Wednesday, September 06, 2006

An alternative to string theory

One of the subjects we keep coming back to here at Nobel Intent is the unification of gravity and quantum mechanics. One of the main contenders for this has to be string theory, in which all observable properties can be simply described as vibrations on a string or more complex structure. The problem with string theory has been obtaining precise predictions. On the one hand, string theory provides predictions at very high energy, which experimentalists cannot test, while at lower energy, the calculation techniques and approximations make any predictions tenuous at best. Then there was the great disappointment, string theory doesn't naturally explain a nonzero vacuum energy, causing some theorists to fall back on the anthropic principle. However, alternatives such as braneworld do exist.

One such alternative was outlined in the print edition of Scientific American this month. The idea really goes back to Einstein and his work on relativity and gravity. Einstein modified our understanding of space, time and their relationship and Alain Connes thinks that maybe we still don't have that understanding quite right. The reasoning behind this lies in something called the commutative properties of space and quantum mechanics. This is not some hairy, eyeball-popping concept but rather a property of order. For instance, in mathematics, multiplication is commutative; 4 ? 6 = 24 = 6 ? 4. Travel through space is also commutative: traveling to a destination that is 4.5km northeast of my current location, I can either go 2km east and then 4km north or 4km north and then 2km east. Some spatial operations, such as rotations, are not always commutative. This property of commutation has great power in quantum mechanics, however, in a slightly less straightforward way. In this case it is the operators, such as position and momentum that do not commute.

Connes has figured out how to construct a space that doesn't commute (e.g., I will not reach the same destination if I reverse the order of my east and north travels). The result is that there are two continuous spaces which are separated by a small "jump." The advantage to this description is that it gives a mathematical trick, called renormalization, a proper foundation which can be tested in experiments. It also predicts the Higgs boson to be about 160 billion electron volts. Just predicting the presence of the Higgs boson, let alone a precise number for its mass places it well ahead of string theory in terms of pure science.

The true strength of Connes' approach lies in his belief that the mathematics behind the physics should give you some insight into the physics. The great failure of string theory is that while a lot has been discovered about mathematics, no physical insight has resulted. On reflection, I think that the other great downfall of string theory is that it starts from the unobservable (very high energy) and works its way down, while most successful theories start from what is known and work their way up.

Read more ...

Friday, August 11, 2006

Are We Enlightened Guardians, Or Are We Apes Designing Humans?

Are We Enlightened Guardians, Or Are We Apes Designing Humans?
by Douglas Mulhall


Thanks in part to molecular manufacturing, accelerated developments in AI and brain reverse-engineering could lead to the emergence of superintelligence in just 18 years. Are we ready for the implications -- like possible annihilation of Homo sapiens? And will we seem to superintelligence what our ape-like ancestors seem to us: primitive?


Originally published in Nanotechnology Perceptions: A Review of Ultraprecision Engineering and Nanotechnology, Volume 2, No. 2, May 8, 2006.



Most students of artificial intelligence are familiar with this forecast made by Vernor Vinge in 19931: "Within thirty years, we will have the technological means to create superhuman intelligence. Shortly after, the human era will be ended."

That was thirteen years ago. Many proponents of super-intelligence say we are on track for that deadline, due to the rate of computing and software advances. Skeptics argue this is nonsense and that we're still decades away from it.

But fewer and fewer argue that it won't happen by the end of this century. This is because history has shown the acceleration of technology to be exponential, as explained in well-known works by inventors such as Ray Kurzweil and Hans Moravec, some of which are elucidated in this volume of essays.

A classic example of technology acceleration is the mapping of the human genome, which achieved most of its progress in the late stages of a multi-year project that critics wrongly predicted would take decades. The rate of mapping at the end of the project was exponential compared to the beginning, due to rapid automation that has since transformed the biotechnology industry.

The same may be true of molecular manufacturing (MM) as self-taught machines learn via algorithms to do things faster, better, and cheaper. I won't describe the technology of MM here because that is well covered in other essays by more competent experts.

MM is important to super-intelligence because it will revolutionize the processes required to understand our own intelligence, such as neural mapping via neural probes that non-destructively map the brain. It also will accelerate three-dimensional computing, where the space between computing units is reduced and efficiency multiplied in the same way that our own brains have done it. Once this happens, the ability to mimic the human brain will accelerate, and self-aware intelligence may follow quickly.

This type of acceleration suggests that Vinge's countdown to the beginning of the end of the human era must be taken seriously.

The pathways by which super-human intelligence could evolve have been well explained by others and include: computer-based artificial intelligence, bioelectronic AI that develops super-intelligence on its own, or human intelligence that is accelerated or merged with AI. Such intelligence might be an enhancement of Homo sapiens, i.e. part of us, or completely separate from us, or both.

Many experts argue that each of these forms of super-intelligence will enhance humans, not replace them, and although they might seem alien to unenhanced humans, they will still be an extension of us because we are the ones who designed them.

The thought behind this is that we will go on as a species.

Critics, however, point to a fly in that ointment. If the acceleration of computing and software continues apace, then super-intelligence, once it emerges, could outpace Homo sapiens, with or without piggybacking on human intelligence.

This would see the emergence of a new species, perhaps similar in some ways, but in other ways fundamentally different from Homo sapiens in terms of intelligence, genetics, and immunology.

If that happens, the gap between Homo sapiens and super-intelligence could quickly become as wide as the gap between apes and Homo sapiens.

Optimists say this won't happen, because everybody will get an upgrade simultaneously when super-intelligence breaks out.

Pessimists say that just a few humans or computers will acquire such intelligence first, and then use it to subjugate the rest of us Homo sapiens.

For clues as to who might be right, let's look at outstanding historical examples of how we've used technology and our own immunology in relation to less technologically adept societies, and in relation to other species.

