Digital Earth

Last weekend I discovered (1) that Google Earth was even more amazing than I had previously thought [and now they have a Mac version as well!]; and (2) there is a lot more out there in terms of digital geography if you look a bit harder.

Here is for example this USGS site from which you can download (with some patience) not only the usual satellite imagery but digital elevation models (DEMs) as well, for pretty much the whole globe [thanks to my friend Radu Girabcea for pointing me to it]. Once you’ve got a DEM, you can use 3dem, a nice little piece of freeware to display the elevation models in 2D and 3D and to drape georeferenced images over the topography. DEMs are available (for free — at least at this point) with a ~10 m resolution for most of the US and a ~30 m resolution for other areas (I was especially excited to savor the detailed topography of the Carpathians — the more familiar you are with a place, the more illuminating it can be if you examine the morphology).

Another thing worth taking a look at is NASA’s version of Google Earth, that is, World Wind. With one click, you can switch from Landsat images to USGS topographic maps [although I often have problems with the server connection]. Can it get a lot better than this?

The culture of science

[this article was published in Ad Astra in 2004]

An interview grabbed my attention in a Romanian newspaper a few months ago. A “researcher” claimed that, in his book entitled “The Final Truth”, he presented a theory that “bridges the gaps between the idealistic, materialistic and ezoteric worldviews”; that thoughts cannot arise in the human brain, they must come from somewhere else; that Darwininan evolution is wrong; that there must be another Universe that “consists of electromagnetic waves of higher frequencies”; and that this high-frequency Universe is the source of all human thought, UFOs, religion, astrology and paranormal phenomena.

The fact that somebody, who by all means would satisfy most criteria for the recognition of a crackpot, comes up with a handful of ideas that are either age-old or simply silly and tries to sell them as revolutionary scientific results is not new and would not grab my attention anymore. It was the style of presentation that forced me to think about this article a bit longer: the editor (and interviewer) tried to create an aura of scientific authenticity by saying that people from Chalmers University in Goteborg, Sweden and the Hungarian Academy of Science “expressed interest” in the book; and by mentioning that the author has spent many years doing research on these subjects in Sweden. I could not resist writing a letter to the newspaper and pointing out that the “research” of this gentleman is far from being science and, if presented at all, it should be presented accordingly, either as metaphysics or philosophy (of the sloppiest kind, I must add), or as just another muddled rambling about other-worldly energies and paranormal nonsense. But not as science and a Nobel-prize-worthy intellectual achievement.

The letter was published, and it generated a series of pro-and-con articles in the Transylvanian newspaper. With the exception of a mathematician, who was slightly critical of “The Final Truth” and its author, everybody, including the editor, were enthusiastic about them. They either said that this was science, my opinion nonwithstanding, or that this was more than science, because it integrates the ‘spiritual dimension’ with what we know from science. Those who argued against my criticisms included a ‘chief psychiatrist’ and a ‘university professor’. After a few months of replies-to-the-replies, the editor finally closed the argument by writing that he was proud of starting these series of articles about “The Final Truth”, and the importance of the book was also suggested by the fact that it drew the attention of “American researchers” as well. He just forgot to mention what the “American researchers” had to say about it.

It is true that the newspaper I am talking about is not a major paper in Romania; that it is published in Hungarian, therefore it has a relatively small readership in Transylvania, more precisely in the city of Cluj. I think however that it is diagnostic of the attitudes towards science in this part of Europe. After all, Cluj has one of the largest universities in Europe (more than 40,000 students and 1500 faculty), and I find it worrysome that nobody of the several thousand Hungarian-speaking faculty members and students takes the time to fight such science-bashing or science-degrading nonsense that surfaces from time to time in the media. They either don’t know how to tell good science from bad science or pseudoscience, or they do know but they couldn’t care less.

