Occams Taser

Just what is the Fermi Paradox?  Well, in a nutshell, it asks, if ET really existed, then why do we not see intelligent civilizations everywhere?  In the late 1950s, the noble prize winning physicist Enrico Fermi asked the question, if there are intelligent civilizations elsewhere in the galaxy, then why don't we see them everywhere by now, as they would have colonized the entire galaxy long ago?  Fermi's reasoning seems…