When technologically superior Europeans arrived in North and South America, the indigenous populations didn't have much time to contemplate such implications because in a just few years, most who came in contact with Europeans were dead from disease. Many who died never laid eyes on a European, as death spread so quickly ahead of the conquerors through unknowing victims.

Europeans at first had no idea that their own immunity to disease would give them such an advantage, but when they realized it, they did everything to use it as a weapon. They did the same with technologies that they consciously invented and knew were superior.

The rapid death of these ancient civilizations, numbering in the tens of millions of persons across two continents, is not etched into the consciousness of contemporary society because those cultures left few written records and had scant time to document their own demise. Most of what they put to pictures or symbols was destroyed by religious zealots or wealth-seeking exploiters.

And so, these civilizations passed quietly into history, leaving only remnants.

By inference, enhanced intelligence easily could take choices about our future out of our hands, and may also be immune to hazards such as mutating viruses that pose dire threats to human society.

Annihilation of Homo sapiens could occur in one of many ways:

* The "oops" factor: accidental annihilation at the hands of a very smart klutz, e.g. by something that is unwittingly immune to things that kill us, or that is smart in one way, but inept in others. Predecessors to super-intelligence may only be smarter than us in some ways, and therein lies a danger. An autistic intelligence could do us in by accident. Just look at current technology, where computers are more capable than humans in some ways but hopeless in others.
* Annihilation in the crossfire of a war-like competition between competing forms of super-intelligence, some of which might include upgraded Homo sapiens. One of the early, deadlier competitions could be for resources as various forms of super-intelligence gobble up space that we occupy, or remake our ecology into an environment more suitable to their needs.
* Deliberate annihilation or assimilation because we are deemed inferior.

If Vernor Vinge is right, we have 18 years before we will face such realities. Centuries ago, the fate of Indian civilizations in North and South America was decided in a similar time span. So, the time to address such risks is now.

This is especially true because paradigms shift more quickly now; therefore, when the event occurs we'll have less time, perhaps five years or even just one, to consider our options.

What might we use as protection against these multi-factorial threats?

Sun Microsystems' cofounder Bill Joy's April 2000 treatise, "Why the future doesn't need us,"2 summarized one field of thought, arguing the case for relinquishment-- eschewing certain technologies due to their inherent risks.

Since that time, most technology proponents have been arguing why relinquishment is impractical. They contend that the march of technology is relentless and we might as well go along for the ride, but with safeguards built in to make sure things don't get too crazy.

Nonetheless, just how we build safeguards into something smarter than us, including an upgraded version of ourselves, has as yet gone unanswered. To see where the solutions might lie, let's again look at the historical perspective.

If we evaluate the arguments between technology optimists and relinquishment pessimists in relation to the history of the natural world, it becomes apparent that we are stuck between a rock and a hard place.

The ‘rock’ in this case could be an asteroid or comet. If we were to relinquish our powerful new technologies, chances are good that an asteroid would eventually collide with Earth, as has occurred before, thus throwing human civilization back to the dark ages or worse.

For those who scoff at this as an astronomical long shot, be reminded that Comet Shoemaker-Levy 9 punched Earth-sized holes in Jupiter less than a decade after the space tools necessary to witness such events were launched, and just when most experts were forecasting such occurrences to be once-in-a-million-year events that we would likely never see.

Or perhaps we would be thrown back by other catastrophic events that have occurred historically, such as naturally induced climate changes triggered by super-volcanos, collapse of the magnetosphere, or an all-encompassing super-nova.

Due to those natural risks, I argue in my book, Our Molecular Future, that we may have no choice but to proceed with technologies that could just as easily destroy us as protect us.

Unfortunately, as explained in the same book, an equally bad "hard place" sits opposite the onrushing "rock" that threatens us. The hard place is our social ineptness.

In the 21st century, despite tremendous progress, we still do amazingly stupid things. We prepare poorly for known threats including hurricanes and tsunamis. We go to war over outdated energy sources such as oil, and some of us increasingly overfeed ourselves while hundreds of millions of people ironically starve. We often value conspicuous consumption over saving impoverished human lives, as low income victims of AIDS or malaria know too well.

Techno-optimists use compelling evidence to argue that we are vanquishing these shortcomings and that new technologies will overcome them completely. But one historical trend bodes against this: emergence of advanced technologies has been overwhelmingly bad for many of the less intelligent species on Earth.

To cite a familiar refrain: We are massacring millions of wild animals and destroying their habitat. We keep billions more domestic farm animals under inhumane, painful, plague-breeding conditions in increasingly vast numbers.

The depth and breadth of this suffering is so vast that we often ignore it, perhaps because it is too terrible to contemplate. When it gets too bothersome, we dismiss it as animal rights extremism. Some of us rationalize it by arguing that nature has always extinguished species, so we are only fulfilling that natural role.

But at its core lies a searing truth: our behavior as guardians of less intelligent species, which we know feel pain and suffering, has been and continues to be atrocious.

If this is our attitude toward less intelligent species, why would the attitude of superior intelligence toward us be different? It would be foolish to assume that a more advanced intelligence than our own, whether advanced in all or in only some ways, will behave benevolently toward us once it sees how we treat other species.

We therefore must consider that a real near-term risk to our civilization is that we invent something which looks at our ways of treating less intelligent species and decides we're not worth keeping, or if we are worth keeping, we should be placed in zoos in small numbers where we can't do more harm. Resulting questions:

* How do we instill into super-intelligence 'ethical' behavior that we ourselves poorly exhibit?

* How do we make sure that super-intelligence rejects certain unsavory practices as we banned slavery?

* Can we reach into the future to prevent a super-intelligence from changing its mind about those ethics?

These questions have been debated, but no broad-based consensus has emerged. Instead, as the discussions run increasingly in circles, they suggest that we as a species might be comparable to 'apes designing humans'.

