Travelers In The Night

Recently Dr. Adam Frank of the University of Rochester and Dr Woodruff Sullivan of the University of Washington published a paper in which they addressed the question "What are the odds that humans are the only technological species that has ever arisen in a given volume of space"? Humans continue to look into the night sky and wonder what is out there. The immense distances and the uncertain lifetime of an advanced civilization make it seem unlikely that we will discover intelligent beings outside of Earth. However, I remain hopeful of one day waking to the news that we have received signals from thinking beings which live elsewhere in the Milky Way.