Tag: Physics

Through This Building Shines the Cosmos

[Image: Collage by BLDGBLOG of public domain images from NASA and the Library of Congress.]

An opportunity to explore the use of muons as a tool for architectural and archaeological imaging came up this summer while I was in Europe for my Graham Foundation project, “Invisible Cities.”

Muons are cosmic particles, similar to neutrinos, that pass through us constantly—but also through solid rock and concrete, through cathedrals, pyramids, dams, and roads. In the 1960s, physicist Luis W. Alvarez of UC Berkeley launched a whole new form of architectural imaging when he realized that, if you can capture muons as they leave various structures—in Alvarez’s case, the Pyramid of Khafre outside Cairo—then you can create an image of what they’ve just passed through.

This is now known as muography—muon photography. Muography, as I describe it in a new story published in this weekend’s Financial Times Magazine—my first cover story!—is “one part comic-book superpower, one part cosmic photography.”

Fast-forward to 2022, and muons are on the cusp of being adopted as a new tool for infrastructural inspection, allowing engineers to peer inside the supports of bridges and freeways, inside the concrete of hydroelectric dams and high-rise apartment blocks, even inside the thick, dense masonry of Renaissance cathedrals and ancient temples, looking for signs of corrosion, decay, and impending collapse.

For the Financial Times, I went to Berlin to meet an engineer leading Germany’s federal effort to test and certify muon-inspection technology, with the goal of turning an obscure physics experiment into a commercial tool. The lab I visited there was incredible, an industrial space lit by skylights in the city’s southwest suburbs, filled with massive concrete monoliths, each marked with Agnes Martin-like grids. These dense concrete slabs—modern obelisks—are used to test non-destructive imaging technologies. In the piece, I compare the lab to a Brutalist sculpture garden.

While German authorities (in this case, working with a physicist at the University of Glasgow) work to set standards and protocols for muography in the global marketplace, the most charismatic proof-of-concept for muons’ future use might come from Florence, Italy.

That’s where a muon detector will likely be installed later this year, imaging the walls of Brunelleschi’s famous dome. The cathedral there is a constantly settling, dynamic system—far from static—and the overwhelming weight of Brunelleschi’s dome has produced large cracks in the church walls below. Those cracks have been growing wider for centuries, leading to enough concern that the entire church is now enreefed with measuring devices—“giving it a solid claim as the world’s most carefully monitored structure,” as the New York Times wrote as long ago as 1987.

[Image: Looking up into Brunelleschi’s Dome, Florence; photo by Geoff Manaugh.]

Because Brunelleschi left behind no drawings or even textual descriptions of how his dome had been assembled, today’s engineers remain in the dark about how to reinforce it. With walls up to two meters thick, the masonry is too dense for traditional imaging methods, such as radar and ultrasound. But muons can easily pass through the entire cathedral; they are generated freely by natural reactions between cosmic rays and the Earth’s upper atmosphere; and they can be detected with a device that requires almost no electricity to run.

In any case, I’ve been obsessed with muons for more than a decade, so this was an absolute thrill to report. The Financial Times has a rigorous paywall, however, so it will be hard to read the piece without a subscription, but if you see a copy of the magazine kicking around at your local newsstand, grab a copy and dive into the cosmic future of large-scale architectural imaging.

[Thanks again to the Graham Foundation for Advanced Studies in the Fine Arts for funding this research. A great, but not widely known, book on Brunelleschi’s dome, with superb illustrations, is Brunelleschi’s Cupola by Giovanni Fanelli and Michele Fanelli.]

Looming Matter With Light

“When light collides with other light, it can transform into particles of matter,” science writer Corey S. Powell posted on Twitter the other day. He was referring to recent evidence from the Relativistic Heavy Ion Collider that “pairs of electrons and positrons—particles of matter and antimatter—can be created directly by colliding very energetic photons.” In other words, the “conversion of energetic light into matter” might be physically achievable: you can create matter with light.

I am in no position to comment on the science of this beyond the sheer poetry of the description; if you want to learn more about the actual experiment, I’d strongly advise going to the source material, not to BLDGBLOG. But so many metaphors come to mind here—precipitation and snow; depositional 3D printing; shining looms of light, bringing matter into the cosmos.

Imagine an industrial printing facility of the far future whose only input is light. Factories of weird mirrored rooms where objects flash into existence one at a time, in a new manufacturing process extruding matter from illumination.

In any case, I was also reminded of a piece published in Nature back in 2011: “Moving mirrors make light from nothing.”

The hypothesis there was that a single mirror “moving through a vacuum at nearly the speed of light” could, through something called the Casimir force, actually generate photons—the mirror could create light. This was apparently given experimental support when “a shower of microwave photons [was] shaken loose from the vacuum” by a highly sensitive superconducting device known as a SQUID.

The scientist behind that experiment now “hopes to see a moving piece of metal generate detectable light from the vacuum,” as if farming light from nothingness, coaxing photons into appearing like seeds, shaking them loose from the void.

Mirrors moving through darkness at the speed of light can create light—the sheer poetry of this is astonishing to me, like a statement from the Gnostic Gospels.

Anyway, now put these two experiments together: use a moving mirror to pull light from darkness, then collide that light back into itself to generate matter. You could design a kind of internal combustion engine made of moving mirrors, turning darkness into light into matter.

Again, though, read the original articles if you prefer science over speculation.

Instrumental Revelation and the Architecture of Abandoned Physics Experiments

Semi-abandoned large-scale physics experiments have always fascinated me: remote and arcane buildings designed for something other than human spatial expectations, peppered with inexplicable instruments at all scales meant to detect an invisible world that surrounds us, its dimensions otherwise impenetrable to human senses.

[Image: Photo by Yulia Grigoryants, courtesy New York Times.]