The ape-like ancestors of Homo sapiens had no idea they were contributing DNA to a more intelligent species. Nor could they hope to comprehend it. Likewise, can we Homo sapiens expect to comprehend what we are contributing to a super-intelligent species that follows us?

As long as we continue to exercise callous neglect as guardians of species less intelligent than ourselves, it could be argued that we are much like our pre-human ancestors: incapable of consciously influencing what comes after us.

The guardianship issue leads to another question: How well are we balancing technology advantages against risks?

In the mere 60 years since our most powerful weapons—nuclear bombs—were invented, we've kept them mostly under wraps and congratulated ourselves for that, but we have also seen them proliferate from at first just one country to at least ten, with some of those balanced on the edge of chaos.

Likewise, in the nanoscale technology world that precedes molecular manufacturing, we've begun assessing risks posed to human health by engineered nanoparticles, but those particles are already being put into our environment and into us.

In other words, we are still closing the proverbial barn doors after the animals have escaped. This limited level of foresight is light years away from being able to assess how to control the onrushing risks of molecular manufacturing or of enhanced intelligence.

Many accomplished experts have pointed out that the same empowerment of individuals by technologies such as the Internet and biotech could make unprecedented weapons available to small disaffected groups.

Technology optimists argue that this has occurred often in history: new technologies bring new pros and cons, and after we make some awful mistakes with them, things get sorted out.

However, in this case the acceleration rate by its nature puts these technologies in a class of their own, because the evidence suggests they are running ahead of our capacities to contain or balance them. Moreover, the number of violently disaffected groups in our society who could use them is substantial.

To control this, do we need a "pre-crime" capacity as envisaged in the film Minority Report, where Big Brother methods are applied to anticipate crime and strike it down preemptively?

The pros and cons of preemptive strikes have been well elucidated recently. The idea of giving up our freedom in order to preserve our freedom from attack by disaffected groups is being heavily debated right now, without much agreement.

However, one thing seems to have been under-emphasized in these security debates:

Until we do the blatantly positive things such as eliminate widespread diseases, feed the starving, house the homeless, disenfranchise dictators, stop torture, stop inhumane treatment of less intelligent species, and other do-good things that are treated today like platitudes, we will not get rid of violently disaffected groups.

By doing things that are blatantly humane, (despite the efforts of despots and their extremist anti-terrorist counterparts to belittle them as wimpy) we might accomplish two things at once: greatly reduce the numbers of violently disaffected groups, and present ourselves to super-intelligence as being enlightened guardians.

Otherwise, if we continue along the present path, we may someday seem to superintelligence what our ape-like ancestors seem to us: primitive.

In deciding what to do about Homo sapiens, a superior form of intelligence might first evaluate our record as guardians, such as how we treat species less intelligent than ourselves, and how we treat members of our same species that are less technologically adept or just less fortunate.

Why might super-intelligences look at this first? Because just as we are guardians of those less intelligent or fortunate than us, so super-intelligences will be the guardians of us and of other less intelligent species. Super-intelligences will have to decide what to do with us, and with them.

If Vinge is accurate in his forecast, we don't have much time to set these things straight before someone or something superior to us makes a harsh evaluation.

Being nice to dumb animals or poor people is by no means the only way of assuring survival of our species in the face of something more intelligent than us. Using technology to massively upgrade human intelligence is also a prerequisite. But that, on its own, may not be sufficient.

Compassion by those who possess overwhelming advantages over others is one of the special characteristics that Homo sapiens (along with a few other mammals) brings to this cold universe. It is what separates us from an asteroid or super-nova that doesn't care whether it wipes us out.

Further, compassionate behavior is something most of us could agree on, and while it is often misinterpreted by some as a weakness, it is also what makes us human, and what most of us would want to contribute to future species.

If that is so, then let's take the risk of being compassionate and put it into practice by launching overarching works that demonstrate the best of what we are.

For example, use molecular manufacturing and its predecessor nanotechnologies to eliminate the disease of aging, instead of treating the symptoms. That is what I personally have decided to focus on, but there are many other good examples out there, including synthesized meat that eliminates inhumane treatment of billions of animals, and cheap photovoltaic electricity that could slash our dependence on oil—and end wars over it.

Such works are not hard to identify. We just have to give them priority. Perhaps then we will seem less like our unwitting ancestors and more like enlightened guardians.

Are We Enlightened Guardians, Or Are We Apes Designing Humans?
by Douglas Mulhall

Thanks in part to molecular manufacturing, accelerated developments in AI and brain reverse-engineering could lead to the emergence of superintelligence in just 18 years. Are we ready for the implications -- like possible annihilation of Homo sapiens? And will we seem to superintelligence what our ape-like ancestors seem to us: primitive?


Originally published in Nanotechnology Perceptions: A Review of Ultraprecision Engineering and Nanotechnology, Volume 2, No. 2, May 8, 2006. Reprinted with permission on KurzweilAI.net, May 22, 2006.

Most students of artificial intelligence are familiar with this forecast made by Vernor Vinge in 19931: "Within thirty years, we will have the technological means to create superhuman intelligence. Shortly after, the human era will be ended."

That was thirteen years ago. Many proponents of super-intelligence say we are on track for that deadline, due to the rate of computing and software advances. Skeptics argue this is nonsense and that we're still decades away from it.

But fewer and fewer argue that it won't happen by the end of this century. This is because history has shown the acceleration of technology to be exponential, as explained in well-known works by inventors such as Ray Kurzweil and Hans Moravec, some of which are elucidated in this volume of essays.

A classic example of technology acceleration is the mapping of the human genome, which achieved most of its progress in the late stages of a multi-year project that critics wrongly predicted would take decades. The rate of mapping at the end of the project was exponential compared to the beginning, due to rapid automation that has since transformed the biotechnology industry.

The same may be true of molecular manufacturing (MM) as self-taught machines learn via algorithms to do things faster, better, and cheaper. I won't describe the technology of MM here because that is well covered in other essays by more competent experts.

