Saturday, 20 October 2018

"Where is everybody?"

This post is another that stems from a coincidence. I have been quietly reading my way through the excellent trilogy Remembrance of Earth's Past by Liu Cixin and had reached the final volume The Dark Forest when I also chanced to read an article in the Economist entitled Where is everybody?.

Both of these publications deal with the existence of extraterrestrial civilizations. The search for extraterrestrial intelligence (SETI) has been underway in one form or another for a long time and has, as yet, been unsuccessful. Along side SETI we also have METI (Messaging to Extra-Terrestrial Intelligence). While there has been some disquiet about our unintended broadcasting by virtue of electronic communications intended for others humans leaking out into the wider universe we have not stopped broadcasting to the far flung, unintended potential audience. At a meeting of the American Association for the Advancement of Science in 2015, Active SETI (METI) was discussed and questioned whether transmitting a message to potentially intelligent extraterrestrials elsewhere in the Cosmos was a wise.

The Economist article summarises the Fermi Paradox and then briefly discusses an assessment of our progress with SETI in the search by a trio of astronomers at Pennsylvania State University. In a few words, our progress amounts to... not much.

The fictional trilogy on the other hand is more focused on METI and how a lone researcher send a powerful message out into the Cosmos and gets a response, I will not spoil your pleasure should you care to read it for yourself. There are extraterrestrial intelligences out there but they may be quiet for a reason.

Also in 2015 a statement was released, signed by many in the SETI community, advocating that a "worldwide scientific, political and humanitarian discussion must occur before any message is sent". I would agree with this position but honestly do not know whether I would be in favour of any such message or not.