Brian Micklethwait's Blog
In which I continue to seek part time employment as the ruler of the world.Home
Tatyana on English is weird
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Category archive: Science
Another French picture, but this time taken in Paris, by my friend Antoine Clarke (to whom thanks):
That would be La Defense, unless I am much mistaken, that being Paris’s new Big Thing district.
I cropped that photo slightly, to moderate that leaning-inwards effect you get when you point a camera upwards at tall buildings.
The email that brought the above snap to my desk, earlier this month, was entitled “warmer than when you were here last”. When I last visited Paris, it was indeed very, very cold, so cold that water features became ice features (see the first picture there).
Today, Antoine sent me another photo, also suffering somewhat from leaning-inwards syndrome, and also cropped by me, more than somewhat. See right.
Mostly what I think about Antoine’s most recent picture is: What an amazing crane! So very tall, and so very thin. It’s amazing it even stays up, let alone manages to accomplish anything. I don’t remember cranes like that existing a generation ago, but maybe that’s merely because no towers that high were being built in London. Not that Antoine’s crane is in London. It is somewhere in America, but where, I do not know.
I just did a bit of googling for books about cranes, and if my googling is anything to go by, books about construction cranes and their history are a lot thinner on the ground than are construction cranes. When you consider how many tons of books have been written about the buildings that construction cranes construct, it is surprising that so little is written about the mighty machines without which such construction would be impossible.
It reminds me of the analogous profusion of books on the history of science, and the comparative neglect of the history of scientific instruments.
As I think I have written before, one major defect of my blog-posting software is that I do not get an accurate picture of how the final blog posting will look, and in this case, whether there is enough verbiage on the left hand side of this tall thin picture of a tall thin crane, to prevent the picture of the tall thin crane impinging upon the posting below. Hence this somewhat verbose and superfluous paragraph, which may not even have been necessary, but I can’t now tell.
I am in the habit of denouncing the notion that science is a precondition for technology (and therefore needs to be paid for by the government). The tendency is for technological gadgetry to lead science, and often to correct science, by defying it and proving with its success that the relevant science needs to be redone.
But there is another even more direct way in which technology leads science. Here is yet another excerpt from Steven Johnson’s The Invention of Air (pp. 73-77). Click on the illustration, which I found here and which is the illustration in the book at that point in the text, to get it properly visible:
The study of air itself had only begun to blossom as a science in the past century, with Robert Boyle’s work on the compression and expansion of air in the late 1600s, and Black’s more recent work on carbon dioxide. Before Boyle and Black, there was little reason to think there was anything to investigate: the world was filled with stuff – people, animals, planets, sprigs of mint – and then there was the nothingness between all the stuff. Why would you study nothingness when there was such a vast supply of stuff to explain? There wasn’t a problem in the nothingness that needed explaining. A cycle of negative reinforcement arose: the lack of a clear problem kept the questions at bay, and the lack of questions left the problems as invisible as the air itself. As Priestley once wrote of Newton, “[he] had very little knowledge of air, so he had few doubts concerning it.”
So the question is: Where did the doubts come from? Why did the problem of air become visible at that specific point in time? Why were Priestley, Boyle, and Black able to see the question clearly enough to begin trying to answer it? There were 800 million human beings on the planet in 1770, every single one of them utterly dependent on air. Why Priestley, Boyle, and Black over everyone else?
One way to answer that question is through the lens of technological history. They were able to explore the problem because they had new tools. The air pumps designed by Otto von Guericke and Boyle (the latter in collaboration with his assistant, Robert Hooke, in the mid-1600s) were as essential to Priestley’s lab in Leeds as the electrical machines had been to his Warrington investigations. It was almost impossible to do experiments without being able to move air around in a controlled manner, just as it was impossible to explore electricity without a reliable means of generating it.
In a way, the air pump had enabled the entire field of pneumatic chemistry in the seventeenth century by showing, indirectly, that there was something to study in the first place. If air was simply the empty space between things, what was there to investigate? But the air pump allowed you to remove all the air from a confined space, and thus create a vacuum, which behaved markedly differently from common air, even though air and absence of air were visually indistinguishable. Bells wouldn’t ring in a vacuum, and candles were extinguished. Von Guericke discovered that a metal sphere composed of two parts would seal tightly shut if you evacuated the air between them. Thus the air pump not only helped justify the study of air itself, but also enabled one of the great spectacles of early Enlightenment science.