MM is important to super-intelligence because it will revolutionize the processes required to understand our own intelligence, such as neural mapping via neural probes that non-destructively map the brain. It also will accelerate three-dimensional computing, where the space between computing units is reduced and efficiency multiplied in the same way that our own brains have done it. Once this happens, the ability to mimic the human brain will accelerate, and self-aware intelligence may follow quickly.

This type of acceleration suggests that Vinge's countdown to the beginning of the end of the human era must be taken seriously.

The pathways by which super-human intelligence could evolve have been well explained by others and include: computer-based artificial intelligence, bioelectronic AI that develops super-intelligence on its own, or human intelligence that is accelerated or merged with AI. Such intelligence might be an enhancement of Homo sapiens, i.e. part of us, or completely separate from us, or both.

Many experts argue that each of these forms of super-intelligence will enhance humans, not replace them, and although they might seem alien to unenhanced humans, they will still be an extension of us because we are the ones who designed them.

The thought behind this is that we will go on as a species.

Critics, however, point to a fly in that ointment. If the acceleration of computing and software continues apace, then super-intelligence, once it emerges, could outpace Homo sapiens, with or without piggybacking on human intelligence.

This would see the emergence of a new species, perhaps similar in some ways, but in other ways fundamentally different from Homo sapiens in terms of intelligence, genetics, and immunology.

If that happens, the gap between Homo sapiens and super-intelligence could quickly become as wide as the gap between apes and Homo sapiens.

Optimists say this won't happen, because everybody will get an upgrade simultaneously when super-intelligence breaks out.

Pessimists say that just a few humans or computers will acquire such intelligence first, and then use it to subjugate the rest of us Homo sapiens.

For clues as to who might be right, let's look at outstanding historical examples of how we've used technology and our own immunology in relation to less technologically adept societies, and in relation to other species.

When technologically superior Europeans arrived in North and South America, the indigenous populations didn't have much time to contemplate such implications because in a just few years, most who came in contact with Europeans were dead from disease. Many who died never laid eyes on a European, as death spread so quickly ahead of the conquerors through unknowing victims.

Europeans at first had no idea that their own immunity to disease would give them such an advantage, but when they realized it, they did everything to use it as a weapon. They did the same with technologies that they consciously invented and knew were superior.

The rapid death of these ancient civilizations, numbering in the tens of millions of persons across two continents, is not etched into the consciousness of contemporary society because those cultures left few written records and had scant time to document their own demise. Most of what they put to pictures or symbols was destroyed by religious zealots or wealth-seeking exploiters.

And so, these civilizations passed quietly into history, leaving only remnants.

By inference, enhanced intelligence easily could take choices about our future out of our hands, and may also be immune to hazards such as mutating viruses that pose dire threats to human society.

Annihilation of Homo sapiens could occur in one of many ways:

* The "oops" factor: accidental annihilation at the hands of a very smart klutz, e.g. by something that is unwittingly immune to things that kill us, or that is smart in one way, but inept in others. Predecessors to super-intelligence may only be smarter than us in some ways, and therein lies a danger. An autistic intelligence could do us in by accident. Just look at current technology, where computers are more capable than humans in some ways but hopeless in others.
* Annihilation in the crossfire of a war-like competition between competing forms of super-intelligence, some of which might include upgraded Homo sapiens. One of the early, deadlier competitions could be for resources as various forms of super-intelligence gobble up space that we occupy, or remake our ecology into an environment more suitable to their needs.
* Deliberate annihilation or assimilation because we are deemed inferior.

If Vernor Vinge is right, we have 18 years before we will face such realities. Centuries ago, the fate of Indian civilizations in North and South America was decided in a similar time span. So, the time to address such risks is now.

This is especially true because paradigms shift more quickly now; therefore, when the event occurs we'll have less time, perhaps five years or even just one, to consider our options.

What might we use as protection against these multi-factorial threats?

Sun Microsystems' cofounder Bill Joy's April 2000 treatise, "Why the future doesn't need us,"2 summarized one field of thought, arguing the case for relinquishment-- eschewing certain technologies due to their inherent risks.

Since that time, most technology proponents have been arguing why relinquishment is impractical. They contend that the march of technology is relentless and we might as well go along for the ride, but with safeguards built in to make sure things don't get too crazy.

Nonetheless, just how we build safeguards into something smarter than us, including an upgraded version of ourselves, has as yet gone unanswered. To see where the solutions might lie, let's again look at the historical perspective.

If we evaluate the arguments between technology optimists and relinquishment pessimists in relation to the history of the natural world, it becomes apparent that we are stuck between a rock and a hard place.

The ‘rock’ in this case could be an asteroid or comet. If we were to relinquish our powerful new technologies, chances are good that an asteroid would eventually collide with Earth, as has occurred before, thus throwing human civilization back to the dark ages or worse.

For those who scoff at this as an astronomical long shot, be reminded that Comet Shoemaker-Levy 9 punched Earth-sized holes in Jupiter less than a decade after the space tools necessary to witness such events were launched, and just when most experts were forecasting such occurrences to be once-in-a-million-year events that we would likely never see.

Or perhaps we would be thrown back by other catastrophic events that have occurred historically, such as naturally induced climate changes triggered by super-volcanos, collapse of the magnetosphere, or an all-encompassing super-nova.

Due to those natural risks, I argue in my book, Our Molecular Future, that we may have no choice but to proceed with technologies that could just as easily destroy us as protect us.

Unfortunately, as explained in the same book, an equally bad "hard place" sits opposite the onrushing "rock" that threatens us. The hard place is our social ineptness.

In the 21st century, despite tremendous progress, we still do amazingly stupid things. We prepare poorly for known threats including hurricanes and tsunamis. We go to war over outdated energy sources such as oil, and some of us increasingly overfeed ourselves while hundreds of millions of people ironically starve. We often value conspicuous consumption over saving impoverished human lives, as low income victims of AIDS or malaria know too well.

