background preloader

Fermi's Paradox

Facebook Twitter

The Great Filter. Sept. 15, 1998 by Robin Hanson Humanity seems to have a bright future, i.e., a non-trivial chance of expanding to fill the universe with lasting life.

The Great Filter

But the fact that space near us seems dead now tells us that any given piece of dead matter faces an astronomically low chance of begating such a future. There thus exists a great filter between death and expanding lasting life, and humanity faces the ominous question: how far along this filter are we? Combining standard stories of biologists, astronomers, physicists, and social scientists would lead us to expect a much smaller filter than we observe. Introduction Fermi, Dyson, Hart, Tipler, and others [Finney & Jones, Dyson 66, Hart 75, Tipler 80] have highlighted the relevance to SETI (the search for extraterrestrial intelligence) of the "The Great Silence" [Brin 83] (also known as the Fermi paradox), the fact that extraterrestrials haven't substantially colonized Earth yet.

Life Will Colonize.

Chances of Life Forming

Chances of Life Ending. Barriers to Space Expantion. Search. Security. What We'll Leave Behind. Invitation to ETI: An Open letter to Alien Lurkers. First, a message for you humans out there, who happen to be reading this right now.

Invitation to ETI: An Open letter to Alien Lurkers

As many of you know, I approach the topic of non-human intelligent life from two perspectives. As an author using fiction to explore notions beyond today's science, I explore the forms and motivations that alien beings might assume, from outlandish to eerily familiar. I am also involved in the same subject at the scientific end, participating in the International Astronomical Union's Subcommittee on Bioastronomy. SETI -- the Search For Extra-Terrestrial Intelligence -- can be a difficult and confusing topic, straddling the concerns of everyone from sober researchers to politicians to dreamers hoping that alien contact may somehow save humanity "from ourselves" The good news? Nearly all SETI researchers agree that the public should be told right away, after any radio contact is confirmed. A minority in the SETI community thinks it would make better sense not to reply right away.

Dr. 1. 2. Ask Dr. SETI: Isn't the Invitation to ETI Futile? Ask Dr.

Ask Dr. SETI: Isn't the Invitation to ETI Futile?

SETI ® Chapter 5: Sociology Isn't the Invitation to ETI Futile? Dear Dr. SETI: I recently visited the Invitation to ETI website (, and have a little difficulty understanding how extraterrestrial intelligence (even when it's really highly intelligent) could use this web page. Marten, Netherlands The Doctor Responds: You raise some valid points, of course. . (1) the type of entity which we consider most likely to encounter and interact with the IETI website is probably not biological, but rather an advanced interstellar AI probe. . (2) even if no such robotic probes exist, the contents of this website are a profound statement to the inhabitants of Planet Earth (many of whom can indeed interpret both human languages and our internet protocols).

As far as stumbling across the website is concerned: you managed to. Thanks for your comments. The Fermi Paradox — Where Are All The Aliens? Does a galaxy filled with habitable planets mean humanity is doomed? Meet SETI's new boss: Geoff Marcy, the planet hunter. Sustainability. Star Trek: First Contact. On the Fermi Paradox. The 7 Least Plausible Solutions To The Fermi Paradox. "it would mean that all alien civilizations would have to find space too big to bother with, or that interstellar space travel is technologically unfeasible.

The 7 Least Plausible Solutions To The Fermi Paradox

Neither is likely true. " Our best understanding right now is that it IS true. The fact that we have not seen signs of alien life could be taken as supporting indirect evidence that it is true, too. I've said this before and people hate it, but it makes it no less true: Space travel might be too big of a problem to solve.

There may never be a warp drive. And it is not just space that is big, but it is TIME that is big as well. People here hate this idea. Flagged For a civilization advanced enough, I don't think TIME is a issue.