Although the experiments he visits in the book are—or, at least, at the time of writing, were—still active, this is partly what made me a fan of Anil Ananthaswamy’s excellent The Edge of Physics: A Journey to Earth’s Extremes to Unlock the Secrets of the Universe, published in 2010. The book is a kind of journalistic pilgrimage to machines buried inside mines, installed atop remote mountain peaks, woven into the ground beneath European cities: sites that are incredibly evocative, religious in their belief that an unseen world is capable of revelation, but scientific in their insistence that this unveiling will be achieved through technological means.

A speculative architectural-literary hybrid I often come back to is Lebbeus Woods’s (graphically uneven but conceptually fascinating) OneFiveFour, which I’ve written about elsewhere. In it, Woods depicts an entire city designed and built as an inhabitable scientific tool. Everywhere there are “oscilloscopes, refractors, seismometers, interferometers, and other, as yet unknown instruments, measuring light, movement, force, change.” Woods describes how “tools for extending perceptivity to all scales of nature are built spontaneously, playfully, experimentally, continuously modified in home laboratories, in laboratories that are homes.”

Instead of wasting their lives tweeting about celebrity deaths, residents construct and model their own bespoke experiments, exploring seismology, astronomy, electricity, even light itself.

In any case, both Ananthaswamy’s and Woods’s books came to mind last week when reading a piece by Dennis Overbye in the New York Times about a still-active but seemingly forgotten observatory on Mt. Aragats in Armenia. There, in “a sprawling array of oddly shaped, empty buildings,” a tiny crew of scientists still works, looking for “cosmic rays: high-energy particles thrown from exploding stars, black holes and other astrophysical calamities thousands or millions of light-years away and whistling down from space.”

In the accompanying photographs, all taken by Yulia Grigoryants, we see black boxes perched atop pillars and ladders, in any other context easy to mistake for an avant-garde sculptural installation but, here, patiently awaiting “cosmic rain.” Grigoryants explores tunnels and abandoned labs, hiking around dead satellite-tracking stations in the snow, sometimes surrounded by stray dogs. Just think of the novels that could be set here.

As Overbye writes, despite advances in the design and construction of particle accelerators, such as CERN—which is, in effect, a giant Lebbeus Woods project in real life—“the buildings and the instruments at Aragats remain, like ghost ships in the cosmic rain, maintained for long stretches of time by a skeleton crew of two technicians and a cook. They still wait for news that could change the universe: a quantum bullet more powerful than humans can produce, or weirder than their tentative laws can explain; trouble blowing in from the sun.”

In fact, recall another recent article, this time in the Los Angeles Times, about a doomed earthquake-prediction experiment that has come to the end of its funding. It was “a network of 115 sensors deployed along the California coast to act as ears capable of picking up these hints [that might imply a coming earthquake], called electromagnetic precursors… They could also provide a key to understanding spooky electric discharges known ‘earthquake lights,’ which some seismologists say can burst out of the ground before and during certain seismic events.”

Like menhirs, these abandoned seismic sensors could now just stand there, silent in the landscape, awaiting a future photographer such as Grigoryants to capture their poetic ruination.

Speaking of which, click through to the New York Times to see her photos in full.

Easy Freeze

[Image: Fortress of Solitude from Superman, via the Superman Wiki].

Writing for Ars Technica, Jennifer Ouellette reports on “an exotic form of ice dubbed ‘ice VII’ that physicists can create in the laboratory.” It is apparently capable of “freezing an entire world within hours.”

Ice VII can only be created under conditions of literally unearthly pressure: its “oxygen atoms are arranged in a cubic shape, something that only occurs at pressures more than 10,000 times that on Earth’s surface. It’s created in the lab by zapping thin samples of water sandwiched between plates with high-intensity shock waves or laser pulses.”

Those “high-intensity shock waves” surge through water at enormous speed, rearranging the atoms in what sounds a bit like the cracking of a whip. Indeed, as one of the scientists who discovered Ice VII explains, the ice “forms in a very unusual way—by popping into existence in tiny clusters of about 100 molecules and then growing extremely fast, at over 1,000 miles per hour.”

Although we are obviously talking about a physical process unattainable outside constrained laboratory conditions, it is nonetheless interesting to imagine this being controlled somehow and used in the wild here on Earth to create, say, instant ice bridges, pop-up hockey rinks, or other architectural spans and structures flash-frozen into existence at 1,000 miles per hour.

Cathedrals made of ice surge up from lakes in the Florida panhandle to the cries of stunned passers-by.

Read more at Ars Technica or Physical Review Letters.

The Coming Amnesia

[Image: Galaxy M101; full image credits].

In a talk delivered in Amsterdam a few years ago, science fiction writer Alastair Reynolds outlined an unnerving future scenario for the universe, something he had also recently used as the premise of a short story (collected here).

As the universe expands over hundreds of billions of years, Reynolds explained, there will be a point, in the very far future, at which all galaxies will be so far apart that they will no longer be visible from one another.

Upon reaching that moment, it will no longer be possible to understand the universe’s history—or perhaps even that it had one—as all evidence of a broader cosmos outside of one’s own galaxy will have forever disappeared. Cosmology itself will be impossible.

In such a radically expanded future universe, Reynolds continued, some of the most basic insights offered by today’s astronomy will be unavailable. After all, he points out, “you can’t measure the redshift of galaxies if you can’t see galaxies. And if you can’t see galaxies, how do you even know that the universe is expanding? How would you ever determine that the universe had had an origin?”

There would be no reason to theorize that other galaxies had ever existed in the first place. The universe, in effect, will have disappeared over its own horizon, into a state of irreversible amnesia.

[Image: The Tarantula Nebula, photographed by the Hubble Space Telescope, via the New York Times].