The following engraving shows the legendary demonstration of the Magdeburg Sphere, which von Guericke presented before Ferdinand III to much amazement: two eight-horse teams attempt – and, spectacularly, fail – to separate the two hemispheres that have been sealed together by the force of a vacuum.
When we think of technological advances powering scientific discovery, the image that conventionally comes to mind is a specifically visual one: tools that expand the range of our vision, that let us literally see the object of study with new clarity, or peer into new levels of the very distant, the very small. Think of the impact that the telescope had on early physics, or the microscope on bacteriology. But new ways of seeing are not always crucial to discovery. The air pump didn’t allow you to see the vacuum, because of course there was nothing to see; but it did allow you to see it indirectly in the force that held the Magdeburg Sphere together despite all that horsepower. Priestley was two centuries too early to see the molecules bouncing off one another in his beer glasses. But he had another, equally important, technological breakthrough at his disposal: he could measure those molecules, or at least the gas they collectively formed. He had thermometers that could register changes in temperature (plus, crucially, a standard unit for describing those changes). And he had scales for measuring changes in weight that were a thousand times more accurate than the scales da Vinci built three centuries earlier.
This is a standard pattern in the history of science: when tools for measuring increase their precision by orders of magnitude, new paradigms often emerge, because the newfound accuracy reveals anomalies that had gone undetected. One of the crucial benefits of increasing the accuracy of scales is that it suddenly became possible to measure things that had almost no weight. Black’s discovery of fixed air, and its perplexing mixture with common air, would have been impossible without the state-of-the-art scales he employed in his experiments. The whole inquiry had begun when Black heated a quantity of “magnesia alba,” and discovered that it lost a minuscule amount of weight in the process - a difference that would have been imperceptible using older scales. The shift in weight suggested that something was escaping from the magnesia into the air. By then running comparable experiments, heating a wide array of substances, Black was able to accurately determine the weight of carbon dioxide, and consequently prove the existence of the gas. It weighs, therefore it is.
With the university system languishing amid archaic traditions, and corporate R&D labs still on the distant horizon, the public space of the coffeehouse served as the central hub of innovation in British society How much of the Enlightenment do we owe to coffee? Most of the epic developments in England between 1650 and 1800 that still warrant a mention in the history textbooks have a coffeehouse lurking at some crucial juncture in their story. The restoration of Charles II, Newton’s theory of gravity, the South Sea Bubble – they all came about, in part, because England had developed a taste for coffee, and a fondness for the kind of informal networking and shoptalk that the coffeehouse enabled. Lloyd’s of London was once just Edward Lloyd’s coffeehouse, until the shipowners and merchants started clustering there, and collectively invented the modem insurance company. You can’t underestimate the impact that the Club of Honest Whigs had on Priestley’s subsequent streak, precisely because he was able to plug in to an existing network of relationships and collaborations that the coffeehouse environment facilitated. Not just because there were learned men of science sitting around the table – more formal institutions like the Royal Society supplied comparable gatherings – but also because the coffeehouse culture was cross-disciplinary by nature, the conversations freely roaming from electricity, to the abuses of Parliament, to the fate of dissenting churches.
The rise of coffeehouse culture influenced more than just the information networks of the Enlightenment; it also transformed the neurochemical networks in the brains of all those newfound coffee-drinkers. Coffee is a stimulant that has been clinically proven to improve cognitive function - particularly for memory-related tasks - during the first cup or two. Increase the amount of “smart” drugs flowing through individual brains, and the collective intelligence of the culture will become smarter, if enough people get hooked. Create enough caffeine-abusers in your society and you’ll be statistically more likely to launch an Age of Reason. That may itself sound like the self-justifying fantasy of a longtime coffee-drinker, but to connect coffee plausibly to the Age of Enlightenment you have to consider the context of recreational drug abuse in seventeenth-century Europe. Coffee-drinkers are not necessarily smarter; in the long run, than those who abstain from caffeine. (Even if they are smarter for that first cup.) But when coffee originally arrived as a mass phenomenon in the mid-1600s, it was not seducing a culture of perfect sobriety. It was replacing alcohol as the daytime drug of choice. The historian Tom Standage writes in his ingenious A History of the World in Six Glasses:
The impact of the introduction of coffee into Europe during the seventeenth century was particularly noticeable since the most common beverages of the time, even at breakfast, were weak “small beer” and wine .... Those who drank coffee instead of alcohol began the day alert and stimulated, rather than relaxed and mildly inebriated, and the quality and quantity of their work improved .... Western Europe began to emerge from an alcoholic haze that had lasted for centuries.
