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Topic: Fermi paradox

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  Fermi Paradox - Crystalinks
The Fermi Paradox is a physical paradox in which high estimates of the probability of the existence of extraterrestrial life are contrasted with a lack of evidence.
The Fermi paradox is a conflict between an argument of scale and probability, and a lack of evidence.
The second cornerstone of the Fermi paradox is a rejoinder to the argument by scale: given intelligent life's ability to overcome scarcity, and its tendency to colonize new habitats, we have assumed that any advanced civilization would seek out new resources and colonize first their solar system, and then surrounding solar systems.
www.crystalinks.com /fermiparadox.html   (1282 words)

 Wikinfo | Fermi paradox   (Site not responding. Last check: 2007-11-02)
Proposed by physicist Enrico Fermi, the Fermi Paradox attempts to answer one of the most profound questions of all time: "Are we the only technologically advanced civilization in the Universe?".
However those people who adhere to the premise of the Fermi Paradox believe that, due to a lack of evidence to the contrary, in all probability, humans (as a technologically advanced species) are effectively alone in at least our part of the Milky Way Galaxy.
Some adherents to the Fermi Principle state that it is highly unlikely that all advanced civilizations would not eventually take full advantage of the power source of their home star, and in doing so changing the electromagnetic signature of their sun.
www.wikinfo.org /wiki.php?title=Fermi_paradox   (2788 words)

 Fermi's Paradox   (Site not responding. Last check: 2007-11-02)
Fermi realized that any civilization with a modest amount of rocket technology and an immodest amount of imperial incentive could rapidly colonize the entire Galaxy.
So what Fermi immediately realized was that the aliens have had more than enough time to pepper the Galaxy with their presence.
Until and unless better evidence is collected, few scientists are inclined to accept the premise that the Fermi Paradox can be resolved by the claim that aliens are either soaring through the stratosphere, or are stashed away in meat lockers at Area 51.
www.global-conspiracies.com /fermis_paradox.htm   (2015 words)

 Fermi Paradox
Physicist Enrico Fermi asked: "If there are extraterrestrials, where are they?" The fact that no convincing evidence had been found of extraterrestrial activity in or near the solar system suggested to him that there were no intelligent extraterrestrial societies in the Galaxy.
Thus the Fermi Paradox cannot logically be raised as an objection to the existence of ETI until these major observational deficiencies have been corrected.
This "paradox" is a formally invalid inference, both because it requires modal operators lying outside the first-order propositional calculus and because it is unsupported by the observational record.
www.daviddarling.info /encyclopedia/F/FermiPar.html   (941 words)

 Fermi's Alien Question
Fermi's Famous question, now central to debates about the prevalence of extraterrestrial civilizations, arose during a luncheon conversation with Emil Konopinski, Edward Teller, and Herbert York in the summer of 1950.
More amusing was Fermi's comment, that it was a very reasonable theory since it accounted for two separate phenomena: the reports of flying saucers as well as the disappearance of the trash cans.
York believes that Fermi was somewhat more expansive and "followed up with a series of calculations on the probability of earthlike planets, the probability of life given an earth, the probability of humans given life, the likely rise and duration of high technology, and so on.
www.bayarea.net /~kins/AboutMe/Fermi_and_Teller/fermi_question.html   (1299 words)

 ufo - UFOS at close sight: Resolving the Fermi Paradox, by Robert A. Freitas Jr
Fermi's question "Where are they?" implicitly construes the absence of extraterrestrials on Earth as positive evidence of their nonexistence elsewhere in the Universe.
Past and recent [5-8] discussions of the Fermi Paradox make one critical assumption challenged in the present work: That the absence of extraterrestrials or their artifacts on Earth or in the Solar System is an undisputed fact, and, more generally, that advanced technology invariably leads to observable alteration of the large-scale physical environment.
The Fermi Paradox cannot logically be raised as an objection to the existence of ETI until these major observational deficiencies have been corrected.
ufologie.net /htm/freitas01.htm   (4073 words)

 Fermi Paradox   (Site not responding. Last check: 2007-11-02)
Fermi's supposition (as York remembers, with a bit of uncertainty) is that interstellar travel is either impossible, or at least so difficult that nobody undertakes it because it is not worth the effort.
Fermi and the group came away with the feeling that this was a strong question, one that had not been answered at that lunch.
Morrison also pointed out that Fermi began to complain about his memory after the war, and started keeping a notebook; it is possible that his ideas on the Paradox are recorded in them.
frank.harvard.edu /~paulh/unpublished/fermi.htm   (574 words)