It was an interesting talk that I had the pleasure to catch in person, and, for those interested, it includes Reynolds’s explanation of how he shaped this idea into a short story.

More to the point, however, Reynolds was originally inspired by an article published in Scientific American back in 2008 called “The End of Cosmology?” by Lawrence M. Krauss and Robert J. Scherrer.

That article’s sub-head suggests what’s at stake: “An accelerating universe,” we read, “wipes out traces of its own origins.”

[Image: A “Wolf–Rayet star… in the constellation of Carina (The Keel),” photographed by the Hubble Space Telescope].

As Krauss and Scherrer point out in their provocative essay, “We may be living in the only epoch in the history of the universe when scientists can achieve an accurate understanding of the true nature of the universe.”

“What will the scientists of the future see as they peer into the skies 100 billion years from now?” they ask. “Without telescopes, they will see pretty much what we see today: the stars of our galaxy… The big difference will occur when these future scientists build telescopes capable of detecting galaxies outside our own. They won’t see any! The nearby galaxies will have merged with the Milky Way to form one large galaxy, and essentially all the other galaxies will be long gone, having escaped beyond the event horizon.”

This won’t only mean fewer luminous objects to see in space; it will mean that, “as a result, Hubble’s crucial discovery of the expanding universe will become irreproducible.”

[Image: The “interacting galaxies” of Arp 273, photographed by the Hubble Space Telescope, via the New York Times].

The authors go on to explain that even the chemical composition of this future universe will no longer allow for its history to be deduced, including the Big Bang.

“Astronomers and physicists who develop an understanding of nuclear physics,” they write, “will correctly conclude that stars burn nuclear fuel. If they then conclude (incorrectly) that all the helium they observe was produced in earlier generations of stars, they will be able to place an upper limit on the age of the universe. These scientists will thus correctly infer that their galactic universe is not eternal but has a finite age. Yet the origin of the matter they observe will remain shrouded in mystery.”

In other words, essentially no observational tool available to future astronomers will lead to an accurate understanding of the universe’s origins. The authors call this an “apocalypse of knowledge.”

[Image: “The Christianized constellation St. Sylvester (a.k.a. Bootes), from the 1627 edition of Schiller’s Coelum Stellatum Christianum.” Image (and caption) from Star Maps: History, Artistry, and Cartography by Nick Kanas].

There are many interesting things here, including the somewhat existentially horrifying possibility that any intelligent creatures alive in that distant era will have no way to know what is happening to them, where things came from, even where they currently are (an empty space? a dream?), or why.

Informed cosmology will, by necessity, be replaced with religious speculation—with myths, poetry, and folklore.

[Image: 12th-century astrolabe; from Star Maps: History, Artistry, and Cartography by Nick Kanas].

It is worth asking, however briefly and with multiple grains of salt, if something similar has perhaps already occurred in the universe we think we know today—if something has not already disappeared beyond the horizon of cosmic amnesia—making even our most well-structured, observation-based theories obsolete. For example, could even the widely accepted conclusion that there was a Big Bang be just an ironic side-effect of having lost some other form of cosmic evidence that long ago slipped eternally away from view?

Remember that these future astronomers will not know anything is missing. They will merrily forge ahead with their own complicated, internally convincing new theories and tests. It is not out of the question, then, to ask if we might be in a similarly ignorant situation.

In any case, what kinds of future devices and instruments might be invented to measure or explore a cosmic scenario such as this? What explanations and narratives would such devices be trying to prove?

[Image: “Woodcut illustration depicting the 7th day of Creation, from a page of the 1493 Latin edition of Schedel’s Nuremberg Chronicle. Note the Aristotelian cosmological system that was used in the Middle Ages, below, with God and His retinue of angels looking down on His creation from above.” Image (and caption) from Star Maps: History, Artistry, and Cartography by Nick Kanas].

Science writer Sarah Scoles looked at this same dilemma last year for PBS, interviewing astronomer Avi Loeb.

Scoles was able to find a small glimmer of light in this infinite future darkness, however: Loeb believes that there might actually be a way out of this universal amnesia.

“The center of our galaxy keeps ejecting stars at high enough speeds that they can exit the galaxy,” Loeb says. The intense and dynamic gravity near the black hole ejects them into space, where they will glide away forever like radiating rocket ships. The same thing should happen a trillion years from now.

“These stars that leave the galaxy will be carried away by the same cosmic acceleration,” Loeb says. Future astronomers can monitor them as they depart. They will see stars leave, become alone in extragalactic space, and begin rushing faster and faster toward nothingness. It would look like magic. But if those future people dig into that strangeness, they will catch a glimpse of the true nature of the universe.

There might yet be hope for cosmological discovery, in the other words, encoded in the trajectories of these bizarre, fleeing stars.

[Images: (top) “An illustration of the Aristotelian/Ptolemaic cosmological system that was used in the Middle Ages, from the 1579 edition of Piccolomini’s De la Sfera del Mondo.” (bottom) “An illustration (influenced by Peurbach’s Theoricae Planetarum Novae) explaining the retrograde motion of an outer planet in the sky, from the 1647 Leiden edition of Sacrobosco’s De Sphaera.” Images and captions from Star Maps: History, Artistry, and Cartography by Nick Kanas].

There are at least two reasons why I have been thinking about this today. One was the publication of an article by Dennis Overbye earlier this week about the rate of the universe’s expansion.

“There is a crisis brewing in the cosmos,” Overbye writes, “or perhaps in the community of cosmologists. The universe seems to be expanding too fast, some astronomers say.”

Indeed, the universe might be more “virulent and controversial” than currently believed, he explains, caught-up in the long process of simply tearing itself apart.

[Image: A “starburst galaxy” photographed by the Hubble Space Telescope].