Emerging from that centuries-long bender, armed with a belief in the scientific method and the conviction, inherited from Newtonian physics, that simple laws could be unearthed beneath complex behavior, the networked, caffeinated minds of the eighteenth century found themselves in a universe that was ripe for discovery. The everyday world was teeming with mysterious phenomena – animals, plants, rocks, weather – that had never before been probed with the conceptual tools of the scientific method. This sense of terra incognita also helps explain why Priestley could be so innovative in so many different disciplines, and why Enlightenment culture in general spawned so many distinct paradigm shifts. Amateur dabblers could make transformative scientific discoveries because the history of each field was an embarrassing lineage of conjecture and superstition. Every discipline was suddenly new again.
I am reading Steven Johnson’s book, The Invention of Air, which is about the life and career of Joseph Priestley.
Early on (pp. 10-12) there is a delightful bit concerning Benjamin Franklin, and his early investigations into the Gulf Stream:
In 1769, the Customs Board in Boston made a formal complaint to the British Treasury about the speed of letters arriving from England. (Indeed, regular transatlantic correspondents had long noticed that letters posted from America to Europe tended to arrive more promptly than letters sent the other direction.) As luck would have it, the deputy postmaster general for North America was in London when the complaint arrived - and so the British authorities brought the issue to his attention, in the hope that he might have an explanation for the lag. They were lucky in another respect: the postmaster in question happened to be Benjamin Franklin.
Franklin would ultimately turn that postal mystery into one of the great scientific breakthroughs of his career: a turning point in our visualization of the macro patterns formed by ocean currents. Franklin was well prepared for the task. As a twenty-year-old, traveling back from his first voyage to London in 1726, he had recorded notes in his journal about the strange prevalence of “gulph weed” in the waters of the North Atlantic. In a letter written twenty years later he had remarked on the slower passage westward across the Atlantic, though at the time he supposed it was attributable to the rotation of the Earth. In a 1762 letter he alluded to the way “the waters mov’d away from the North American Coast towards the coasts of Spain and Africa, whence they get again into the Power of the Trade Winds, and continue the Circulation.” He called that flow the “gulph stream.”
When the British Treasury came to him with the complaint about the unreliable mail delivery schedules, Franklin was quick to suspect that the “gulph stream” would prove to be the culprit. He consulted with a seasoned New England mariner, Timothy Folger, and together they prepared a map of the Gulf Stream’s entire path, hoping that “such Chart and directions may be of use to our Packets in Shortning their Voyages.” The Folger/Franklin map ...
… was the first known chart to show the full trajectory of the Gulf Stream across the Atlantic. But the map was based on anecdotal evidence, mostly drawn from the experience of New England-based whalers. And so in his voyage from England back to America in 1775, Franklin took detailed measurements of water temperatures along the way, and detected a wide but shallow river of warm water, often carrying those telltale weeds from tropical regions. “I find that it is always warmer than the sea on each side of it, and that it does not sparkle in the night,” he wrote. In 1785, at the ripe old age of seventy-nine, he sent a long paper that included his data and the Iolger map to the French scientist Alphonsus le Roy. Franklin’s paper on “sundry Maritime Observations,” as he modestly called it, delivered the first empirical proof of the Gulf Stream’s existence.
I added that map in the middle of that quote, which I found here. (I love the internet.)
Until now, I knew nothing of this Gulf Stream story. The reason I knew nothing of this Gulf Stream story is that I know very little about eighteenth century history of any sort. This book by Johnson looks like it will be a pain-free way to start correcting that.
Six years ago I submitted a paper for a panel, “On the Absence of Absences” that was to be part of an academic conference later that year - in August 2010. Then, and now, I had no idea what the phrase “absence of absences” meant. The description provided by the panel organizers, printed below, did not help. The summary, or abstract of the proposed paper - was pure gibberish, as you can see below. I tried, as best I could within the limits of my own vocabulary, to write something that had many big words but which made no sense whatsoever. I not only wanted to see if I could fool the panel organizers and get my paper accepted, I also wanted to pull the curtain on the absurd pretentions of some segments of academic life. To my astonishment, the two panel organizers - both American sociologists - accepted my proposal and invited me to join them at the annual international conference of the Society for Social Studies of Science to be held that year in Tokyo.