It seems to me that back home, science, if the word is understood correctly – as we saw, sometimes it isn’t -, is not considered an essential part of being well-read, well-informed, and well-educated. A lot of ‘intellectuals’ are enthusiastic about science – as long as astrology or chinese medicine are included, as long as great scientists can be used as boosters of national pride, or as long as you do not exclude postmodern literary criticism (the term “literature science”is often used in Hungarian and it gives a hint of how broad the meaning of the word ‘science’ is in some circles). When I was in high school in a small Transylvanian town near Brasov, math and physics were thought to be important only because at that time (in the eighties) these subjects meant the safest route towards college education. Almost everybody seemed to know that real knowledge and real culture can only come from the study of literature, art and history. And I think this attitude did not change since then, or it even got worse: it is still OK if you don’t know what a fractal is or how the genetic machinery inside us works, but you cannot be a real intellectual if you cannot talk about Shakespeare, Ionesco, Derrida or Tarkovsky for at least as long as two beers last at the pub. In their excellent paper on the status of science in post-communist Romania, Liviu Giosan and Tudor Oprea suggest that “culture wars” between the “two cultures” would be “suicidal at best”. However, I am afraid that there is no danger of “culture wars” or “science wars” in Romania, simply because the intellectual elite is dominated by people with little or no scientific background and a ‘culture of science’ does not exist. One obvious piece of evidence is that none of the major Romanian daily newspapers has a science and/or technology section. While ‘science writing’ has become an exciting profession in the West, it is essentially non-existent in Romania. Yes, Discovery Channel is available in many cities [let’s put aside now the fact that not all of its programs are scientific] and I hear there is even a Romanian edition of Scientific American, but, to put it mildly, there is a lot of room for improvement in making science more socially accepted, better understood, and part of mainstream culture.

More reliable than my little pieces of anecdotic evidence are the results of a recent study prepared for the European Commision: an Eurobarometer report on “public opinion in the countries applying for European Union membership”. There are several statistics that suggest a positive attitude towards science in the candidate countries in general, including Romania. For instance, 78 % of Romanians (81 % on average in the thirteen countries) agree with the statement that “science and technology are making our lives healthier, easier and more comfortable”. Also, 74 % think that “even if it brings no immediate benefits, scientific research which adds to knowledge, is necessary and should be supported by government”, and scientists are regarded by 51 % of the respondents as having a highly prestigious profession. Other numbers however are less encouraging. In the category of “knowledge of fundamental scientific facts”, the average number of correct answers given by participants in Romania is significantly below the average in the EU or in many other Eastern European countries. Compared to the rest, Romanians did poorly in in recognizing the scientifically correct method for drug testing (15 % correct answers compared to more than 30% in most other countries).

I am not convinced that these differences are extremely important or disconcerting. The gaps between statistics on science in Romania and in other candidate countries or the EU increase from barely significant to orders of magnitude as one goes from the attitudes and knowledge among the population to governmental investments in R&D and to the number of scientific publications. To add only one number to the detailed analysis by Giosan and Oprea (2003): the gross domestic expenditure on R&D in the field of natural sciences in 2000 was 12.1 million euros in Romania, compared to 59.1 million in Hungary, 185.9 million in the Czech Republic, and 261.9 million in Poland (Simona Frank: R&D expenditure and personnel in the candidate countries in 2000, Statistics in focus, Science and technology, Theme 9-1/2003).

But my main concern here is not science policies, R&D expenditure, or the quantity and quality of research in Romania. What I wanted to and started to talk about is the lack of a culture of science in the mass media and among intellectuals in general, including even many of those who are employed by universities or research institutes.
Science has become much more popular and fashionable in the West during recent decades. Numerous science books written for the general public in a simple and easy-to-understand language – but without too much dumbing down – are bestsellers; it is possible now to make a succesful Hollywood movie about the life of a mathematician (I am talking about ‘A Beautiful Mind’); most large bookstores have an impressive collection of popular science books. Some of these books are much more than popular science: they are frequently cited in the real scientific literature and have a strong influence on the field; many represent an inspired – and inspiring – mix of scholarship in the natural sciences, philosophy, and good writing. Authors like Richard Dawkins, Stephen Jay Gould, Steven Pinker, Daniel Dennett, Steven Weinberg have become a lot more popular than numerous highly regarded names in postmodern literary criticism and philosophy. [Frankly, I am not surprised. Try reading an essay or a book by one of the science guys and compare it to a representative writing of the of the postmodernist camp.] Museums of science, technology and natural history in the United States are larger, richer, and more interactive than ever. Whenever a famous scientist gives a public presentation, lecture halls are quickly filled and tickets are sold out in advance. A few months ago Stephen Hawking gave a lecture in Houston. All of the almost 5000 tickets that went on sale were gone by the time of the presentation.