One implication of this finding, Overbye adds, “is that the most popular version of dark energy—known as the cosmological constant, invented by Einstein 100 years ago and then rejected as a blunder—might have to be replaced in the cosmological model by a more virulent and controversial form known as phantom energy, which could cause the universe to eventually expand so fast that even atoms would be torn apart in a Big Rip billions of years from now.”

In the process, perhaps the far-future dark ages envisioned by Krauss and Scherrer will thus arrive a billion or two years earlier than expected.

[Image: Engraving by Gustave Doré from The Divine Comedy by Dante Alighieri].

The second thing that made me think of this, however, was a short essay called “Dante in Orbit,” originally published in 1963, that a friend sent to me last night. It is about stars, constellations, and the possibility of determining astronomical time in The Divine Comedy.

In that paper, Frederick A. Stebbins writes that Dante “seems far removed from the space age; yet we find him concerned with problems of astronomy that had no practical importance until man went into orbit. He had occasion to deal with local time, elapsed time, and the International Date Line. His solutions appear to be correct.”

Stebbins goes on to describe “numerous astronomical references in [Dante’s] chief work, The Divine Comedy”—albeit doing so in a way that remains unconvincing. He suggests, for example, that Dante’s descriptions of constellations, sunrises, full moons, and more will allow an astute reader to measure exactly how much time was meant to have passed in his mythic story, and even that Dante himself had somehow been aware of differential, or relativistic, time differences between far-flung locations. (Recall, on the other hand, that Dante’s work has been discussed elsewhere for its possible insights into physics.)

[Image: Diagrams from “Dante in Orbit” (1963) by Frederick A. Stebbins].

But what’s interesting about this is not whether or not Stebbins was correct in his conclusions. What’s interesting is the very idea that a medieval cosmology might have been soft-wired, so to speak, into Dante’s poetic universe and that the stars and constellations he referred to would have had clear narrative significance for contemporary readers. It was part of their era’s shared understanding of how the world was structured.

Now, though, imagine some new Dante of a hundred billion years from now—some new Divine Comedy published in a trillion years—and how it might come to grips with the universal isolation and darkness of Krauss and Scherrer. What cycles of time might be perceived in the lonely, shining bulk of the Milky Way, a dying glow with no neighbor; what shared folklore about the growing darkness might be communicated to readers who don’t know, who cannot know, how incorrect their model of the cosmos truly is?

(Thanks to Wayne Chambliss for the Dante paper).

The Physics of Hell

inferno[Image: Dante’s great cyclotron of souls in the Inferno, a different sort of Hadron Collider; engraving by Gustave Doré].

In the context of all this talk about LIGO and gravitational waves, it’s interesting to look back at a 2011 article from the Boston Globe about an unexpected source of inspiration for Galileo Galilei.

“Galileo’s most important ideas might have their roots not in the real world, but in a fictional one,” we read, at least according to an argument “that Mount Holyoke College physics professor Mark Peterson has been developing for the past several years: specifically, that one of Galileo’s crucial contributions to physics came from measuring the hell of Dante’s Inferno. Or rather, from disproving its measurements.”

Ever since its 1314 publication, scholars had toiled to map the physical features of Dante’s Inferno—the blasted valleys and caverns, the roiling rivers of fire. What Galileo said, put simply, is that many commonly accepted dimensions did not stand up to mathematical scrutiny. Using complex geometrical analysis, he attacked a leading scholar’s version of the Inferno’s structure, pointing out that his description of the infernal architecture—such as the massive cylinders descending to the center of the Earth—would, in real life, collapse under their own weight.

Although Galileo himself would apparently soon realize that parts of his own debunking needed further debunking, Peterson points out that, in “applying mathematical models to Dante’s hell, Galileo was laying the groundwork for what would become theoretical physics.”

Peterson’s original 2002 paper on the matter is called “Galileo’s Discovery of Scaling Laws” (PDF).

The details of the Boston Globe article have been picked apart elsewhere, but the accuracy of its various historical claims is not what interests me; what seems worth posting about here, rather, is the wonderfully bizarre possibility that a culture could develop such an intense and otherworldly vision of eternal torture and damnation that it eventually inspires a new branch of physics.

stellar[Image: After Hell, stars; from Dante’s Inferno, engraving by Gustave Doré].

In fact, one could easily imagine the strange molten geologies of such a landscape, this burning wasteland of semi-liquid rock, cut through with irradiated rivers and lakes, its temperatures on par with something more like a nuclear explosion, or perhaps just the electromagnetic atmospherics of a microwave; and one could just as easily imagine the mind-bendingly complex interpretive effort required to deduce actual, mathematically rigorous physical laws from such a nightmarish environment. Imagine scholars of Hell, sitting around immense tables made of black slate, calculating atmospheric pressures and the melting points of whole continents.

The idea, as well, that an entirely secular present-day science might actually have hidden within it a secret historical lineage dating back to descriptive measurements of Hell is, at the very least, a compelling framework for a work of speculative fiction. The mathematics used to describe the insides of stars, for example, actually originating with someone’s thesis on the burning points of angels, or the uncanny gravity of black holes traced back to field equations first written by someone trying to map the unstable angles of cliffs lining the uranium mines of the Inferno.

Of course, all of this could be theologically lightened quite a bit—a new branch of mathematics concerned, instead, with the idyllic meteorology of Paradise—but I guess I’ve always just been more interested in Hell.

Read the original Boston Globe article, as well as its rejoinder.

(Article spotted via @davidbmetcalfe).

A Window “Radically Different From All Previous Windows”

LIGO[Image: The corridors of LIGO, Louisiana, shaped like a “carpenter’s square”; via Google Earth].