I wonder what Hemingway would have made of “On the Absence of Absences”. (Hemingway, for those not inclined to follow links, is a programme to make your writing clearer.)
Presumably someone has also written a program which churns out this kind of drivel automatically. Google google.
The creators of the automatic nonsense generator, Jeremy Stribling, Dan Aguayo and Maxwell Krohn, have made the SCIgen program free to download. And scientists have been using it in their droves.
At the moment, this sort of drivel just marches on. This is because people who oppose the drivel have to convince the drivellers to stop, which is hard. And, being opposed to drivel, they usually have better things to do with their time. The trick is somehow to reverse the burden of proof, to put the drivellers in the position, en masse, of having to convince the rest of us that their drivel is not drivel. At that point, they find that they have no friends, only public contempt. Everybody, including them, thinks that it is drivel. And nobody thinks it worth bothering to even try to prove otherwise.
3D printing is not the replacement of factories by homes. It is manufacturing in factories only more so. Making stuff is not, as of now, getting less skilled. It is getting more skilled ...:
Most ceramic 3D printing uses complex techniques to deposit layers of the material on top of each other, and as a result have to use materials with relatively low melting points. The techniques can also only be used to create fairly simple shapes.
But a team from HRL Laboratories in Malibu, California, has developed what they call a pre-ceramic resin, which they can 3D print much like regular polymers into complex shapes. The process, known as stereolithography, fuses a powder of silicon carbide ceramics using UV light. Once the basic shape is printed, it can be heat-treated at 1,800°F to turn the pre-ceramic resin into a regular ceramic object. In fact, this is the first time silicon carbide ceramics have ever been 3D printed.
… which is very good news for the rich world economies.
Says a commenter:
So 2016 opens with YAAI3DP (Yet Another Advance In 3D Printing.) and some point all these breakthroughs are going to add up and utterly transform manufacturing.
The way he then goes on to say that it will transform manufacturing is that we may eventually get stuff made whenever and wherever we want it made. In homes and shopping malls, in other words. Maybe eventually. In the meantime, cleverer stuff is getting made in the same old places, and then transported to where it is needed.
When I transport blogged, one of the constant themes I found myself noticing was how people regularly thought that transport would be done away with, but it never was. The main notion was that people would communicate so well that they’d never want to meet face-to-face. Now, it is being speculated that stuff will be made so cleverly that it will be makable anywhere. Maybe so, but that isn’t now the smart way to do it, and it probably never will be.
From Rob Fisher, who knows my interest in 3D printing, incoming email entitled:
It’s no longer a rare feat to 3D print blood vessels. Printing vessels that act like the real deal, however, has been tricky… until now. Lawrence Livermore researchers have successfully 3D printed blood vessels that deliver nutrients and self-assemble like they would in a human body. The key is to print an initial structure out of cells and other organic material, and then to augment it with bio ink and other body-friendly materials. With enough time, everything joins up and behaves naturally.
Right now, the actual structures don’t bear much resemblance to what you’d find in a person - you get a “spaghetti bowl” of vessels. Scientists hope to organize these vessels the way they exist in nature, though. If that happens, you could one day see artificial tissue samples and even transplants that are about as realistic as you can get.
A while back, I worked out that 3D printing was going to be just as huge as everyone is saying, but that it was not going to get “domestic”, in the manner of like black-and-white laser printers for instance, in the foreseeable future (with the possible exception of certain kinds of food preparation). 3D printing is a vast range of specialist manufacturing techniques, and it will, for that foreseeable future, be used by people who already make specialist stuff by other and clumsier means, or who would like to make particular specialist stuff for the first time, of the sort that only 3D printing can do. See the quoted verbiage above.
This is why I receive emails from Google about failing 3D printing companies along with other emails about successful 3D printing activities, mostly by already existing companies. 3D printing is best done by people who already know a hell of a lot about something else, which they can then get 3D printed. Like: blood vessels.
The principle economic consequence of 3D printing will be to provide an abundance of jobs for people everywhere, but especially among the workers of the rich world, who, during the last few decades, have been famously deprived of many of their jobs by the workers of the poor world.