It seems like the two cultures of C. P. Snow are antagonistic or lack real communication only in the eyes of those who still see the arts and the social sciences entirely independent of the natural sciences. The best and some of the most influential thinkers of our time are scientists who are also good writers – or writers/artists who know quite a bit about science. This ‘culture of science’ has been given the name “third culture” by literary agent and science writer John Brockman and is promoted on his website “The Edge” (http://www.edge.org), a discussion forum for a distinguished group of scientists and ‘new humanists’. Twelve years after introducing the idea of the ‘third culture’, Brockman suggests that “the third culture now includes scholars in the humanities who think the way the scientists do. Like their colleagues in the sciences, they believe there is a real world and their job is to understand it and explain it. They test their ideas in terms of logical coherence, explanatory power, conformity with empirical facts. (…) They are not reducing the humanities to biological and physical principles, but they do believe that art, literature, history, politics – a whole panoply of humanist concerns – need to take the sciences into account.”

As I already suggested, I do not think that the ‘third culture’ and the ‘new humanists’ have a strong presence in Romania. Most people base their worldviews entirely on tradition and authority or embrace either the numerous new waves of mysticism and pseudoscience or a nihilistic and relativistic postmodernism. Although not everything is going well in this regard in the Western world either, I still hope that getting closer politically and economically to the European Union will increase not only the quantity and quality of research in Romania, but will also improve science education and the acceptance and understanding of science.

Like in other, more western parts of the world, most people in Romania seem to have an overall positive attitude toward science. They just don’t know what exactly it is. Those few who know better have the responsibility of educating the general public. For example, by speaking out when pseudeoscientific or antiscientific nonsense hits the media; explaining in simple terms but with convincing logic why pseudoscience is not science or why darwinism and evolutionary theory cannot and should not be blamed for the horrors of fascism and communism. It is unlikely that a country will have its Silicon Valleys and a greatly succesful economy as long as its political leaders and influential intellectuals do not recognize the importance and value of both scientific research and science education. In the long term, they should also realize that the social sciences and humanities cannot ignore the natural sciences anymore. As evolutionary biologist Edward O. Wilson put it, “most of the issues that vex humanity daily – ethnic conflict, arms escalation, overpopulation, abortion, environment, endemic poverty, (…) cannot be solved without integrating knowledge from the natural sciences with that of the social sciences and humanities. Only fluency across the boundaries will provide a clear view of the world as it really is, not as seen through the lens of ideologies and religious dogmas or commanded by myopic response to immediate need.”

References

1. L. Giosan and T. Oprea. Science in post-communist Romania. Ad Astra, 1 (2) 2002.
2. Candidate countries Eurobarometer. Public opinion in the countries applying for European Union membership. CC-EB 2002.3 on science an technology. European Commission, January 2003.
3. S. Frank. R&D expenditure and personnel in the candidate countries, in 2000, Statistics in focus, Science and technology, Theme 9-1/2003.
4. C. P. Snow. The two cultures. Cambridge University Press, 1993.
5. E. O. Wilson. Consilience: the unity of knowledge. Vintage Books, 1999.

Global warming does not cause earthquakes

According to Wired magazine’s “Biggest Discoveries of 2005“, the most important discovery of 2005 is that

Thanks to the Asian tsunami and Hurricane Katrina, global warming can no longer be ignored.

I agree that global warming can no longer be ignored, but you don’t need to know too much about earth science to realize that the Asian tsunami has absolutely nothing to do with it.

Same content, new form

Welcome to the redesigned zs blog. I think it looks a bit more professional than before. I tried Typepad for a change, but in the end I prefer Blogger. At least Blogger lets you tinker with the blog template as much as you want — for free. Of course, my knowledge of cascading style sheets and such is limited, but I was still able to give it a slight personal touch, so that it does not look exactly like every third blog on blogspot.com. The only thing I would like to have (and Typepad has it) is the possibility to organize posts into categories, but I guess I will have to live without that.