It’s been really interesting for the last few weeks to watch as rumors and speculations about the first confirmed detection of gravitational waves have washed over the internet—primarily, at least from my perspective, because my wife, Nicola Twilley, who writes for The New Yorker, has been the only journalist given early access not just to the results but, more importantly, to the scientists behind the experiment, while writing an article that just went live over at The New Yorker.

It has been incredibly exciting to listen-in on partial conversations and snippets of overheard interviews in our home office here, as people like Kip Thorne, Rainer Weiss, and David Reitze, among a dozen others, all explained to her exactly how the gravitational waves were first detected and what it means for our future ability to study and understand the cosmos.

All this gloating as a proud husband aside, however, it’s a truly fascinating story and well worth mentioning here.

LIGO—the Laser Interferometer Gravitational-Wave Observatory—is a virtuoso act of precision construction: a pair of instruments, separated by thousands of miles, used to detect gravitational waves. They are shaped like “carpenter’s squares,” we read, and they stand in surreal, liminal landscapes: surrounded by water-logged swampland in Louisiana and “amid desert sagebrush, tumbleweed, and decommissioned reactors” in Hanford, Washington.

Ligo-Hanford [Image: LIGO, Hanford; via Google Earth].

Each consists of vast, seismically isolated corridors and finely calibrated super-mirrors between which lasers reflect in precise synchrony. These hallways are actually “so long—nearly two and a half miles—that they had to be raised a yard off the ground at each end, to keep them lying flat as Earth curved beneath them.”

To achieve the necessary precision of measurement, [Rainer Weiss, who first proposed the instrument’s construction] suggested using light as a ruler. He imagined putting a laser in the crook of the “L.” It would send a beam down the length of each tube, which a mirror at the other end would reflect back. The speed of light in a vacuum is constant, so as long as the tubes were cleared of air and other particles, the beams would recombine at the crook in synchrony—unless a gravitational wave happened to pass through. In that case, the distance between the mirrors and the laser would change slightly. Since one beam was now covering a shorter distance than its twin, they would no longer be in lockstep by the time they got back. The greater the mismatch, the stronger the wave. Such an instrument would need to be thousands of times more sensitive than any before it, and it would require delicate tuning, in order to extract a signal of vanishing weakness from the planet’s omnipresent din.

LIGO is the most sensitive instrument ever created by human beings, and its near-magical ability to pick up the tiniest tremor in the fabric of spacetime lends it a fantastical air that began to invade the team’s sleep. As Frederick Raab, director of the Hanford instrument, told Nicola, “When these people wake up in the middle of the night dreaming, they’re dreaming about the detector.”

Because of this hyper-sensitivity, its results need to be corrected against everything from minor earthquakes, windstorms, and passing truck traffic to “fluctuations in the power grid,” “distant lightning storms,” and even the howls of prowling wolves.

When the first positive signal came through, the team was actually worried it might not be a gravitational wave at all but “a very large lightning strike in Africa at about the same time.” (They checked; it wasn’t.)

Newton[Image: “Newton” (1795-c.1805) by William Blake, courtesy of the Tate].

The big deal amidst all this is that being able to study gravitational waves is very roughly analogous to the discovery of radio astronomy—where gravitational wave astronomy has the added benefit of opening up an entirely new spectrum of observation. Gravitational waves will let us “see” the fabric of spacetime in a way broadly similar to how we can “see” otherwise invisible radio emissions in deep space.

From The New Yorker:

Virtually all that is known about the universe has come to scientists by way of the electromagnetic spectrum. Four hundred years ago, Galileo began exploring the realm of visible light with his telescope. Since then, astronomers have pushed their instruments further. They have learned to see in radio waves and microwaves, in infrared and ultraviolet, in X-rays and gamma rays, revealing the birth of stars in the Carina Nebula and the eruption of geysers on Saturn’s eighth moon, pinpointing the center of the Milky Way and the locations of Earth-like planets around us. But more than ninety-five per cent of the universe remains imperceptible to traditional astronomy… “This is a completely new kind of telescope,” [David] Reitze said. “And that means we have an entirely new kind of astronomy to explore.”

Interestingly, in fact, my “seeing” metaphor, above, is misguided. As it happens, the gravitational waves studied by LIGO in its current state—ever-larger and more powerful new versions of the instrument are already being planned—“fall within the range of human hearing.”

If you want to hear spacetime, there is an embedded media player over at The New Yorker with a processed snippet of the “chirp” made by the incoming gravitational wave.

In any case, I’ve already gone on at great length, but the article ends with a truly fantastic quote from Kip Thorne. Thorne, of course, achieved minor celebrity last year when he consulted on the physics for Christopher Nolan’s relativistic time-travel film Interstellar, and he is not lacking for imagination.

Thorne compares LIGO to a window (and my inner H.P. Lovecraft reader shuddered at the ensuing metaphor):

“We are opening up a window on the universe so radically different from all previous windows that we are pretty ignorant about what’s going to come through,” Thorne said. “There are just bound to be big surprises.”

Go read the article in full!

Islands at the Speed of Light

A recent paper published in the Physical Review has some astonishing suggestions for the geographic future of financial markets. Its authors, Alexander Wissner-Gross and Cameron Freer, discuss the spatial implications of speed-of-light trading.

Trades now occur so rapidly, they explain, and in such fantastic quantity, that the speed of light itself presents limits to the efficiency of global computerized trading networks.

These limits are described as “light propagation delays.”

[Image: Global map of “optimal intermediate locations between trading centers,” based on the earth’s geometry and the speed of light, by Alexander Wissner-Gross and Cameron Freer].

It is thus in traders’ direct financial interest, they suggest, to install themselves at specific points on the Earth’s surface—a kind of light-speed financial acupuncture—to take advantage both of the planet’s geometry and of the networks along which trades are ordered and filled. They conclude that “the construction of relativistic statistical arbitrage trading nodes across the Earth’s surface” is thus economically justified, if not required.

