I usually only blog about issues on which I have some expertise, or at least sufficient knowledge to make points that have not been put forward by other commentators. But I am making an exception for the Fermi Paradox – the question of why we have not so far detected any intelligent extraterrestrial life. Astronomers and a few social scientists have been debating this issue for years. UFO enthusiasts, of course, believe the question has already been answered. But I think it deserves more attention than it has gotten so far from serious scholars in a variety of disciplines.
Maybe, But it’s never going to get much beyond fruitless discussion until we either are finally contacted by aliens, or we get out there and start checking things for ourselves.
I think we’re more likely to find ruins of dead civilizations (and dead races) long before we find civilization itself.