Is It Time to Accept That We're Alone in the Universe?

We have yet to discover any signs of aliens, a troubling observation that has led to much speculation. One possible solution to the Great Silence is that nobody's out there. It's a conclusion that sounds impossible to believe, but there may be something to it. Here's why we may be alone in the universe. » 11/05/14 5:17pm 11/05/14 5:17pm