Amazingly, their analysis—seen in the map, above—suggests that many of these financially strategic points are actually out in the middle of nowhere: hundreds of miles offshore in the Indian Ocean, for instance, on the shores of Antarctica, and scattered throughout the South Pacific (though, of course, most of Europe, Japan, and the U.S. Bos-Wash corridor also make the cut).

These nodes exist in what the authors refer to as “the past light cones” of distant trading centers—thus the paper’s multiple references to relativity. Astonishingly, this thus seems to elide financial trading networks with the laws of physics, implying the eventual emergence of what we might call quantum financial products. Quantum derivatives! (This also seems to push us ever closer to the artificially intelligent financial instruments described in Charles Stross’s novel Accelerando). Erwin Schrödinger meets the Dow.

It’s financial science fiction: when the dollar value of a given product depends on its position in a planet’s light-cone.

[Image: Diagrammatic explanation of a “light cone,” courtesy of Wikipedia].

These points scattered along the earth’s surface are described as “optimal intermediate locations between trading centers,” each site “maximiz[ing] profit potential in a locally auditable manner.”

Wissner-Gross and Freer then suggest that trading centers themselves could be moved to these nodal points: “we show that if such intermediate coordination nodes are themselves promoted to trading centers that can utilize local information, a novel econophysical effect arises wherein the propagation of security pricing information through a chain of such nodes is effectively slowed or stopped.” An econophysical effect.

In the end, then, they more or less explicitly argue for the economic viability of building artificial islands and inhabitable seasteads—i.e. the “construction of relativistic statistical arbitrage trading nodes”—out in the middle of the ocean somewhere as a way to profit from speed-of-light trades. Imagine, for a moment, the New York Stock Exchange moving out into the mid-Atlantic, somewhere near the Azores, onto a series of New Babylon-like platforms, run not by human traders but by Watson-esque artificially intelligent supercomputers housed in waterproof tombs, all calculating money at the speed of light.

[Image: An otherwise unrelated image from NOAA featuring a geodetic satellite triangulation network].

“In summary,” the authors write, “we have demonstrated that light propagation delays present new opportunities for statistical arbitrage at the planetary scale, and have calculated a representative map of locations from which to coordinate such relativistic statistical arbitrage among the world’s major securities exchanges. We furthermore have shown that for chains of trading centers along geodesics, the propagation of tradable information is effectively slowed or stopped by such arbitrage.”

Historically, technologies for transportation and communication have resulted in the consolidation of financial markets. For example, in the nineteenth century, more than 200 stock exchanges were formed in the United States, but most were eliminated as the telegraph spread. The growth of electronic markets has led to further consolidation in recent years. Although there are advantages to centralization for many types of transactions, we have described a type of arbitrage that is just beginning to become relevant, and for which the trend is, surprisingly, in the direction of decentralization. In fact, our calculations suggest that this type of arbitrage may already be technologically feasible for the most distant pairs of exchanges, and may soon be feasible at the fastest relevant time scales for closer pairs.

Our results are both scientifically relevant because they identify an econo-physical mechanism by which the propagation of tradable information can be slowed or stopped, and technologically significant, because they motivate the construction of relativistic statistical arbitrage trading nodes across the Earth’s surface.

For more, read the original paper: PDF.

(Thanks to Nicola Twilley for the tip!)

Without Walls: An Interview with Lebbeus Woods

[Image: Lebbeus Woods, Lower Manhattan, 1999; view larger].

Lebbeus Woods is one of the first architects I knew by name – not Frank Lloyd Wright or Mies van der Rohe, but Lebbeus Woods – and it was Woods’s own technically baroque sketches and models, of buildings that could very well be machines (and vice versa), that gave me an early glimpse of what architecture could really be about.

Woods’s work is the exclamation point at the end of a sentence proclaiming that the architectural imagination, freed from constraints of finance and buildability, should be uncompromising, always. One should imagine entirely new structures, spaces without walls, radically reconstructing the outermost possibilities of the built environment.

If need be, we should re-think the very planet we stand on.

[Image: Lebbeus Woods, Havana, radically reconstructed, 1994].

Of course, Woods is usually considered the avant-garde of the avant-garde, someone for whom architecture and science fiction – or urban planning and exhilarating, uncontained speculation – are all but one and the same. His work is experimental architecture in its most powerful, and politically provocative, sense.

Genres cross; fiction becomes reflection; archaeology becomes an unpredictable form of projective technology; and even the Earth itself gains an air of the non-terrestrial.

[Image: Lebbeus Woods, DMZ, 1988].

One project by Woods, in particular, captured my imagination – and, to this day, it just floors me. I love this thing. In 1980, Woods proposed a tomb for Albert Einstein – the so-called Einstein Tomb (collected here) – inspired by Boullée’s famous Cenotaph for Newton.

But Woods’s proposal wasn’t some paltry gravestone or intricate mausoleum in hewn granite: it was an asymmetrical space station traveling on the gravitational warp and weft of infinite emptiness, passing through clouds of mutational radiation, riding electromagnetic currents into the void.

The Einstein Tomb struck me as such an ingenious solution to an otherwise unremarkable problem – how to build a tomb for an historically titanic mathematician and physicist – that I’ve known who Lebbeus Woods is ever since.

[Images: Lebbeus Woods, the city and the faults it sits on, from the San Francisco Bay Project, 1995].

So when the opportunity came to talk to Lebbeus about one image that he produced nearly a decade ago, I continued with the questions; the result is this interview, which happily coincides with the launch of Lebbeus’s own website – his first – at lebbeuswoods.net. That site contains projects, writings, studio reports, and some external links, and it’s worth bookmarking for later exploration.

