300,000,000,000 civilizations in the Universe


If we assume as some have suggested, and extremely conservatively, that there are only about 3 intelligent civilizations per galaxy (my view is that this number will soon be shown to be absurdly low) and also assume fairly conservatively that there are 100 billion galaxies in the universe, this leads us to a rather spectacular number of some three hundred billion civilizations in the universe.    Unfortunately we’ve only found one of them.

299,999,999,999 intelligent civilizations to go.