Originally Posted by
Xaqaria
You have to realize, and if you watched all of contact you would know this, the electromagnetic emissions that we have been creating (tv, radio, etc.) have only been powerful enough to travel sufficient distances to be seen by other life forms in the galaxy for the last 60 years or so. This means that any evidence of our existence has at the most only had a chance to travel about 60 light years, and so there are only about 64 stars that are close enough to us to have seen so far, many of which are not part of a star system. There may be billions of star systems in the galaxy, but any evidence of life takes a very very long time to travel and so maybe we just haven't had time to see it yet.