[Image: Lebbeus Woods, Havana, 1994; view larger].

In the following Q&A, then, Woods talks to BLDGBLOG about the geology of Manhattan; the reconstruction of urban warzones; politics, walls, and cooperative building projects in the future-perfect tense; and the networked forces of his most recent installations.


• • •

BLDGBLOG: First, could you explain the origins of the Lower Manhattan image?

Lebbeus Woods: This was one of those occasions when I got a request from a magazine – which is very rare. In 1999, Abitare was making a special issue on New York City, and they invited a number of architects – like Steven Holl, Rafael Viñoly, and, oh god, I don’t recall. Todd Williams and Billie Tsien. Michael Sorkin. Myself. They invited us to make some sort of comment about New York. So I wrote a piece – probably 1000 words, 800 words – and I made the drawing.

I think the main thought I had, in speculating on the future of New York, was that, in the past, a lot of discussions had been about New York being the biggest, the greatest, the best – but that all had to do with the size of the city. You know, the size of the skyscrapers, the size of the culture, the population. So I commented in the article about Le Corbusier’s infamous remark that your skyscrapers are too small. Of course, New York dwellers thought he meant, oh, they’re not tall enough – but what he was referring to was that they were too small in their ground plan. His idea of the Radiant City and the Ideal City – this was in the early 30s – was based on very large footprints of buildings, separated by great distances, and, in between the buildings in his vision, were forests, parks, and so forth. But in New York everything was cramped together because the buildings occupied such a limited ground area. So Le Corbusier was totally misunderstood by New Yorkers who thought, oh, our buildings aren’t tall enough – we’ve got to go higher! Of course, he wasn’t interested at all in their height – more in their plan relationship. Remember, he’s the guy who said, the plan is the generator.

So I was speculating on the future of the city and I said, well, obviously, compared to present and future cities, New York is not going to be able to compete in terms of size anymore. It used to be a large city, but now it’s a small city compared with São Paulo, Mexico City, Kuala Lumpur, or almost any Asian city of any size. So I said maybe New York can establish a new kind of scale – and the scale I was interested in was the scale of the city to the Earth, to the planet. I made the drawing as a demonstration of the fact that Manhattan exists, with its towers and skyscrapers, because it sits on a rock – on a granite base. You can put all this weight in a very small area because Manhattan sits on the Earth. Let’s not forget that buildings sit on the Earth.

I wanted to suggest that maybe lower Manhattan – not lower downtown, but lower in the sense of below the city – could form a new relationship with the planet. So, in the drawing, you see that the East River and the Hudson are both dammed. They’re purposefully drained, as it were. The underground – or lower Manhattan – is revealed, and, in the drawing, there are suggestions of inhabitation in that lower region.

[Image: Lebbeus Woods, Lower Manhattan, 1999, in case you missed it; view larger].

So it was a romantic idea – and the drawing is very conceptual in that sense.

But the exposure of the rock base, or the underground condition of the city, completely changes the scale relationship between the city and its environment. It’s peeling back the surface to see what the planetary reality is. And the new scale relationship is not about huge blockbuster buildings; it’s not about towers and skyscrapers. It’s about the relationship of the relatively small human scratchings on the surface of the earth compared to the earth itself. I think that comes across in the drawing. It’s not geologically correct, I’m sure, but the idea is there.

There are a couple of other interesting features which I’ll just mention. One is that the only bridge I show is the Brooklyn Bridge. I don’t show the Brooklyn-Battery Tunnel, for instance. That’s just gone. And I don’t show the Manhattan Bridge or the Williamsburg Bridge, which are the other two bridges on the East River. On the Hudson side, it was interesting, because I looked carefully at the drawings – which I based on an aerial photograph of Manhattan, obviously – and the World Trade Center… something’s going on there. Of course, this was in 1999, and I’m not a prophet and I don’t think that I have any particular telepathic or clairvoyant abilities [laughs], but obviously the World Trade Center has been somehow diminished, and there are things floating in the Hudson next to it. I’m not sure exactly what I had in mind – it was already several years ago – except that some kind of transformation was going to happen there.

BLDGBLOG: That’s actually one of the things I like so much about your work: you re-imagine cities and buildings and whole landscapes as if they have undergone some sort of potentially catastrophic transformation – be it a war or an earthquake, etc. – but you don’t respond to those transformations by designing, say, new prefab refugee shelters or more durable tents. You respond with what I’ll call science fiction: a completely new order of things – a new way of organizing and thinking about space. You posit something radically different than what was there before. It’s exciting.

Woods: Well, I think that, for instance, in Sarajevo, I was trying to speculate on how the war could be turned around, into something that people could build the new Sarajevo on. It wasn’t about cleaning up the mess or fixing up the damage; it was more about a transformation in the society and the politics and the economics through architecture. I mean, it was a scenario – and, I suppose, that was the kind of movie aspect to it. It was a “what if?”

I think there’s not enough of that thinking today in relation to cities that have been faced with sudden and dramatic – even violent – transformations, either because of natural or human causes. But we need to be able to speculate, to create these scenarios, and to be useful in a discussion about the next move. No one expects these ideas to be easily implemented. It’s not like a practical plan that you should run out and do. But, certainly, the new scenario gives you a chance to investigate a direction. Of course, being an architect, I’m very interested in the specifics of that direction – you know, not just a verbal description but: this is what it might look like.

So that was the approach in Sarajevo – as well as in this drawing of Lower Manhattan, as I called it.

[Images: Lebbeus Woods. Future structures of the Korean demilitarized zone (1988) juxtaposed with two views of the architectonic tip of some vast flooded machine-building, from Icebergs (1991)].