The truth about the Enlightenment

An excellent article by philosopher Simon Blackburn. It is great to hear somebody talk like this after all the noise about the coming apocalypse, the anti-humanism of science, the dangers of technology, and so on:

“The west, it is sadly said, has lost confidence in the Enlightenment. It is quite common to see intellectuals state as a fact that the Enlightenment project has been tried and failed. This is a lie. There never was one single Enlightenment project, and of the Enlightenment projects that there were, many have succeeded beyond the wildest hopes of their proponents. The Enlightenment provided the matrix I have talked of, in which scientific enterprises could flourish. Now, our understanding of the world is better because of physical science. Our understanding of ourselves is better because of biological science. We live longer, and we feed ourselves better, and ‘we’ here includes not only people in first world countries, but countless people in the third world. We look after the environment better, and in time we will manage our own numbers better. Outside the theocracies of the east more people have more freedoms and enjoy more education, more opportunities and may even have more rights than ever before. We owe this progress entirely to the culture forged, in the west, by Bacon and Locke, Hume and Voltaire, Newton and Darwin. Humanism is the belief that humanity need not be ashamed of itself, and these are its great examples. They show us that we need not regard knowledge as impious, or ignorance as desirable, and we need not see blind faith as anything other than blind.”

The fractal nature of Einstein’s and Darwin’s letter writing

Power laws are gathering quite some attention again, thanks to a few new papers (e.g., this one and this one) by Albert-László Barabási and his coworkers, published in Nature. Cosma Shalizi and others disagree: once again, just because some dataset on a log-log plot looks like you could easily fit a straight line to it, it is not safe to conclude that it is a power-law distribution.

One of the papers looks at the letter-writing habits of Darwin and Einstein, and concludes that the response times have a power-law distribution with an exponent of 3/2. The other “reports that the probability distribution of time intervals between consecutive emails sent by a single user and time delays fro eamil replies follow a power law”. Shalizi and Stouffer et al. claim that these are in fact lognormal distributions.

I am wondering if you could ever get a paper published in Nature that looks at some dataset, shows that it has normal or lognormal distribution, draws some overarching and universal conclusions from that, and… and that’s it.

Or, to translate it to the much more mundane language of geologists, that only applies to dirt, not to Einstein’s letters: there is no interesting story in showing that bed thicknesses or sedimentary body sizes have a lognormal distribution, but if it’s a power law, suddenly you can talk about the “scale-independent physics of turbidite deposition” and the importance of non-equilibrium thermodynamics in the geometries of deltas and everything else under the sun.

That’s why power laws are great.

Hurricanes and barrier islands

Here is the reason why one should think twice about buying or building a house on a barrier island that is in hurricane country. This USGS website also shows convincingly that Hurricane Rita should not be misunderestimated 🙂 just because it barely touched the Houston-Galveston area. It did plenty of damage where the right-front qaudrant made landfall – things would have been very different around here if Rita made landfall at Galveston or a bit to the West of Galveston.

And these images of a barrier island that migrates landward as hurricanes go over it make you wonder how much of the geologic record of barrier islands (and beaches in general) actually consist of fairweather deposits. Everything seems to be moving and redepositing during these storms.

The largest traffic jam in the known Universe

Hurricane Rita is gone. And, as Stan Marsh of South Park would say, we learned something today: don’t trust the local and state and federal government, people who are supposed to give you advice and help during an emergency situation. Don’t trust them because they often seem incompetent, arrogant, dishonest, and self-congratulating.

To be more precise, on Wednesday, September 21, we decided that the best thing to do is to leave Houston, and left on the next morning. After six hours in the car, we were about 20 miles away from our home, and we already used up more then a quarter of the gas in the tank. That was the point when we turned around, and that was the right thing to do. Clearly, we were in the largest traffic jam in the known Universe. Important people like mayors and judges kept saying on the radio that (1) they were going to make all lanes of the highway one-way, and (2) gasoline was going to be provided by tanker trucks. After six hours, we could see no evidence of this whatsoever. We realized that we would sooner or later run out of gas and be stranded on the highway, at the merci of other people, or even worse, at the merci of the authorities who were arrogant enough to say at one point that they were not responsible for the traffic backups outside of their jurisdiction. And it is clearly better to be in a building as opposed to a car on a highway when hurricane-force winds start providing the entertainment.

I don’t get this. Do you have to be a rocket scientist to realize that, if you put 3 million people or possibly more at the same time on three highways, you will end up with humongous traffic backups and all those people will have to spend tens of hours or even several days on the roads? I understand that you want to evacuate as many people as possible when a category 5 hurricane is approaching, but that does not mean that you should create panic and call for evacuation in a totally disorganized way. During the days before the landfall of Rita, I haven’t seen on television a map of the three mandatory evacuation zones; I haven’t heard a definition of so-called low-lying areas of Harris county (are they below the 20 ft elevation? 30? 50?); and I haven’t seen a map of the road conditions on the major evacuation routes. How can you call this botched job a “successful evacuation” when there was no gas, no water, no food along the evacuation routes, opening up the counterflow lanes took forever, and most people went through a whole lot of unnecessary suffering and stress?