Techno-optimists use compelling evidence to argue that we are vanquishing these shortcomings and that new technologies will overcome them completely. But one historical trend bodes against this: emergence of advanced technologies has been overwhelmingly bad for many of the less intelligent species on Earth.

To cite a familiar refrain: We are massacring millions of wild animals and destroying their habitat. We keep billions more domestic farm animals under inhumane, painful, plague-breeding conditions in increasingly vast numbers.

The depth and breadth of this suffering is so vast that we often ignore it, perhaps because it is too terrible to contemplate. When it gets too bothersome, we dismiss it as animal rights extremism. Some of us rationalize it by arguing that nature has always extinguished species, so we are only fulfilling that natural role.

But at its core lies a searing truth: our behavior as guardians of less intelligent species, which we know feel pain and suffering, has been and continues to be atrocious.

If this is our attitude toward less intelligent species, why would the attitude of superior intelligence toward us be different? It would be foolish to assume that a more advanced intelligence than our own, whether advanced in all or in only some ways, will behave benevolently toward us once it sees how we treat other species.

We therefore must consider that a real near-term risk to our civilization is that we invent something which looks at our ways of treating less intelligent species and decides we're not worth keeping, or if we are worth keeping, we should be placed in zoos in small numbers where we can't do more harm. Resulting questions:

* How do we instill into super-intelligence 'ethical' behavior that we ourselves poorly exhibit?

* How do we make sure that super-intelligence rejects certain unsavory practices as we banned slavery?

* Can we reach into the future to prevent a super-intelligence from changing its mind about those ethics?

These questions have been debated, but no broad-based consensus has emerged. Instead, as the discussions run increasingly in circles, they suggest that we as a species might be comparable to 'apes designing humans'.

The ape-like ancestors of Homo sapiens had no idea they were contributing DNA to a more intelligent species. Nor could they hope to comprehend it. Likewise, can we Homo sapiens expect to comprehend what we are contributing to a super-intelligent species that follows us?

As long as we continue to exercise callous neglect as guardians of species less intelligent than ourselves, it could be argued that we are much like our pre-human ancestors: incapable of consciously influencing what comes after us.

The guardianship issue leads to another question: How well are we balancing technology advantages against risks?

In the mere 60 years since our most powerful weapons—nuclear bombs—were invented, we've kept them mostly under wraps and congratulated ourselves for that, but we have also seen them proliferate from at first just one country to at least ten, with some of those balanced on the edge of chaos.

Likewise, in the nanoscale technology world that precedes molecular manufacturing, we've begun assessing risks posed to human health by engineered nanoparticles, but those particles are already being put into our environment and into us.

In other words, we are still closing the proverbial barn doors after the animals have escaped. This limited level of foresight is light years away from being able to assess how to control the onrushing risks of molecular manufacturing or of enhanced intelligence.

Many accomplished experts have pointed out that the same empowerment of individuals by technologies such as the Internet and biotech could make unprecedented weapons available to small disaffected groups.

Technology optimists argue that this has occurred often in history: new technologies bring new pros and cons, and after we make some awful mistakes with them, things get sorted out.

However, in this case the acceleration rate by its nature puts these technologies in a class of their own, because the evidence suggests they are running ahead of our capacities to contain or balance them. Moreover, the number of violently disaffected groups in our society who could use them is substantial.

To control this, do we need a "pre-crime" capacity as envisaged in the film Minority Report, where Big Brother methods are applied to anticipate crime and strike it down preemptively?

The pros and cons of preemptive strikes have been well elucidated recently. The idea of giving up our freedom in order to preserve our freedom from attack by disaffected groups is being heavily debated right now, without much agreement.

However, one thing seems to have been under-emphasized in these security debates:

Until we do the blatantly positive things such as eliminate widespread diseases, feed the starving, house the homeless, disenfranchise dictators, stop torture, stop inhumane treatment of less intelligent species, and other do-good things that are treated today like platitudes, we will not get rid of violently disaffected groups.

By doing things that are blatantly humane, (despite the efforts of despots and their extremist anti-terrorist counterparts to belittle them as wimpy) we might accomplish two things at once: greatly reduce the numbers of violently disaffected groups, and present ourselves to super-intelligence as being enlightened guardians.

Otherwise, if we continue along the present path, we may someday seem to superintelligence what our ape-like ancestors seem to us: primitive.

In deciding what to do about Homo sapiens, a superior form of intelligence might first evaluate our record as guardians, such as how we treat species less intelligent than ourselves, and how we treat members of our same species that are less technologically adept or just less fortunate.

Why might super-intelligences look at this first? Because just as we are guardians of those less intelligent or fortunate than us, so super-intelligences will be the guardians of us and of other less intelligent species. Super-intelligences will have to decide what to do with us, and with them.

If Vinge is accurate in his forecast, we don't have much time to set these things straight before someone or something superior to us makes a harsh evaluation.

Being nice to dumb animals or poor people is by no means the only way of assuring survival of our species in the face of something more intelligent than us. Using technology to massively upgrade human intelligence is also a prerequisite. But that, on its own, may not be sufficient.

Compassion by those who possess overwhelming advantages over others is one of the special characteristics that Homo sapiens (along with a few other mammals) brings to this cold universe. It is what separates us from an asteroid or super-nova that doesn't care whether it wipes us out.

Further, compassionate behavior is something most of us could agree on, and while it is often misinterpreted by some as a weakness, it is also what makes us human, and what most of us would want to contribute to future species.

If that is so, then let's take the risk of being compassionate and put it into practice by launching overarching works that demonstrate the best of what we are.

For example, use molecular manufacturing and its predecessor nanotechnologies to eliminate the disease of aging, instead of treating the symptoms. That is what I personally have decided to focus on, but there are many other good examples out there, including synthesized meat that eliminates inhumane treatment of billions of animals, and cheap photovoltaic electricity that could slash our dependence on oil—and end wars over it.

