The Fermi Paradox

Leave a comment

Are We Alone In The Universe?

So far, we have no evidence to the contrary, and yet the odds that not one single other planet has evolved intelligent life would appear, from a statistical standpoint, to be quite small. There are an estimated 250 billion (2.5 x 10?? ) stars in the Milky Way alone, and over 70 sextillion (7 x 10?? ) in the visible universe, and many of them are surrounded by multiple planets. The shear size of the known universe is staggeringly and inconceivably vast. The odds of there being only one single planet that evolved life among all that unfathomable vastness seems so incredible, that it is all but completely irrational to believe. But then “where are they?” asked physicist Enrico Fermi while having lunch with his colleagues in 1950.
Fermi questioned, if there are other advanced extraterrestrial civilizations, then why is there no evidence of such, like spacecraft or probes floating around the Milky Way. His question became famously known as the Fermi Paradox. The paradox is the contradiction between the high estimates of the probability of the existence of extraterrestrial civilizations and yet the lack of evidence for, or contact with, any such civilizations. Given the extreme age of the universe, and its vast number of stars, if planets like Earth are at all typical, then there should be many advanced extraterrestrial civilizations out there, and at least a few in our own Milky Way. Another closely related question is the Great Silence, which poses the question: Even if space travel is too difficult, if life is out there, why don’t we at least detect some sign of civilization like radio transmissions?
Milan Cirkovic of the Astronomical Observatory in Belgrade, points out that the median age of terrestrial planets in the Milky Way is about 1.8 gigayears (one billion years) greater than the age of the Earth and the Solar System, which means that the median age of technological civilizations should be greater than the age of human civilization by the same amount. The vastness of this interval indicates that one or more processes must suppress observability of extraterrestrial communities.
Since at this point, there is no direct and/or widely apparent evidence that extraterrestrial life exists, it likely means one of the following:
We are (A) the first intelligent beings ever to become capable of making our presence known, and leaving our planet. At this point, there are no other life forms out there as advanced as us. Or perhaps extraterrestrial life does exists, but for some reason extraterrestrial life is so very rare and so very far away we’ll never make contact anyway—making extraterrestrial life nonexistent in a practical sense at least.
Or is it (B) that many advanced civilizations have existed before us, but without exception, they have for some unknown reason, existed and/or expanded in such a way that they are completely undetectable by our instruments.
Or is it (C) There have been others, but they have all run into some sort of “cosmic roadblock” that eventually destroys them, or at least prevents their expansion beyond a small area.
The ancients once believed that Earth was the center of the universe. We now know that Earth isn’t even at the center of the Solar System. The Solar System is not at the center of our galaxy, and our galaxy is not in any special position in contrast to the rest of the known universe. From a scientific viewpoint, there is no apparent reason to believe that Earth enjoys some privileged status. Since Earth’s placement in space and time appears to be unremarkably random, proposition “A” seems fairly unlikely. Assuming humans evolved like other forms of life into our present state due to natural selection, then there’s really nothing all that mystical, special or remarkable about our development as a species either. Due to the shear numbers, there are almost certainly other planets capable of supporting at least some form of life. If that is so, then for Earthlings to be the very first species ever to make a noticeable mark on the universe, from a statistical perspective, is incredibly unlikely.
For proposition “B” to be correct would defy all logic. If potentially thousands, or even millions of advanced extraterrestrial civilizations exist in the known universe, then why would all of them, without exception, choose to expand or exist in such a way that they are completely undetectable? It’s conceivable that some might, or perhaps even the majority, but for all of them to be completely undetectable civilizations does not seem likely either.
Proposition C in some ways, appears to be more likely than A or B. If “survival of the fittest” follows similar pathways on other worlds, then our own “civilized” nature could be somewhat typical of extraterrestrial civilizations that have, or do, exist. Somehow, we all get to the point where we end up killing ourselves in a natural course of technological development and thereby self-inflict our own “cosmic roadblock”. “Perhaps the most disturbing aspect of the Fermi Paradox is what it suggests for the future of our human civilization. Namely, that we have no future beyond earthly confinement and, quite possibly, extinction. Could advanced nanotechnology play a role in preventing that extinction? Or, more darkly, is it destined to be instrumental in carrying out humanity’s unavoidable death sentence?” wonders Mike Treder, executive director of the Center for Responsible Nanotechnology (CRN).
Treder believes that some of the little understood new technologies now being developed such as nanotech, and others, could well be either our salvation or just as likely end up causing our ultimate destruction. “Whatever civilizations have come before us have been unable to surpass the cosmic roadblock. They are either destroyed or limited in such a way that absolutely precludes their expansion into the visible universe. If that is indeed the case—and it would seem to be the most logical explanation for Fermi’s Paradox—then there is some immutable law that we too must expect to encounter at some point. We are, effectively, sentenced to death or, at best, life in the prison of a near-space bubble,” suggests Treder. “Atomically-precise exponential manufacturing could enable such concentrations of unprecedented power as to result in either terminal warfare or permanent enslavement of the human race. Of course, that sounds terribly apocalyptic, but it is worth considering that the warnings we heard at the start of the nuclear arms race, and the very real risks we faced in the height of the Cold War, were but precursors to a much greater threat posed by an arms race involving nano-built weaponry and its accompanying tools of surveillance and control.”
When we consider the chronological history of life on Earth, humans have only existed for a small fragment of time and our existence has always been precarious. The entire time we’ve existed, we been banding into various groups and attempting to kill each other—or at least are constantly in the process of developing more effective ways of killing each other—just in case. The US government, for example, spends on “Defense” (including “preemptive” warfare) and Homeland Security, 8 times what it spends on educating the next generation. There is enough nuclear weaponry in storage around the world to kill every living creature on the planet several times over. Clearly, we’re a species with poor odds of surviving indefinitely.
Our self-destructive natures aside, curiosity may end up killing more than the cats. The faster technology is advancing, the more our “leap now, look later” nature appears to grow as well. If evolution on Earth serves as a somewhat typical template for evolution of other life forms, then becoming a truly advanced civilization must be a very daunting task indeed and a very rare, if not impossible, achievement. In fact, Sir Martin Rees, Great Britain’s Astronomer Royal and respected professor of astrophysics at Cambridge University has estimated that humans have only a 50-50 shot of making it through the 21st century. If Rees is right, and our standing on the planet is as precarious as he and others believe it is, then we may be alone due to a built-in evolutionary self-destruct button. Others have come before and others will exist after, but the cosmic roadblock may be an innate, finite nature, which only allows sentient life forms to exist for a very small window of time—windows of life which may be too small for our civilization to match up with the small windows of other civilizations that have been before or will come after.
In a contrary point of view, Milan Cirkovic believes that highly efficient city-state type of advanced technological civilizations could easily pass unnoticed even by much more advanced SETI equipment, especially if located near the Milky Way rim or other remote locations.”

