The question that many scientists have been searching for an answer for years.
not according to NASA . Not that much, 100-200 years, we can meet aliens. link
yaw let's say there are aliens. We did not find the plane that fell last year in our world (see: mh370 ). We will talk to aliens far away trillion light years.

The question that will be answered "we are not", taking into account what we cannot see.

We are alone in the world, my brother, isn't it enough