Prediction/guess. Because of things like 3D printing, schools in the rich world will soon become (are already becoming?) a bit more successful, back towards what they were like in the 1950s. This is because, as in the 1950s, there will again be an economic future for everyone in the rich countries, the way there has not been for the last few decades. For the last few decades, in the rich countries, only the geeks (in computers) and the alpha-male super-jocks (in such things as financial services (and in a tiny few cases in sports)) and posh kids (whose parents motivate them to work hard no matter what (this is a circular definition (posh kids are the ones motivated by their parents))) have had proper futures to look forward to. (These three categories overlap.) Accordingly, they have been the only ones paying proper attention in school. The rest have not been able to see enough point to it.
My spell of education blogging taught me, among many things, that when it comes to schools being successful, teacher quality is absolutely not the only variable. Good teachers can get bad results, if the kids just can’t doing with it. Bad teachers can preside over good results, if parents and helpers-out, paid or unpaid, after regular school supply good supplementary teaching, or if the kids were highly motivated and determined to learn despite their crappy teachers.
The one exception to the rule about 3D printers not becoming meaningfully domestic is that they have a big future as educational toys, training kids to go into the bouncing-back manufacturing sector.
I’ve been reading more of Matt Ridley’s The Evolution of Everything, from which a previous excerpt can be found here, here. It continues to be very good. In this bit, Ridley discusses the relationship between genetic and cultural evolution:
What sparked the human revolution in Africa? It is an almost impossibly difficult question to answer, because of the very gradual beginning of the process: the initial trigger may have been very small. The first stirrings of different tools in parts of east Africa seem to be up to 300,000 years old, so by modern standards the change was happening with glacial slowness. And that’s a clue. The defining feature is not culture, for plenty of animals have culture, in the sense of traditions that are passed on by learning. The defining feature is cumulative culture - the capacity to add innovations without losing old habits. In this sense, the human revolution was not a revolution at all, but a very, very slow cumulative change, which steadily gathered pace, accelerating towards today’s near-singularity of incessant and multifarious innovation.
It was cultural evolution. I think the change was kicked off by the habit of exchange and specialisation, which feeds upon itself - the more you exchange, the more value there is in specialisation, and vice versa - and tends to breed innovation. Most people prefer to think it was language that was the cause of the change. Again, language would build upon itself: the more you can speak the more there is to say. The problem with this theory, however, is that genetics suggests Neanderthals had already undergone the linguistic revolution hundreds of thousands of years earlier - with certain versions of genes related to languages sweeping through the species. So if language was the trigger, why did the revolution not happen earlier, and to Neanderthals too? Others think that some aspect of human cognition must have been different in these first ‘behaviourally modern humans’: forward planning, or conscious imitation, say. But what caused language, or exchange, or forethought, to start when and where it did?
Almost everybody answers this question in biological terms: a mutation in some gene, altering some aspect of brain structure, gave our ancestors a new skill, which enabled them to build a culture that became cumulative. Richard Klein, for instance, talks of a single genetic change that ‘fostered the uniquely modern ability to adapt to a remarkable range of natural and social circumstance’. Others have spoken of alterations in the size, wiring and physiology of the human brain to make possible everything from language and tool use to science and art. Others suggest that a small number of mutations, altering the structure or expression of developmental regulatory genes, were what triggered a cultural explosion. The evolutionary geneticist Svante Pääbo says: ‘If there is a genetic underpinning to this cultural and technological explosion, as I’m sure there is .. .’
I am not sure there is a genetic underpinning. Or rather, I think they all have it backwards, and are putting the cart before the horse. I think it is wrong to assume that complex cognition is what makes human beings uniquely capable of cumulative cultural evolution. Rather, it is the other way around. Cultural evolution drove the changes in cognition that are embedded in our genes. The changes in genes are the consequences of cultural changes. Remember the example of the ability to digest milk in adults, which is unknown in other mammals, but common among people of European and east African origin. The genetic change was a response to the cultural change. This happened about 5,000-8,000 years ago. The geneticist Simon Fisher and I argued that the same must have been true for other features of human culture that appeared long before that. The genetic mutations associated with facilitating our skill with language - which show evidence of ‘selective sweeps’ in the past few hundred thousand years, implying that they spread rapidly through the species - were unlikely to be the triggers that caused us to speak; but were more likely the genetic responses to the fact that we were speaking. Only in a language-using animal would the ability to use language more fluently be an advantage. So we will search in vain for the biological trigger of the human revolution in Africa 200,000 years ago, for all we will find is biological responses to culture. The fortuitous adopting of a habit, through force of circumstance, by a certain tribe might have been enough to select for genes that made the members of that tribe better at speaking, exchanging, planning or innovating. In people, genes are probably the slaves, not the masters, of culture.
