Space Radio: More Static, Less Talk

[Istik]

http://www.damninteresting.com/?p=219

At least two hundred billion of these stars reside within our own 13-billion-year-old galaxy, along with millions or billions of planets and moons. Considering the abundance of potential habitats and the amount time our galaxy has been around, it seems inconceivable that our ordinary planet is the only one which has produced intelligent, signal-radiating life. Even if a solar system's odds of developing intelligent life is only one-in-a-billion, that means that the Milky Way should be home to two hundred or so past or present civilizations, in addition to some seventy billion amongst the other galaxies