Such works are not hard to identify. We just have to give them priority. Perhaps then we will seem less like our unwitting ancestors and more like enlightened guardians.

1. The Coming Technological Singularity: How to Survive in the Post-Human Era http://www-rohan.sdsu.edu/faculty/vinge/misc/singularity.htm

The Singularity is near...

In cosmology, the word singularity is used to describe the event horizons created by physical processes so fabulous that essentially no information can be transmitted from them. Among these are black holes, whose gravities do not permit light to escape, and the big bang, before which nothing is knowable.

In either case, these technical uses of the word have human connotations of uniqueness, incomprehensibility and danger. So it is perhaps not surprising that technofuturists and transhumanists see humanity and possibly all of creation hurtling toward something they call the Singularity.

The idea was popularized by San Diego State University mathematician Verner Vinge in the 1990s and given renewed attention in 2005 by the storied inventor Ray Kurzweil with the publication of his book The Singularity Is Near: When Humans Transcend Biology.

In a precursor article, "The Law of Accelerating Returns," published in 2001, Kurzweil wrote: "Within a few decades, machine intelligence will surpass human intelligence, leading to The Singularity -- technological change so rapid and profound it represents a rupture in the fabric of human history. The implications include the merger of biological and non-biological intelligence, immortal software-based humans, and ultrahigh levels of intelligence that expand outward in the universe at the speed of light."

This millenarian vision of a positive feedback loop of ever-expanding intelligence and organization creates what might be called anti-entropy. When mankind reaches the Singularity, the universe will no longer be dominated by entropy. On the Web, there are sites for supporters of this philosophy, who identify themselves as extropians.

This change has also been viewed more ambiguously. For example, Vinge wrote of machine intelligence in a paper in 1993: "Within 30 years, we will have the technological means to create superhuman intelligence. Shortly after, the human era will be ended.

Kurzweil's understanding of the Singularity, in contrast, is an unclouded one in which machine intelligence and human brains fuse for a future in which human/ machine hybrids invent ever-smarter machines and hybrids, and do this at ever- accelerating rates. They achieve a kind of immortality.

Kurzweil envisions the possibility of downloading brains and reconstituting them, thereby successfully propagating one person's consciousness, bringing a whole new perspective to Alan Turing's take on the question of whether machines can be said to think.

Even biological immortality is possible, according to Kurzweil, because of what he calls the three overlapping revolutions of GNR -- genetics, nanotechnology and robotics. The superhuman intelligences of the coming decades will know which genes to turn on and off in order to prolong life indefinitely. Nanotechnology will enable the infusion of human bodies with robotic servants to repair biological tissues and aid in the downloading of brains.

And all of this is coming sooner than we think, according to Kurzweil and fellow futurists. Using the evidence of Moore's Law concerning the doubling of computer power as a paradigm, Kurzweil identifies exponential growth in the capacity of information technology with a biblical sweep that stretches from the beginning through six epochs:
  1. Physics and Chemistry -- from the big bang through the entire prelife era of the universe.
  2. Biology and DNA -- stretching from the beginning of life on earth.
  3. Brains -- the advent of human dominance.
  4. Technology -- approaching culmination in the 20th century.
  5. Merger of Human Technology and Human Intelligence -- which is the Singularity.
  6. The Universe Wakes Up -- the other side of the Singularity.
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Sunday, July 02, 2006

Cyclic universe' can explain cosmological constant

A cyclic universe, which bounces through a series of big bangs and "big crunches", could solve the puzzle of our cosmological constant, physicists suggest.

The cosmological constant represents the energy of empty space, and is thought to be the most likely explanation for the observed speeding up of the expansion of the universe. But its measured value is a googol (1 followed by 100 zeroes) times smaller than that predicted by particle physics theories. It is a discrepancy that gives cosmologists a real headache.

In the 1980s, physicists considered the possibility that an initially large cosmological constant could decay down to the value measured today. But this theory was abandoned when calculations showed that it would take far longer than 14 billion years – the time since the big bang – for the constant to reach the level seen today.

Now physicists Paul Steinhardt at Princeton University, in New Jersey, US, and Neil Turok at Cambridge University in the UK, are resurrecting the idea. They point out that if time stretches back beyond the big bang, the problem could be solved. At that is just what is predicted by their cyclic model of the universe – an alternative to the Standard Big Bang theory – which the pair first developed in 2002.

According to Steinhardt and Turok, today's universe is part of an endless cycle of big bangs and big crunches, with each cycle lasting about a trillion years. At every big bang, the amount of matter and radiation in the universe is reset, but the cosmological constant is not. Instead, the cosmological constant gradually diminishes over many cycles to the small value observed today.

The physicists' calculations show that the cosmological constant decreases in steps, through a series of quantum transitions. Crucially, the higher the value of the constant, the more rapid the transitions. But as the constant reaches lower levels, it changes more slowly, lingering on the lowest positive value for an extremely long time. That means that today's universe is most likely to have a small cosmological constant, just as we currently observe.

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Wednesday, April 26, 2006

Euclid's Fourteenth Book

When a famous mathematician has something new to say, the whole world pays attention. Euclid's Elements, which presented the state of the art in geometry around 300 B.C., has been extraordinarily influential. This massive, 13-volume compendium set the standard for mathematical exposition and precise discourse for many centuries.

What's more, there is compelling evidence that Euclid of Alexandria (c. 365–275 B.C.) had a fourteenth book in mind. Officials of the Avril Foundation for Old Occidental Languages have announced that, after a year devoted to authentication and analysis, they are prepared to release the text of a manuscript that appears to be a Latin translation of research notes jotted down by Euclid in preparation for writing a fourteenth volume of Elements.