 Fermi's Paradox   (Site not responding. Last check: 2007-11-02)
Fermi's paradox relies on the assumption that civilizations (as we know them) have a desire to colonize (or at least explore) the Galaxy.
Team 1 resolves Fermi's paradox by arguing that we don't see evidence for aliens because other technological civilizations have no desire to colonize or explore the Galaxy (do we have such a desire?) or that the physical limitations behind space travel have made colonization impossible.
They resolve Fermi's paradox with plausible speculations such as we have been colonized but we just don't know it; for example, the alien civilization is into nanotechnology so small that we haven't detected it yet or we have been quarantined in a galactic zoo.
www.phys.unsw.edu.au /astro/seti/dt/fermi.html   (290 words)

 UFOS at close sight: Fermi's paradox   (Site not responding. Last check: 2007-11-02)
Fermi's paradox as used by the skeptics relies on the idea that there should be abundant observation of extraterrestrial also on the ground.
Fermi's paradox attributes intentions to alien lifeforms: it is assumed that if there is intelligent life in the galaxy, it must abound because the galaxy is old enough and they had time to develop the technology for visiting us, and so they must be visiting us.
The idea, central in Fermi's Paradox, that we should either see little green men shaking hands all over the Earth, or consider that there is no intelligent life in the universe elsewhere than on the Earth is a very simplistic reasoning that does not fit with the complexity of the issues involved.
ufologie.net /htm/fermi.htm   (2155 words)

 There Is No Fermi Paradox
The "Fermi Paradox," an argument that extraterrestrial intelligence cannot exist because it has not yet been observed, is a logical fallacy.
Known as the "Where Are They?" question or the "Fermi Paradox," this sophism posits that in time an intelligent extraterrestrial species must achieve high technology, exploring and colonizing first its planetary system, and later the Galaxy, as humanity has explored and colonized the Earth.
It is surprising that the formal invalidity of the paradox, which cannot be cast in acceptable syllogistic form, has gone unmentioned in previous discussions.
www.rfreitas.com /Astro/ThereIsNoFermiParadox1985.htm   (1083 words)

 The Fermi Paradox: An Approach Based on Percolation Theory
Many proposals for solutions to the Fermi paradox exist, all of which are unsatisfactory in one way or another [3].
Proposed solutions to the Fermi paradox either deny the possibility of extraterrestrial civilizations [1, 5], an assumption as yet unwarranted, or accept the possibility of extraterrestrial technological civilizations and propose explanations for why such civilizations may nevertheless not have colonized the galaxy.
Like all discussions of the Fermi paradox, solutions based on a percolation approach are dependent on the validity of its assumptions.
www.sff.net /people/Geoffrey.Landis/percolation.htp   (2469 words)

 UFO Evidence : Fermi's Paradox
In a universe with billions of galaxies, galaxies having a hundred billion stars, it is implausible that this planet is the only abode of intelligent life, that there aren't quite a few planets around with intelligent life forms on them.
I propose a model for [for the problem of the Fermi Paradox] based on the assumption that long-term colonization of the galaxy proceeds via a "percolation" process similar to the percolation problem which is well studied in condensed-matter physics.
But one of the four, the renowned physicist and back-of-the-envelope calculator Enrico Fermi, asked the telling questions: If the extraterrestrial life proposition is true, he wondered, "Where is everybody?"" "In this book, Stephen Webb presents a detailed discussion of the 50 most cogent and intriguing answers to Fermi's famous question.
www.ufoevidence.org /topics/Fermi.htm   (1109 words)

 Fermi Paradox - Unexplained Mysteries Discussion Forums
A graphical representation of the Arecibo message, Humanity's first attempt to communicate its existence to alien civilizationsThe Fermi Paradox is a physical paradox in which estimates of the high probability of the existence of extraterrestrial life are contrasted with a lack of evidence.
There have been attempts to resolve the Fermi Paradox by locating evidence of technologically advanced civilizations, or to respond to it by explaining how extraterrestrial civilizations could exist and yet remain undetected by us.
The belief that the lack of evidence is a conclusive argument for the non-existence of extraterrestrial civilizations is referred to as the Fermi principle.
www.unexplained-mysteries.com /forum/index.php?showtopic=67820   (8188 words)

 Modern Science: Fermi's Paradox
This is the crux of what's dubbed "Fermi's Paradox." There's an amusing response that intelligent species become addicted to computer games before they can propagate too much, and that only Luddite species can eventually colonize the galaxy.
While amusing, the version of the paradox that interests me more is that involving time travel.
This solves the chronological paradox issue, but not Fermi's, and therefore is incomplete.
modern-science.blogspot.com /2006/05/fermis-paradox.html   (510 words)

