The latest from the quantum physics folks is that it may be dark matter and dark energy that prevents us from contacting alien life. Here's the brain-stretching part. These alien beings may be sending us signals from dimensions we cannot perceive that exist out there somewhere. Great! How do we figure out a way to perceive what we are not built to perceive? How do we "adjust" ourselves to accommodate to it so that these signals can get through to us? Any ideas?