Shameless plug for Google, Smugmug, and my own photos

Uploaded some new (and not-so-new) photos to smugmug. Here are a few from our recent geological trip to the Canadian Rockies (more precisely the Caribou Mountains near McBride, British Columbia); these were taken during the trip with my father and Aniko in Rocky Mountain, Grand Teton, and Yellowstone National Parks; and, finally, a bunch of nice ripple marks from Sea Rim State Park in Texas.

I have to say I am very happy with smugmug; it is not free (the cheapest membership is 30$ / year), but you certainly get what you pay for. I think the design and the style are great, you can upload and view photographs as large as you want, etc. — see their list of advantages here. And recently they have adapted the Google Maps API to add mapping capabilities to the photos; that is, you can type in a latitude and longitude for your photo and smugmug will place a tag on the map. Check this out for example. I think Google is making fantastic progress with both Google Maps and Google Earth; who would ever want to go back to Mapquest or other indistinguishable map services after trying Google’s maps?

Dawkins against Intelligent Design

Richard Dawkins (this time with Jerry Coyne of the University of Chicago) explains it again, in probably the most clear language you can find, why intelligent design should not be taught alongside evolution in science classes:

What is wrong with the apparently sweet reasonableness of “it is only fair to teach both sides”? The answer is simple. This is not a scientific controversy at all. And it is a time-wasting distraction because evolutionary science, perhaps more than any other major science, is bountifully endowed with genuine controversy.

Among the controversies that students of evolution commonly face, these are genuinely challenging and of great educational value: neutralism versus selectionism in molecular evolution; adaptationism; group selection; punctuated equilibrium; cladism; “evo-devo”; the “Cambrian Explosion”; mass extinctions; interspecies competition; sympatric speciation; sexual selection; the evolution of sex itself; evolutionary psychology; Darwinian medicine and so on. The point is that all these controversies, and many more, provide fodder for fascinating and lively argument, not just in essays but for student discussions late at night.

Intelligent design is not an argument of the same character as these controversies. It is not a scientific argument at all, but a religious one. It might be worth discussing in a class on the history of ideas, in a philosophy class on popular logical fallacies, or in a comparative religion class on origin myths from around the world. But it no more belongs in a biology class than alchemy belongs in a chemistry class, phlogiston in a physics class or the stork theory in a sex education class. In those cases, the demand for equal time for “both theories” would be ludicrous. Similarly, in a class on 20th-century European history, who would demand equal time for the theory that the Holocaust never happened?

Talking about Dawkins: in the September issue of Discover magazine, there is an article about him entitled “Darwin’s Rottweiler – Sir Richard Dawkins: Evolution’s fiercest champion, far too fierce“. The author, Stephen S. Hall, paints an overall positive picture about Dawkins, but, as he makes it clear already in the title, he thinks that Sir Richard is “far too fierce”. This is how the article ends:

This recusal underlines the most obvious contradiction about Richard Dawkins and the cultural war in which he has so much to contribute: You can be the world’s greatest apostle of scientific rationalism, but if you come across as a rottweiler, Darwin’s or anybody else’s, when you enter that marketplace, it’s very hard to make the sale.

Well, first of all, in most of his writings and talks, Dawkins does not come across to me as a rottweiler. Read the quotation above: is there any barking and biting in it? I don’t think so. It just states facts and draws conclusions that make sense to any reasonable person. 99% percent of his books consist of crystal-clear explanations of how evolution or science in general work. The remaining 1% is similarly well-written and convincing – it just happens that a lot of people are offended because it makes them uncomfortable. Should he never talk about religion just because some people get offended? There are incredibly few people who have the intellect and courage to talk about these issues honestly; even if you disagree sometimes with him, why should one of the most eloquent guys shut up?

At times when American science education is endangered by a few politically powerful, but scientifically challenged people, we would need to clone professor Dawkins, not to tame him. When it comes to speaking the truth in clear and honest terms, I wish we had more rottweilers of the calibre of Dawkins and fewer lapdogs that never bark and never bite.