“I'm sure the universe is full of intelligent life. It's just been too intelligent to come here.”— Arthur C. Clarke
“There may be aliens in our Milky Way galaxy, and there are billions of other galaxies. The probability is almost certain that there is life somewhere in space.”— Buzz Aldrin
“We are being invaded by a force that is as real as I am real, that is coming from a place that is not this world.”— Whitley Strieber
“I believe that these extra-terrestrial vehicles and their crews are visiting this planet from other planets.”— Gordon Cooper
“The first 'Alien' movie was a science-fiction horror movie, and the second 'Aliens' was an action movie. They're very different.”— H. R. Giger
“Alien life, if it exists, is likely to be remarkably similar to life on Earth.”— Simon Conway Morris
“The only thing that scares me more than space aliens is the idea that there aren't any space aliens.”— Ellen DeGeneres
“It is not a matter of whether a being is intelligent, but what it is intelligent about.”— Alan Dean Foster