It's clear that Euclid was uncomfortable with the fifth and most complicated of the five postulates that begin Elements. This postulate states, "If a straight line falling on two straight lines makes the interior angles on the same side less than two right angles, the two straight lines, if produced indefinitely, meet on that side on which the angles are less than two right angles."

Euclid's newly discovered notes propose an alternative way of expressing this notion: "Through any given point can be drawn exactly one straight line parallel to a given straight line." Euclid went on to consider two other cases: In one case, no parallel line can be drawn through the point, and in the other case, more than one parallel line can be drawn. In these two situations, he says, the sum of the interior angles of a triangle is no longer exactly equal to two right angles.

On the surface of a sphere, for example, the sum of the angles of any triangle is greater than two right angles, Euclid notes. Such a geometry has no parallel lines, yet it obeys his first four postulates.

The manuscript hints that Euclid also explored the curious geometry that arises from the existence of multiple parallels. "I have discovered things so wonderful that I was astounded," he wrote at one point. "Out of nothing I have created a strange, new world." Unfortunately, much of this section of the manuscript has deteriorated beyond repair, so only a few tantalizing fragments remain.

Euclid also shows how it's possible to build a star-like figure out of triangles. He starts with a large equilateral triangle, then breaks up each side with a protruding equilateral triangle one-third as large. Then he repeats the procedure with each new side, adding successively smaller triangles. He calls the resulting shape an "asteroid."

Euclid's "asteroid"

Euclid went on to speculate about how such self-similar forms may be useful for describing natural objects. "Clouds are not spheres, mountains are not cones, coastlines are not circles, and bark is not smooth, nor does lightning travel in a straight line," he commented.

One highly cryptic section of Euclid's notes refers to a massive computational project. He apparently had hundreds of students over a period of many years computing the squares of numbers, taking differences, and obtaining answers that served as starting points for successive steps in some kind of procedure for creating fanciful mosaics.
Graphic output of Euclid's massive, student-powered computational project.

Euclid also spent time looking at extensions of the Pythagorean relationship (Proposition I.47). In his notes, he presented an ingenious argument to prove that the area of a right-angle triangle whose sides are all whole numbers cannot be a square of a whole number. Furthermore, he noted that it is impossible for a cube to be written as the sum of two cubes or a fourth power to be written as the sum of two fourth powers. Then he took a giant leap in conjecturing that the same thing holds for all powers greater than two. Euclid left an intriguing note: "I have a truly marvelous demonstration of this proposition which this page is too small to contain". The astonishingly wide range of these investigations and speculations means that our use of the term "non-Euclidean geometry" is clearly misleading. We can now honestly say that it's all Euclidean geometry.

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Saturday, April 01, 2006

Genes decide if coffee hurts or helps your heart

Coffee can raise or reduce your chances of suffering a heart attack – it all depends on your genes, researchers suggest.

People with a genetic makeup that causes them to metabolise caffeine more slowly have a 36% greater risk of heart attack if they drink two to three cups of coffee a day than people with the same gene who drink one cup or less a day, according to a new study. And if they drink more than four cups, this risk rises to 64%. On the other hand, individuals who metabolised caffeine quickly and consumed two to three cups of coffee a day had a 22% reduction in the risk of heart attack compared with those with the same genetic makeup who consumed just one cup or less each day.

In the late 1990s researchers discovered that humans carry variants of the gene for an enzyme that breaks down caffeine in the body. People who carry two copies of the CYP1A2*1A gene may break down caffeine up to four times faster than those carrying the CYP1A2*1F gene.

The study showed that two to three cups of coffee per day caused a 36% rise in risk of heart attack among people who carried the CYP1A2*1F gene – and drinking four or more cups a day caused a 64% increase in the same group. Increased levels of circulating caffeine may block adenosine’s action, causing blood vessels to constrict, subsequently triggering a heart attack. About 55% of those involved in the study carried the gene for slow caffeine metabolism.

People who were homozygous for CYP1A2*1A – meaning they carried two copies of gene for fast caffeine-metabolism – actually reduced their risk of heart attack by drinking coffee. Among these volunteers, two to three cups of coffee caused a 22% decrease in heart attack risk. Drinking more than four cups of coffee only nominally reduced their chances of a heart attack.

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Wednesday, February 22, 2006

Stroke Brain Fix

During a stroke, brain cells die from a lack of oxygen. But brain researchers may have found a way to make stroke-damaged nerve cells re-grow.

When a stroke occurs, blood flow to part of the brain is interrupted when a blood vessel becomes damaged or blocked. The blood normally brings oxygen and nutrients that the brain cells in the immediate area need to survive. Without the blood the brain cells begin to die and stroke victims lose the functions that were controlled by those brain cells. About 80 percent of all strokes are ischemic, caused by a blood clot that blocks a blood vessel or artery in the brain. The other 20 percent are caused by a weakened blood vessel that breaks and bleeds into the brain. This is known as hemorrhagic stroke, and is often fatal. Around 600,000 new strokes, or "brain attacks" are reported each year.

In the developing systems of young people and other animals, the central nervous system (CNS), which consists of around ten billion nerve cells, have the ability to spontaneously grow new nerve cell connections. But, when these young animals grow up and their nervous systems mature, this spontaneous re-growth no longer occurs — something is blocking it. In recent years, an international team of brain researchers, led by Swiss neurologist Martin Schwab, discovered that a protein called "Nogo-A" inhibits the re-growth and repair of injured nerve cells of the brain and spinal cord in adults.

In tests on stroke-damaged rats a research team used a very specific antibody, an immune-system protein, to stop Nogo-A from binding to receptors on nerve cells. Without the inhibitory affect of Nogo-A, the injured nerve cells were able to re-grow, restoring lost movement to the front paws of the rats. A week after the stroke, the rats began the two-week antibody treatment to block Nogo-A. Just nine weeks after the treatment the aged rats recovered the use of their paralyzed paws.