Matt Ridley on Epicurus and Lucretius
Old photos of Enceladus
Steven Johnson on The Myth of the Ant Queen
A posh white van and a not so posh white van
Paul Kennedy on centimetric radar
Matt Ridley on how technology leads science and how that means that the state need not fund science
The uniqueness of our microbiome
An old story about colour perception
Bill Bryson on the miracle of crop rotation
On not letting either God or (the other) God do everything
Confirming my String prejudices
The colour of sound - I now get this because I just experienced it!
A global temperature graph that seems to fit the recent facts
Libeskind doing the saw cut style in Ontario
Dezeen continues to delight
Finding Rover app tracks lost dogs using facial recognition
Why I admire short term weather forecasts but why cricket people don’t
Views from Kings College
BMdotCOM mixed metaphor of the day
Feynman Diagrams on the Feynman van
Wedding photography (1): The superbness of the weather
Me and the Six Nations under the weather
The Qur’an is not science – science cannot be ignored
Steven Pinker’s description of The Enlightenment
Why I do not share Johnathan Pearce’s admiration for Bjorn Lomborg
What’s up with that?
BMdotCOM Headline of the week
University of California chickens coming home to roost?
Hockey Stick art
Matt Ridley’s demolition of CAGW
Science can relax about the harm done to it by Climategate
“Things appear almost impossible to escape from …”
Animals that like the smell of humans dying
Climate science as make-work for former Cold Warriors
Cats only seem smart and dogs only seem dumb
Cats know more about fluid mechanics than dogs
Funny feline ephemeron
A blog posting linking to a science article
Cool cat that obeys Allen’s Rule
A serious disappointment
Lucky we didn’t go to Lords
Nasa and Gordon Brown both have their uses
Talking about The Hockey Stick Illusion with Bishop Hill
Towers under the weather - and a steam engine steams to the rescue
Stepping forward into the abyss!
Yet more ramblings about Guesswhatgate
Unravelling the puzzle – and making it into a movie
Picture purrfection and a rather good Clive James piece
Old-school media versus (or becoming) new-school media (again)
ClimateGate roars on and Man(n)-made warming is taking on a whole new meaning
What’s up with this?
Link to a list of peer-reviewed papers supporting skepticism of “man-made” global warming
Shadows on rings
Green cats - feral cats - cats murdered in Wales - more than 113 cats in Livingston NJ
Why I vote against AGW
A little archaeology
Friday baby marmoset
Truth is true
Nothing from me here today but something on Samizdata about cannabis
Link to Samizdata piece about arguments from incredulity
The impossibility of God but the possibility of Michael Flatley’s cure and of super-super-flees
How patent lawyers destroyed a mathematician
John Carey on Shakespeare and the high-art/ popular-art distinction
On the nature of the evolution argument
Star and stripe
Man regrows finger
More horizontal thinness
Tatiana the normal tiger
Has global warming stopped?
Better safe than sorry
The cat genome is cool
She’s alive I tell you! Alive!
Big Solar System things
Short picture of a long distance
Don’t be a physics teacher
Not actually a photo of Saturn’s rings
Back lit Billion Monkey lady and back lit Saturn!
The idea that mental illness does not exist
Plastic that conducts heat better
So that’s how you pronounce Csikszentmihalyi
Thomas Edison - from cheat to creator
Alessandro Volta feels electricity on his tongue
The Great Global Warming Swindle debate now begins
Svensmark – for and against
A basic part of the domestic cat’s heritage
On the ideology of the “climate change” debate
New York Times links - owned genes
I am about to become a published photographer
Geek girl I like your thinkings - are nice - I want have sex with it
Something to bore everyone
Blogging takes longer than doing things - a picture - and why does a hot bath make me colder?
Was that you or a tree?
What is a squarry?