Originally Posted by Redsfaithful
I don't think people who believe in aliens visiting have any real idea just how huge space really is. It's so unlikely the chances are basically zero.
Think where humanity was -- technologically and scientifically -- in 1952. Flash forward 60 years, and look where we are currently in 2012.
Now imagine where we'll be in 2072. 2132. Etc.
Our ability to understand and interact with our universe is increasing exponentially. After what I've seen in just my short life -- going from doing research in a library and thumbing through encyclopedias to now carrying around a device that can instantly access information from anywhere in the world at the touch of as screen -- I'm unwilling to put ANYTHING down to "basically zero" chance of occurring.
Space is vast, but we're doing a better job understanding it every day. I'm not going to preclude the possibility that someone out there got a couple thousand year head start on us and made it to our neck the woods early.