I came across an interesting article in the Feb/Mar 2010 issue of the Australian Sky and Telescope magazine. It is titled "Where have all the aliens gone? by Jacob Haqq-Misra and Seth D Baum.
In 1950 Enrico Fermi "...made a back-of-the-envelope calculation to estimate the time required for a technological civilisation to spread throughout the galaxy."
"So if any technological extraterrestrial society exists, then they should have visited us by now."
Arguments put forward to explain why we are not being visited by ETs include:
* Life on Earth is a statistical anomaly
* Civilisations blow themselves up
* A Prime Directive may prevent them from revealing themselves.
The authors of this article question Fermi's assumptions and suggest that "If growth outstrips resources, human civilisation may collapse." Therefore, perhaps this explains the absence of ET visits to Earth.
" If it was anything other than national security, the DoD would not be involved. The Air Force wouldn't be involved; Navy wouldn...
Hi all, Every now and then a book comes along which challenges your personal viewpoint. This post is about such a book. The subject is sle...
Introduction Blog readers will be well aware of the fact that Las Vegas billionaire, Robert Thomas Bigelow , bought a ranch in Utah, in t...
A document comes to light A document has surfaced, dated 16 October 2002, which purports to be a copy of a set of notes, (not a transcr...