BLDGBLOG: Part of that comes from recognizing architecture as its own kind of genre. In other words, architecture has the ability, rivaling literature, to imagine and propose new, alternative routes out of the present moment. So architecture isn’t just buildings, it’s a system of entirely re-imagining the world through new plans and scenarios.

Woods: Well, let me just back up and say that architecture is a multi-disciplinary field, by definition. But, as a multi-disciplinary field, our ideas have to be comprehensive; we can’t just say: “I’ve got a new type of column that I think will be great for the future of architecture.”

BLDGBLOG: [laughs]

Woods: Maybe it will be great – but it’s not enough. I think architects – at least those inclined to understand the multi-disciplinarity and the comprehensive nature of their field – have to visualize something that embraces all these political, economic, and social changes. As well as the technological. As well as the spatial.

But we’re living in a very odd time for the field. There’s a kind of lack of discourse about these larger issues. People are hunkered down, looking for jobs, trying to get a building. It’s a low point. I don’t think it will stay that way. I don’t think that architects themselves will allow that. After all, it’s architects who create the field of architecture; it’s not society, it’s not clients, it’s not governments. I mean, we architects are the ones who define what the field is about, right?

So if there’s a dearth of that kind of thinking at the moment, it’s because architects have retreated – and I’m sure a coming generation is going to say: hey, this retreat is not good. We’ve got to imagine more broadly. We have to have a more comprehensive vision of what the future is.

[Images: Lebbeus Woods, The Wall Game].

BLDGBLOG: In your own work – and I’m thinking here of the Korean DMZ project or the Israeli wall-game – this “more comprehensive vision” of the future also involves rethinking political structures. Engaging in society not just spatially, but politically. Many of the buildings that you’ve proposed are more than just buildings, in other words; they’re actually new forms of political organization.

Woods: Yeah. I mean, obviously, the making of buildings is a huge investment of resources of various kinds. Financial, as well as material, and intellectual, and emotional resources of a whole group of people get involved in a particular building project. And any time you get a group, you’re talking about politics. To me politics means one thing: How do you change your situation? What is the mechanism by which you change your life? That’s politics. That’s the political question. It’s about negotiation, or it’s about revolution, or it’s about terrorism, or it’s about careful step-by-step planning – all of this is political in nature. It’s about how people, when they get together, agree to change their situation.

As I wrote some years back, architecture is a political act, by nature. It has to do with the relationships between people and how they decide to change their conditions of living. And architecture is a prime instrument of making that change – because it has to do with building the environment they live in, and the relationships that exist in that environment.

[Image: Lebbeus Woods, Siteline Vienna, 1998].

BLDGBLOG: There’s also the incredibly interesting possibility that a building project, once complete, will actually change the society that built it. It’s the idea that a building – a work of architecture – could directly catalyze a transformation, so that the society that finishes building something is not the same society that set out to build it in the first place. The building changes them.

Woods: I love that. I love the way you put it, and I totally agree with it. I think, you know, architecture should not just be something that follows up on events but be a leader of events. That’s what you’re saying: That by implementing an architectural action, you actually are making a transformation in the social fabric and in the political fabric. Architecture becomes an instigator; it becomes an initiator.

That, of course, is what I’ve always promoted – but it’s the most difficult thing for people to do. Architects say: well, it’s my client, they won’t let me do this. Or: I have to do what my client wants. That’s why I don’t have any clients! [laughter] It’s true.

Because at least I can put the ideas out there and somehow it might seep through, or filter through, to another level.

[Images: Lebbeus Woods, Nine Reconstructed Boxes].

BLDGBLOG: Finally, it seems like a lot of the work you’ve been doing for the past few years – in Vienna, especially – has been a kind of architecture without walls. It’s almost pure space. In other words, instead of walls and floors and recognizable structures, you’ve been producing networks and forces and tangles and clusters – an abstract space of energy and directions. Is that an accurate way of looking at your recent work – and, if so, is this a purely aesthetic exploration, or is this architecture without walls meant to symbolize or communicate a larger political message?

Woods: Well, look – if you go back through my projects over the years, probably the least present aspect is the idea of property lines. There are certainly boundaries – spatial boundaries – because, without them, you can’t create space. But the idea of fencing off, or of compartmentalizing – or the capitalist ideal of private property – has been absent from my work over the last few years.

[Image: Lebbeus Woods. A drawing of tectonic faults and other subsurface tensions, from his San Francisco Bay Project, 1995].

I think in my more recent work, certainly, there are still boundaries. There are still edges. But they are much more porous, and the property lines… [laughs] are even less, should we say, defined or desired.

So the more recent work – like in Vienna, as you mentioned – is harder for people to grasp. Back in the early 90s I was confronting particular situations, and I was doing it in a kind of scenario way. I made realistic-looking drawings of places – of situations – but now I’ve moved into a purely architectonic mode. I think people probably scratch their heads a little bit and say: well, what is this? But I’m glad you grasp it – and I hope my comments clarify at least my aspirations.

Probably the political implication of that is something about being open – encouraging what I call the lateral movement and not the vertical movement of politics. It’s the definition of a space through a set of approximations or a set of vibrations or a set of energy fluctuations – and that has everything to do with living in the present.

All of those lines are in flux. They’re in movement, as we ourselves develop and change.

[Images: Lebbeus Woods, System Wien, 2005].


• • •

BLDGBLOG owes a huge thanks to Lebbeus Woods, not only for having this conversation but for proving over and over again that architecture can and should always be a form of radical reconstruction, unafraid to take on buildings, cities, worlds – whole planets.

For more images, meanwhile, including much larger versions of all the ones that appear here, don’t miss BLDGBLOG’s Lebbeus Woods Flickr set. Also consider stopping by Subtopia for an enthusiastic recap of Lebbeus’s appearance at Postopolis! last Spring; and by City of Sound for Dan Hill’s synopsis of the same event.