The Great Filter theory suggests humans have already conquered the threat of extinction
By George Dvorsky | io9.com
It’s difficult to not be pessimistic when considering humanity’s future prospects. Many people would agree that it’s more likely than not that we’ll eventually do ourselves in. And in fact, some astrobiologists theorize that all advanced civilizations hit the same insurmountable developmental wall we have. They call it the Great Filter. It’s a notion that’s often invoked to explain why we’ve never been visited by extraterrestrials.
But there is another possible reason for the celestial silence. Yes, the Great Filter exists, but we’ve already passed it. Here’s what this would mean.
Before we can get to the Great Filter hypothesis we have to appreciate what the Fermi Paradox is telling us.
The Fermi Paradox and the Great Silence
The so-called "Great Silence" is the contradictory and counter-intuitive observation that we have yet to see any evidence for the existence of aliens. The size and age of the Universe suggests that many technologically advanced extraterrestrial intelligences (ETIs) ought to exist — but this hypothesis seems inconsistent with the lack of observational evidence to support it.
Despite much of what popular culture and sci-fi would lead us to believe, the fact that we haven’t been visited by ETIs is disturbing. Our galaxy is so ancient that it could have been colonized hundreds, if not thousands, of times over by now. Even the most conservative estimates show that we should have already made contact either directly or indirectly (such as from dormant Bracewell communication probes).
Some skeptics dismiss the Fermi Paradox by suggesting that ETI’s have come and gone, or that they wouldn’t find us interesting.
Unfortunately, most solutions to the FP don’t hold for a number of reasons, including the realization that a colonization wave of superintelligent aliens would likely rework the fabric of all life in the cosmos (e.g. uplifting), or that these solutions are sociological in nature (i.e. they lack scientific rigor and don’t necessarily apply to the actions of all advanced civilizations; all it would take is just one to think and behave differently — what astrobiologists refer to as the non-exclusivity problem).
There have been many attempts to resolve the Fermi Paradox, including the herculean attempt by Stephen Webb in his book, Fifty Solutions to Fermi’s Paradox and the Problem of Extraterrestrial Life.
But one solution stands out from the others, mostly on account of its brute elegance: The Great Filter.
The Great Filter
Conceived in 1998 by Robin Hanson, the GF is the disturbing suggestion that there is some kind of absurdly difficult step in the evolution of life — one that precludes it from becoming interstellar.
And like the immutable laws of the universe, the GF is a stumbling block that holds true across the board; if it applies here on Earth, it applies everywhere.
Many look upon the GF as evidence that we’ll destroy ourselves in the future. The basic idea is that every civilization destroys itself before developing space-faring technologies. Hence the empty cosmos. Given our own trajectory and the ominous presence of apocalyptic weapons, this scenario certainly seems plausible. We’re not even close to going interstellar, yet we’re certainly capable of self-annihilation.
But that doesn’t mean this interpretation of the GF is the correct one. Rather, it’s quite possible that human civilization has already passed the Great Filter. Should this be the case, it would be exceptionally good news. Assuming there’s no other filter awaiting us in the future, it means we might be the first and only intelligent civilization in the Milky Way.
It’s a possibility, however, that demands explanation. If the filter is behind us, what was it? And how did we manage to get past it? Interestingly, there are some excellent candidates.
First and foremost there’s the Rare Earth Hypothesis (REH), the suggestion that the emergence of life was extremely improbable for a confluence of reasons. The theory essentially suggests that we hit the jackpot here on Earth.
This argument, which was first articulated by geologist Peter Ward and astrobiologist Donald E. Brownlee, turns the whole Copernican Principle on its head. Instead of saying that we’re nothing special or unique, the REH implies the exact opposite — that we are freakishly special and unique. What we see here on Earth in this solar system and in this part of the Galaxy may be a remarkable convergence of highly unlikely factors — factors that have resulted in a perfect storm of conditions suitable for the emergence of complex life.
It’s important to note that Ward and Brownlee are not implying that it’s one or two conditions that can explain habitability, but rather an entire array of happy accidents. For example, stars might have to be of the right kind (including adequate metallicity and safe distance from dangerous celestial objects), and planets must be in a stable orbit with a large moon. Other factors include the presence of gas giants, plate tectonics, and many others.
Read the full article at: io9.com
If the Universe Is Teeming with Aliens... Where Is Everybody?
The Fermi Solution
NASA’s Fermi Telescope Finds Giant Structure in our Galaxy
A Million Questions About Habitable Planet Gliese 581g
Oceans on Venus Might Have Been Habitable
Astronomers search for habitable moons
The Odds of Contacting ET Are Nil, Despite That They Are Already Watching
White House: No contact with aliens, but we’re looking
SETI Scientist: We’ll Find E.T By 2036
The Archons—Alien Intrusion
Alien Planet - Documentary
Professor: We have a ’moral obligation’ to seed universe with life - Panspermia
Leading Anthropologist Says Human Beings "Extinction Proof"
Latest News from our Front Page
Kanye West says in his VMA 2015 speech that he's running for president in 2020
'And yes, as you probably could have guessed by this moment, I have decided in 2020 to run for president.'
Kanye West received the Michael Jackson Video Vanguard Award at tonight's MTV Video Music Awards, and he closed his acceptance speech by announcing he's running for president in 2020. Yes, really!
The segment started with a bang when West was handed his ...
White students in Australia rejecting "multicultural" agenda, this is a problem apparently
According to Dr Christina Ho from Sydney’s University of Technology, White Students have not obeyed the command to become “multicultural”.
White Students have very rarely mixed with non-White groups, and Dr Ho thinks that this is a problem which must be solved.
“Schools are becoming more segregated in terms of both class and ethnicity,” she told the Sydney Morning Herald. “More and more ...
Sweden: The De-balling of the Vikings
For some reason, the deliberately-injected moral and mental cancer known as 'liberalism', aka 'progressivism' has always seemed to metastasize faster in the Nordic countries, particularly Scandinavian ones. This phenomenon is also observable among the American descendants of Scandinavian immigrants in places like Minnesota and Wisconsin.
The hypothesis of this reporter is that the innate, perhaps even genetic, altruism and human ...
New Monsanto Spray Kills Bugs by Messing With Their Genes
In a fascinating long piece in MIT Technology Review, Antonio Regalado examines the genetically modified seed industry's latest blockbuster app in development—one that has nothing to do with seeds. Instead, it involves the industry's other bread-and-butter product: pesticide sprays. But we're not talking about the poisonous chemicals you convinced your dad to stop dousing the lawn with. The novel sprays ...
Obama to speak with Jewish groups on Iran deal
President Barack Obama is using a Friday webcast to try to allay concerns from Jewish communities about the nuclear agreement with Iran.
Obama will deliver remarks about the agreement and take questions from participants. The webcast is being organized by two major Jewish organizations that have held similar events with Israeli Prime Minister Benjamin Netanyahu and Energy Secretary Ernest Moniz.
The Israeli ...
|More News » |