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Thursday, January 26, 2006

New study is boost to homeopathy

A six-year study at Bristol Homeopathic Hospital shows over 70% of patients with chronic diseases reported positive health changes after treatment.

More than 6,500 patients took part in the study with problems ranging from eczema to menopause and arthritis.The biggest improvements were seen in children - 89% of under 16s with asthma reported improvement.Of the group, 75% felt 'better' or 'much better', as did 68% of eczema patients under 16.

The results come just months after a study in The Lancet concluded that using homeopathy was no better than taking dummy drugs.

Dr David Spence, Clinical Director and Consultant Physician at Bristol Homeopathic Hospital and Chairman of the British Homeopathic Association, a co-author of the new study, said: "These results clearly demonstrate the value of homeopathy in the NHS.". All the patients were referred by their GP or hospital specialist and many had tried conventional treatment first without success.

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Path to true happiness 'revealed'

Experts believe they have found the essential ingredients to make a person's life happier.

In an unusual three-month experiment, six specialists from a variety of disciplines worked to improve the happiness levels of a typical UK town. The experts tried and tested 10 simple measures in the quest for happiness:

  • Plant something and nurture it
  • Count your blessings - at least five - at the end of each day
  • Take time to talk - have an hour-long conversation with a loved one each week
  • Phone a friend whom you have not spoken to for a while and arrange to meet up
  • Give yourself a treat every day and take the time to really enjoy it
  • Have a good laugh at least once a day
  • Get physical - exercise for half an hour three times a week
  • Smile at and/or say hello to a stranger at least once each day
  • Cut your TV viewing by half
  • Spread some kindness - do a good turn for someone every day
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Low carb diets 'cut heart energy'

Scientists have found high fat, low carbohydrate diets can reduce energy to the heart.

Many people have lost weight quickly by following such diets - but scientists fear they may not be good for health in the longer term. The Oxford team monitored 19 people over a two week period. They found that the energy stored in the heart was reduced by an average of 16% among those who followed a high fat, low carbohydrate diet. In some people the energy reduction was as much as a third. Their hearts also became slightly 'stiffer' - not relaxing quite as well as before the diet. One of the participants even noticed he could not manage his daily run while on the diet. The changes were reversed within two weeks after returning to a normal diet.

Professor Peter Weissberg, BHF medical director, said: "Diet devotees can be reassured that this research in no way suggests that the high fat-low carb regime is going to give them heart failure.

"However, they should be aware that such unbalanced diets are a major insult on their bodies' metabolism and, as this study shows, may be having direct effects on their hearts, particularly since they tend to be high in saturated fat. We would certainly not recommend high fat-low carb diets to anyone who wants to lose weight and look after their heart. Achieving this with a balanced diet and regular exercise is sustainable for life and, for most people, is the safest way for your heart."

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Monday, January 16, 2006

Stalin's half-man, half-ape super-warriors


The Soviet dictator Josef Stalin ordered the creation of Planet of the Apes-style warriors by crossing humans with apes, according to recently uncovered secret documents. Moscow archives show that in the mid-1920s Russia's top animal breeding scientist, Ilya Ivanov, was ordered to turn his skills from horse and animal work to the quest for a super-warrior.

According to Moscow newspapers, Stalin told the scientist: "I want a new invincible human being, insensitive to pain, resistant and indifferent about the quality of food they eat". In 1926 the Politburo in Moscow passed the request to the Academy of Science with the order to build a "living war machine".

Mr Ivanov's experiments, unsurprisingly from what we now know, were a total failure. He returned to the Soviet Union, only to see experiments in Georgia to use monkey sperm in human volunteers similarly fail.

A final attempt to persuade a Cuban heiress to lend some of her monkeys for further experiments reached American ears, with the New York Times reporting on the story, and she dropped the idea amid the uproar.

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Tuesday, January 10, 2006

Take a leap into hyperspace

An extraordinary "hyperspace" engine that could make interstellar space travel a reality by flying into other dimensions is being investigated by the United States government.


The hypothetical device, which has been outlined in principle but is based on a controversial theory about the fabric of the universe, could potentially allow a spacecraft to travel to Mars in three hours and journey to a star 11 light years away in just 80 days, according to a report in today's New Scientist magazine.

The theoretical engine works by creating an intense magnetic field that, according to ideas first developed by the late scientist Burkhard Heim in the 1950s, would produce a gravitational field and result in thrust for a spacecraft.

Also, if a large enough magnetic field was created, the craft would slip into a different dimension, where the speed of light is faster, allowing incredible speeds to be reached. Switching off the magnetic field would result in the engine reappearing in our current dimension.

The US air force has expressed an interest in the idea and scientists working for the American Department of Energy - which has a device known as the Z Machine that could generate the kind of magnetic fields required to drive the engine - say they may carry out a test if the theory withstands further scrutiny.

Professor Jochem Hauser, one of the scientists who put forward the idea, told that if everything went well a working engine could be tested in about five years.

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Thursday, January 05, 2006

Vitamin D May Lower Some Cancer Risk

There is growing evidence that vitamin D helps protect against colorectal cancer, and now a group of researchers who have long studied the vitamin say the same is true for breast cancer and ovarian cancer.

In a new analysis, the researchers contend that taking 1,000 international units (IU) of vitamin D daily can cut colon, breast, and ovarian cancer risk.

The researchers urged public health officials to increase recommendations for vitamin D consumption, calling the vitamin an inexpensive tool for preventing cancers that claim millions of lives each year.

The easiest way for the body to get vitamin D is through sun exposure, because UV rays from the sun trigger the natural synthesis of the vitamin in the body. Someone who spends 10 to 15 minutes in the sun on a sunny day without sunscreen can absorb 2,000 to 5,000 IU of vitamin D if 40% of the body is exposed. While supplements and foods are the only choice for people who cannot tolerate the sun, most people can safely spend 10 to 15 minutes in the sun each day.

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