– http://www.dailygalaxy.com/

‘Twisted light’ beamed across Vienna

Leave a comment

The green laser beam travelled from a radio tower to the roof of the scientists’ own building

Physicists have sent a beam of twisted light 3km through the air above Vienna.

It is the first time that information has been transmitted outdoors using the “twist” of a visible light beam.

This twisting property could allow very fast communication because light with different amounts of twist, encoding separate channels of information, could be sent simultaneously.

Reported in the New Journal of Physics, the technique was tested by sending three images of famous Austrians.

The images were black-and-white portraits of the physicists Ludwig Boltzmann and Erwin Schroedinger, and composer Wolfgang Amadeus Mozart.

Above the rooftops of Mozart’s own city, where the only long-range signal known to the famous composer would have been church bells, his portrait was broken down into pixels and travelled through the night inside a green laser beam.

Source: BBCNews Read more

The Kill Shot

1 Comment

Godzilla’ Sunspot Takes Aim: X-Class Flare Thought To Be 

Responsible For Widespread Power Outages and Internet Problems

by Mac Slavo

“A massive sunspot dubbed ‘Active Region 2192′ has rotated into an earth-facing position. NASA says the Jupiter-sized magnetic anomaly on the sun is crackling with energy and several days ago it fired off an X-class flare right in earth’s direction. Then, yesterday, it launched another flare that was measured to be five times more powerful than the first. Though the classification of both flares was fairly low and rated in the 1.0 to 2.0 X-class range, the earth’s power and internet infrastructure has experienced some unusual effects over the last 48 hours.

As of this morning, numerous power outages have been reported by internet providers, electrical utility companies, cable companies and even large inter-networks like MSN.com and Amazon. The outages are being reported by users on Twitter all over the northern hemisphere, including from Canada all the way down to Boston. Many of the companies involved have suggested that the outages were planned or the result of wind storms, but what is curious is that at the very same time all of these outages were being reported on earth, the National Weather Service’s National Center for Environmental Prediction (NCEP) announced that their space-based satellite systems stopped reporting data.

Coincidence? Perhaps. But an alternate theory is that the solar flares emitted by AR 2192 have something to do with it. How else can we explain widespread outages for literally hundreds of thousands of people occurring almost simultaneously at key utility and internet nodes across thousands of miles on earth, and happening in tandem with a breakdown in communications from the NCEP’s weather monitoring satellite?


