In order to reach us in anything less than centuries though, they would have to defy the laws of physics as we know them.
So if the laws of physics are laws, we may never meet other life forms, even if they do exist. Even contacting them with radio signals would take decades, of not centuries or millenia, since electromagnetic waves travel at the speed of light only.
Edited by revolink24 - 4/11/11 at 9:18pm