Give us a break.