Ever wondered why we haven’t made contact with an advanced interstellar extraterrestrial civilization yet? Or better yet, why they have not not tried to contact us? Read all about the Fermi Paradox, which basically tries to theorize the following;

The apparent size and age of the universe suggests that many technologically advanced extraterrestrial civilizations ought to exist. However, this hypothesis seems inconsistent with the lack of observational evidence to support it.

If you want to hear all the current theories, then check this entry on Wikipedia – The Fermi Paradox. Theories include, Rare Earth hypothesis, Doomsday argument, technological singularity, Relativity of simultaneity, Project Longshot, my favorite is the Zoo hypothesis plus a lot more. Even if you aren’t into this sort of scientific information its fun to read.

Very interesting article on what Stephen Hawking thinks the reason aliens are not visiting us or if they even exist at all. And if they do, they may not be intelligent which is why they can’t contact us. On the other hand if there are intelligent beings out there, we may not want a visit… Read the article here (short and easy to understand).