 Answering Fermi's Paradox
Fermi's paradox refers to his cynicism that if the spontaneous creation of life is commonplace in our galaxy, including the creation of technologically advanced intelligent species, their existence should be obvious to us.
The answer then to Fermi's paradox is that we human beings, being mere biologicals, are utterly unworthy of the artilects' attention, even though the galaxy may be full of artilects.
The solution to Fermi's paradox is that intelligent life does not survive very long in the universe.
www.kurzweilai.net /articles/art0188.html?m=4   (8796 words)

 The Roving Mind:Little Green Men or Not?
Fermi asked his companions if they had any idea why Earth had not been visited, or at least contacted, by aliens from space.
Now, in the most intriguing book ever to deal with Fermi's Paradox, Dr Stephen Webb, a British physicist and writer, has come up with 50 possible solutions to a quandary that has bemused scientists for more than half a century.
His solution to the Fermi Paradox is blissfully simple to comprehend.
www.fortunecity.com /emachines/e11/86/rmind9.html   (2528 words)

 The Great Silence, Fermi’s Paradox, and The Singularity
In a nutshell, finding life on Mars would intensify the Fermi Paradox in that with two successes out of two possibilities, it would seem that the universe should be teeming with life, and the aliens should have already been here.
Therefore, the answer to Fermi’s Paradox has little bearing in our day-to-day lobbying and other grass-roots pro-space efforts (unless we run into SETI enthusiasts) and in fact, won’t be relevant until we finish settling our Solar System.
After that point, the resolution to Fermi’s Paradox will be critical to our survival as a species.
www.islandone.org /MMSG/ttf/fermlife.htm   (2572 words)

 The Possibilities of FTL: Or Fermi's Paradox Reconsidered
One of the more interesting aspects of our apparent aloneness was pointed out by Enrico Fermi and is know as Fermi's Paradox (1).
Fermi's Paradox may be succinctly stated as: Extraterrestrials should have colonized Earth long ago, but they have not.
While the value of 50 million years is a long time in comparison to a human life span, it is short in comparison to the life span of main sequence stars.
www-personal.engin.umich.edu /~fritx/Ftlessay/essay.html   (3880 words)

 Whatever: The Fermi Paradox
Fermi's "paradox" has many conceivable solutions in my mind, which is why I have never really considered it.
The Fermi paradox assumes that growth is an unlimited, unconsciouis process, and that it will always happen no matter what.
A strength of the Fermi Paradox, and this applies to economics solutions, or demographic transition solutions (Abidemi), is that even if these solutions apply to all but a tiny fraction of civilisations, that tiny fraction should have filled the galaxy.
www.scalzi.com /whatever/004251.html   (5331 words)

 Fermi's Paradox and the Preparation for Contact Hypothesis - UFO Evidence
The bottom line is that if even only a few alien civilizations have arisen in the 10 billion or so year history of our Galaxy, most of the habitable parts of the Galaxy would likely be colonized by now.
The famous physicist, Enrico Fermi, was referring to such an argument when he asked: "Where are they?" Since he was a prominent (and very smart) scientist, his simple question has been given a duly profound name: Fermi's paradox.
Their being here -- but surreptitiously -- would answer Fermi and at the same time address a second common objection to the UFO phenomenon by scientists: that the observations indicate such utterly nonsensical, bizarre behaviour that it just could not possibly be real.
www.ufoevidence.org /documents/doc80.htm   (1206 words)

 Fermi Paradox; published thoughts.
Even after one talk.origins participant eventually pointed out that the position I was arguing was known as the Fermi Paradox and submitted a few small references in seemingly obscure scientific journals, I still had a notion that this "Fermi Paradox" was little-known.
He argued, as in the Fermi Paradox, that as soon as an intelligent civilization starts colonizing other stars, it can colonize its entire galaxy within a few tens of millions of years, which is a blink of an eye on the cosmic time scale.
He lays out the paradox as follows (p162): "The human race might be able to establish a significant presence in the galaxy within a time span as short as a few million years, an incredibly short time on a cosmic scale...
geocities.com /CapitolHill/Lobby/7049/fermi.htm   (4600 words)

 Amazon.com: If the Universe Is Teeming with Aliens... Where Is Everybody? Fifty Solutions to Fermi's Paradox and the ...   (Site not responding. Last check: 2007-11-02)
In response to Enrico Fermi's famous 1950 question concerning the existence of advanced civilizations elsewhere, physicist Webb critically examines 50 resolutions to explain the total absence of empirical evidence for probes, starships, and communications from extraterrestrials.
That was Fermi's solution of course, and it is a popular one; however I don't think that Webb comes anywhere near to making a convincing case; and at any rate he is somewhat equivocal about whether his answer applies to the entire universe or to just the galaxy.
Fermi's Paradox can be stated in this way: If we humans are nothing special in the Universe, it must be teeming with intelligent life.
www.amazon.com /Universe-Aliens-Everybody-Solutions-Extraterrestrial/dp/0387955011   (3499 words)

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