Sunspot AR2192 causes Internet & Power Outages Worldwide

An X-class solar flare designated in the 1.0 to 2.0 range doesn’t usually take down power grids and communications infrastructure, though they have been known to temporarily knock out satellites and cause problems with Global Positioning Systems and radio communications. The outages being reported by users are more than likely temporary without any permanent damage to the physical equipment involved in carrying the signals from point-to-point.

However, historical examples of large-scale outages resulting from solar flares have been well documented. In 1859 a massive solar flare known as the “Carrington Event” left newly developed Telegraph systems inoperable and reportedly even led them to explode and set stations on fire. In 1989 a geo-magnetic storm caused the collapse of Quebec’s hydro electric power station. The flare that took only 90 seconds to bring the electric company to its knees was a fairly powerful x15-Class discharge.

Given these examples, it’s not out of the question to suggest that a solar flare directly targeting Earth could potentially take out many modern day systems hooked into the grid. In fact, 18 months ago the sun emitted what researchers called a “Carrington Class” solar flare. It just slightly missed earth, but had the sunspot been earth facing at the time it could have been the Kill Shot that took the majority of the planet back to the stone age.

‘The world escaped an EMP catastrophe,’ Henry Cooper, who now heads High Frontier, a group pushing for missile defense, told Washington Secrets. ‘There had been a near miss about two weeks ago, a Carrington-class coronal mass ejection crossed the orbit of the Earth and basically just missed us,’ added Peter Vincent Pry, who served on the Congressional EMP Threat Commission.

Major Ed Dames, who has long proposed that a massive solar event known as the Kill Shot will eventually hit earth, says that when it happens, expect widespread global outages. Unlike what we experience with lower classification X-flares, however a Kill Shot will be a long-term event: “Yeah, if any particular grid goes, they’re not all going to go down at once and some will never go down. The ones that are stretched out over long wide spaces, they will. They will under the right circumstances and the right circumstances are happening real soon, watch the solar flares from (sunspot) 2192 as a harbinger of what’s coming real fast. When the grids go down, we’re looking at easily no less than 6 months, but probably 2 years. A lot can happen in terms of Mad Max scenarios.”

Source: Running ‘Cause I Can’t Fly Read more

Who’s afraid of bromine?

Leave a comment

Bromine looks sinister – like something you might find on Dr Frankenstein’s workbench. But are people sometimes too hard on compounds made from element 35 of the periodic table?

As you read this article, you are probably surrounded by bromine – in the chair or sofa you are sitting on. In the carpet on your floor, the curtains at your window, perhaps even the walls of your house. And in the computer whose screen you are staring at.

All these things are likely to contain unnatural substances such as polybrominated diphenyl ether or hexabromocyclododecane. Bromine-based chemicals have also found their way into food and drinking water – indeed until recently they were added to drinks like Fanta and Gatorade.

Some of these chemicals have been shown to be dangerous to human health, and have been banned or withdrawn. Yet the bromine industry claims it is the victim of “chemophobia” – an irrational public prejudice against chemicals borne out of ignorance and misinformation.

Bromine saves lives, they point out.

There is no denying that pure bromine is extremely unpleasant. It derives its name from the Greek for “stench”, and it is a particularly vicious material – just ask Andrea Sella of University College London.

“When I was at school nobody had warned me about how nasty this stuff was,” the chemistry professor ruefully recalls, as he pours some of the toxic red liquid into a beaker, where it sits under a smog-like haze of heavy brown vapour.

“I managed to spill a bit of bromine liquid on to the back of my hand, and it burned through the skin and left a long scab that took weeks to heal.”

Bromine is one of the halogens – the group of elements that occupy the penultimate column of the periodic table. And it is probably the least well known – chlorine we know from swimming pools, iodine from antiseptics, and fluorine from toothpaste.

Being a halogen, bromine atoms are one electron short of a complete outer shell, which makes them highly reactive, readily bonding with other atoms. That is why pure bromine is so dangerous to handle, and also why you never come across it in nature.

Instead, bromine is commonly found in highly un-reactive bromide salts – in much the same way that the poisonous green gas chlorine is commonly found in boring sodium chloride, table salt.

To illustrate the point, Andrea drops some aluminium foil into his beaker of bromine. It bursts into intense flames. When the fire burns out, all that is left is a residue of aluminium and bromide salts.

It was from naturally occurring salt waters that two chemists independently discovered bromine two centuries ago – the German Carl Jacob Lowig from mineral water in 1825, and the Frenchman Antoine Balard from salt marsh seaweeds in 1826. Both used chlorine gas to displace the bromine atoms from their salt solutions, producing the characteristic acrid fumes of the new element.

Today, bromine is extracted on an industrial scale from salt lakes that are especially rich in the element, above all the Dead Sea.

Source: BBCNews Read and see more

%d bloggers like this: