Farms in the Sky Gain New Interest

Bina Venkataraman in the New York Times:

Screenhunter_02_jul_16_1553What if “eating local” in Shanghai or New York meant getting your fresh produce from five blocks away? And what if skyscrapers grew off the grid, as verdant, self-sustaining towers where city slickers cultivated their own food?

Dickson Despommier, a professor of public health at Columbia University, hopes to make these zucchini-in-the-sky visions a reality. Dr. Despommier’s pet project is the “vertical farm,” a concept he created in 1999 with graduate students in his class on medical ecology, the study of how the environment and human health interact.

The idea, which has captured the imagination of several architects in the United States and Europe in the past several years, just caught the eye of another big city dreamer: Scott M. Stringer, the Manhattan borough president.

When Mr. Stringer heard about the concept in June, he said he immediately pictured a “food farm” addition to the New York City skyline. “Obviously we don’t have vast amounts of vacant land,” he said in a phone interview. “But the sky is the limit in Manhattan.” Mr. Stringer’s office is “sketching out what it would take to pilot a vertical farm,” and plans to pitch a feasibility study to the mayor’s office within the next couple of months, he said.

More here.



Retiring ‘Darwinism’

Photo Olivia Judson over at The Wild Side:

I’d like to abolish the insidious terms Darwinism, Darwinist and Darwinian. They suggest a false narrowness to the field of modern evolutionary biology, as though it was the brainchild of a single person 150 years ago, rather than a vast, complex and evolving subject to which many other great figures have contributed. (The science would be in a sorry state if one man 150 years ago had, in fact, discovered everything there was to say.) Obsessively focusing on Darwin, perpetually asking whether he was right about this or that, implies that the discovery of something he didn’t think of or know about somehow undermines or threatens the whole enterprise of evolutionary biology today.

It does not. In the years ahead, I predict we will continue to refine our understanding of natural selection, and continue to discover new ways in which it can shape genes and genomes. Indeed, as genetic data continues to flood into the databanks, we will be able to ask questions about the detailed workings of evolution that it has not been possible to ask before.

Yet all too often, evolution — insofar as it is taught in biology classes at all — is taught as the story of Charles Darwin. Then the pages are turned, and everyone settles down to learn how the heart works, or how plants make energy from sunshine, or some other detail. The evolutionary concepts that unify biology, that allow us to frame questions and investigate the glorious diversity of life — these are ignored.

Darwin was an amazing man, and the principal founder of evolutionary biology. But his was the first major statement on the subject, not the last.

Venomous Snakes, Slippery Eels and Harun Yahya

Richard Dawkins at his website:

Screenhunter_01_jul_16_1506In 2006, I was one of tens of thousands of academic scientists all around the world who received, unsolicited and completely free, a huge and lavishly illustrated book called Atlas of Creation by the Turkish Muslim apologist Harun Yahya. The thesis of the book, which was published in eleven languages, is that evolution is false. The main ‘evidence’ consists of page after page of beautiful photographs of fossil animals, each one accompanied by a modern counterpart that is said to have changed not at all since the time of the fossil. It is a large-format book, a thick coffee-table book with more than 700 high-gloss colour pages. The cost of production of such a book must have been extremely high, and one is bound to wonder where the money came from to produce it and then distribute it gratis in so many copies and so many languages.

Given that the entire message of the book depends upon the alleged resemblance between modern animals and their fossil counterparts, I was amused, when I began flicking through at random, to find page 468 devoted to “eels”, one fossil and one modern. The caption says:

There are more than 400 species of eels in the order Anguilliformes. That they have not undergone any change in millions of years once again reveals the invalidity of the theory of evolution.

The fossil eel shown may well be an eel, I cannot tell. But the modern “eel” that Yahya pictures (see photo) is undoubtedly not an eel but a sea snake, probably of the highly venomous genus Laticauda (an eel is, of course, not a snake at all but a teleost fish). I have not scanned the book for other inaccuracies of this kind. But given that this was almost the first page I looked at . . . what price the main thesis of the book that modern animals are unchanged since the time of their fossil counterparts?

Incidentally, in May 2008 Harun Yahya, whose real name is Adnan Oktar, was sentenced in a Turkish court to a three-year prison sentence “for creating an illegal organization for personal gain.”

More here.  [The last example Dawkins gives is too good!]

Wednesday Poem

//

The Unknown Citizen
W.H. Auden

(To JS/07/M/378 This Marble Monument Is Erected by the State)
……………………………………………………………..

He was found by the Bureau of Statistics to be

One against whom there was no official complaint,

And all the reports on his conduct agree

That, in the modern sense of an old-fashioned word, he was a saint,

For in everything he did he served the Greater Community.

Except for the War till the day he retired

He worked in a factory and never got fired,

But satisfied his employers, Fudge Motors Inc.

Yet he wasn’t a scab or odd in his views,

For his Union reports that he paid his dues,

(Our report on his Union shows it was sound)

And our Social Psychology workers found

That he was popular with his mates and liked a drink.

The Press are convinced that he bought a paper every day

And that his reactions to advertisements were normal in every way.

Policies taken out in his name prove that he was fully insured,

And his Health-card shows he was once in hospital but left it cured.

Both Producers Research and High-Grade Living declare

He was fully sensible to the advantages of the Installment Plan

And had everything necessary to the Modern Man,

A phonograph, a radio, a car and a frigidaire.

Our researchers into Public Opinion are content

That he held the proper opinions for he time of year;

When there was peace, he was for peace; when there was war, he went.

He was married and added five children to the population,

Which our Eugenist says was the right number for a parent of his generation.

And our teachers report that he never interfered with their education.

Was he free? Was he happy? The question is absurd:

Had anything been wrong, we should certainly have heard.

//

‘The Leopard’ Turns 50

From The New York Times:

Donadio190 In his posthumous book “On Late Style: Music and Literature Against the Grain” (2006), the critic Edward Said called “The Leopard” “a Sicilian ‘Death of Ivan Ilyich,’ which in turn masks a powerful autobiographical impulse.” Don Fabrizio, Said wrote, was “in effect the last Lampedusa, whose own cultivated melancholy, totally without self-pity, stands at the center of the novel, exiled from the continuing history of the 20th century, enacting a state of anachronistic lateness with a compelling authenticity and an unyielding ascetic principle that rules out sentimentality and nostalgia.” In the family palazzo in Palermo, Lampedusa slept in the same room in which he was born and in which he expected to die. But in 1943 an Allied bomb severely damaged the building, which was later abandoned. Although “The Leopard” ends in 1910, it contains a glimpse of the future: “From the ceiling the gods, reclining on gilded couches, gazed down smiling and inexorable as a summer sky. They thought themselves eternal; but a bomb manufactured in Pittsburgh, Pennsylvania, was to prove the contrary in 1943.”

“The novel helped him reconstitute things he’d lost,” Lanza said at N.Y.U. Like Thomas Mann, he said, Lampedusa had been born into “the full flowering of European civilization,” only to see it eclipsed. “They became prophets of the Europe that thought of itself as the hegemony and then was superseded by the United States.”

More here.

Sleep loss produces false memories

From Nature:

Sleepingman Sleepless nights can increase your chances of forming false memories, according to researchers in Germany and Switzerland. But, as for so many aspects of life, it seems that coffee can save the day. Although neuroscientists know that memories can be strengthened while we are asleep, it’s been unclear whether false memories form as we slumber or whether they are only consolidated when we are asked to recall the information the following morning. To find out, Susanne Diekelmann in Jan Born’s lab at the University of Lübeck, Germany, and her colleagues asked volunteers to learn lists of words, each list relating to a particular topic. For example, they might learn the words ‘white’, ‘dark’, ‘cat’ and ‘night’ — all of which can be linked to the word ‘black’ — but black itself would not be part of the list.

The researchers then tested their subjects’ memories after a night’s sleep or a night spent awake. They showed them the list of words again, having added a few extra words, and asked them to recall whether the words had been in the original list. The sleep-deprived group gave more false responses than the group allowed to sleep. “A lot of subjects said, ‘yes, these false words were presented before’, and they were absolutely sure about it,” says Diekelmann. “Sometimes they were even more convinced than on the real words.” Diekelmann suggests that it isn’t sleep deprivation itself that causes the formation of false memories, but the act of retrieving them from storage.

More here.

Tuesday, July 15, 2008

the precautionary principle

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SCIENTISTS AGREE THAT the climate is changing, but they debate the extent of the danger. In the face of that disagreement, many people are asking: If we are uncertain, shouldn’t we take aggressive action? The planet is at risk, the argument goes, and so it would be prudent to take bold steps immediately…

These apparently sensible questions have culminated in an influential doctrine, known as the precautionary principle. The central idea is simple: Avoid steps that will create a risk of harm. Until safety is established, be cautious; do not require unambiguous evidence. The principle, in its many variations, has come to play a powerful role in public debate, the development of government policy, and even international law. It can be, and has been, applied to countless problems, including nuclear power, cellphones, pesticides, electromagnetic fields, and even human cloning.

Yet the precautionary principle, for all its rhetorical appeal, is deeply incoherent. It is of course true that we should take precautions against some speculative dangers. But there are always risks on both sides of a decision; inaction can bring danger, but so can action. Precautions, in other words, themselves create risks – and hence the principle bans what it simultaneously requires.

more from Boston Globe Ideas here..

The Controversy Over the New Yorker Cover of the Obamas

Original By now most of you probably will have seen the cover of the latest New Yorker.  And most of you will have noted the brewing storm.  Bill Carter in the NYT:

The New Yorker faced a different kind of hostility with its cover this week, which the Obama campaign criticized harshly. A campaign spokesman, Bill Burton, said in a statement that “most readers will see it as tasteless and offensive — and we agree.”

Asked about the cover at a news conference Monday, Mr. McCain said he thought it was “totally inappropriate, and frankly I understand if Senator Obama and his supporters would find it offensive.”

The cover was drawn by Barry Blitt, who also contributes illustrations to The New York Times’s Op-Ed page. David Remnick, the editor of The New Yorker, said in an e-mail message, “The cover takes a lot of distortions, lies, and misconceptions about the Obamas and puts a mirror up to them to show them for what they arBlog_new_yorker_obama_remixe.

“It’s a lot like the spirit of what Stephen Colbert does — by exaggerating and mocking something, he shows its absurdity, and that is what satire is all about,” Mr. Remnick continued.

[Kevin Drum’s reaction at Washinton Monthly]:

I had two reactions, myself. To be honest, my first one was that it was kinda funny, a clever way of mocking all the conservative BS that’s been circulating about the Obamas.

But at the risk of seeming humorless, that reaction didn’t last too long. Maybe it’s because this kind of satire just doesn’t work, no matter how well it’s done. But mostly it’s because a few minutes thought convinced me it was gutless. If artist Barry Blitt had some real cojones, he would have drawn the same cover but shown it as a gigantic word bubble coming out of John McCain’s mouth — implying, you see, that this is how McCain wants the world to view Obama.

Where the Hell is Matt?

If you haven’t already seen it, watch the video:

Then read the article by Charles McGrath in the New York Times:

There are no weekend box office charts for online videos. But if there were, near or at the very top of the list right now might well be a four-and-a-half-minute video called “Dancing,” which more than four million people have viewed on YouTube, and perhaps another million on other sites, in the just over two weeks since it appeared. It’s the online equivalent of a platinum hit, seeping from one computer to the next like a virus.

The title is not misleading. “Dancing” shows a guy dancing: a big, doughy-looking fellow in shorts and hiking boots performing an arm-swinging, knee-pumping step that could charitably be called goofy. It’s the kind of semi-ironic dance that boys do by themselves at junior high mixers when they’re too embarrassed to partner with actual girls.

More here.  Almost as good as the Numa Numa Song, no?  [Thanks (?!) to Ruchira Paul.]

Tough Times for the Taz

From Science:

Devil Contagious cancer has been sweeping through populations of Tasmanian devils, killing most of the adults. Now, young devils are breeding earlier than ever before. But is this a case of rapid evolution or just a fleeting response to a changing environment?

Tasmanian devil facial tumor disease surfaced in Tasmania about 10 years ago and now affects the majority of devils on the island. Lesions around the animal’s mouth can grow as large as Ping-Pong balls and spread over the face; unable to eat, the devils die of starvation within months of the cancer’s appearance. The disease is highly contagious, and adults are particularly susceptible, possibly because the tumor cells are often spread during sexual contact. The problem has proved so devastating that Tasmanian devils were declared an endangered species in May.

Zoologist Menna Jones of the University of Tasmania has also noticed a sharp increase in pregnancies among 1-year-old devils. Normally, the animals, which live about 6 years, don’t breed before age 2. But when Jones and colleagues gauged the age and reproductive status of devils–via tooth erosion and sex organ development–they found evidence for breeding several months to a year earlier than normal at four out of five sites studied. The proportion of early breeding females reached a surprising 83% at one location, the team reports this week in the Proceedings of the National Academy of Sciences.

The shift toward early breeding could be an evolutionary response, says Jones. By killing any adults that breed after age 2, the cancer could be genetically selecting for younger breeding females, she notes. If so, the findings would make the devil the first known mammal to rapidly evolve its reproductive patterns in response to a disease.

More here.

Saved and Depoliticised at One Stroke

Report from Kosovo

Jeremy Harding in the London Review of Books:

Screenhunter_13_jul_15_1207‘Humanitarian intervention’ has little to show for its brief appearance on the international stage. It arrived too late for Rwanda, gestured helplessly at Bosnia and, at last, in 2003, it was discovered in the arms of Shock and Awe, where it died of shame. Only Kosovo Albanians, about 1.8 million people, still applaud the violent expulsion of Slobodan Milosevic from their province in 1999. However they are less sure about the legacy of intervention and the advantages of being a United Nations protectorate.

If intervention was supposed to bring about development, which optimists see as a prelude to civility, it has not been a success. The most startling features of Kosovo, now that the cleansing of the Serbian minority is on hold, are the poverty of the province – for Albanians and Serbs alike – and the pitiful economy that keeps it locked in. Despite the creation of a small millionaire class, 45 per cent of its inhabitants are below the poverty level (unable to meet basic needs). Around 15 per cent live in extreme poverty, earning less than a euro a day. Most of Kosovo’s poor are supported by networks of extended family and clan, more important by far than the structures of organised politics or religion: a majority of Albanians in Kosovo are Sunni Muslims, only loosely observant, and a small Catholic minority is on the rise. In the absence of public provision or private sector wealth creation, it’s the cousins who count.

More here.

Taking a Cue From Ants on Evolution of Humans

Nicholas Wade in The New York Times:

Ants_4 Ants are Dr. Wilson’s first and enduring love. But he has become one of the world’s best-known biologists through two other passions, his urge to create large syntheses of knowledge and his gift for writing. Through the power of his words, he champions the world’s biodiversity and regularly campaigns for conservation measures.

Though he celebrated his 79th birthday last month, Dr. Wilson is generating a storm of literary output that would be impressive for someone half his age. An updated edition of “The Superorganism,” his encyclopedic work on ants co-written with Bert Hölldobler, will be published in November. Dr. Wilson is at work on his first novel. He is preparing a treatise on the forces of social evolution, which seems likely to apply to people the lessons evident in ant colonies. And he is engaged in another fight.

Beneath his gentle manner and Southern charm, Dr. Wilson is a scrapper. He grew up in Alabama and Florida, where the local custom with respect to fistfights was that one could prevail or get knocked out, with no third option. “I never picked a fight,” he wrote in “Naturalist,” his autobiography. “But once started I never quit, even when losing, until the other boy gave up or an adult mercifully pulled us apart.”

More here. (Note: Being a diehard myrmecophile and a great admirer of Dr. Wilson, I can safely say that his Pulitzer Prize winning book on ants is one of the best things I have ever read since it radically changed my view of life in general and cancer in particular).

How do harmony and melody combine to make music?

Dmitri Tymoczko in Seed Magazine:

17bigidea368For a thousand years, Western musicians have endeavored to satisfy two fundamental constraints in their compositions. The first is that melodies should, in general, move by short distances. When played on a piano, melodies typically move to nearby keys rather than take large jumps across the keyboard. The second is that music should use chords (collections of simultaneously sounded notes) that are audibly similar. Rather than leap willy-nilly between completely unrelated sonorities, musicians typically restrict themselves to small portions of the musical universe, for instance by using only major and minor chords. While the melodic constraint is nearly universal, the harmonic constraint is more particularly Western: Many non-Western styles either reject chords altogether, using only one note at a time or build entire pieces around a single unchanging harmony.

Together these constraints ensure a two-dimensional coherence in Western music analogous to that of a woven cloth. Music is a collection of simultaneously occurring melodies, parallel horizontal threads that are held together tightly by short-distance motion. But Western music also has a vertical, or harmonic, coherence. If we consider only the notes sounding at any one instant, we find that they form familiar chords related to those that sound at other instants of time. These basic requirements impose nontrivial constraints on composers–not just any sequence of chords we imagine can generate a collection of short-distance melodies. We might therefore ask, how do we combine harmony and melody to make music? In other words, what makes music sound good?

More here.

Unorthodox Sex in the Animal Kingdom

Emily V. Driscoll in Scientific American:

Screenhunter_10_jul_15_1140Two penguins native to Antarctica met one spring day in 1998 in a tank at the Central Park Zoo in midtown Manhattan. They perched atop stones and took turns diving in and out of the clear water below. They entwined necks, called to each other and mated. They then built a nest together to prepare for an egg. But no egg was forthcoming: Roy and Silo were both male.

Robert Gramzay, a keeper at the zoo, watched the chinstrap penguin pair roll a rock into their nest and sit on it, according to newspaper reports. Gramzay found an egg from another pair of penguins that was having difficulty hatching it and slipped it into Roy and Silo’s nest. Roy and Silo took turns warming the egg with their blubbery underbellies until, after 34 days, a female chick pecked her way into the world. Roy and Silo kept the gray, fuzzy chick warm and regurgitated food into her tiny black beak.

Like most animal species, penguins tend to pair with the opposite sex, for the obvious reason. But researchers are finding that same-sex couplings are surprisingly widespread in the animal kingdom. Roy and Silo belong to one of as many as 1,500 species of wild and captive animals that have been observed engaging in homosexual activity.

More here.

Monday, July 14, 2008

Late Night Science: The Once and Future Prince of Dwarves

by Jason S. Bardi

Approaching 1:00 a.m. on Monday morning, I am wondering if I will get my first blog post finished (’twas due 45 minutes ago). I have that desperation that anyone who is up past midnight has, and because of this, coupled with the fact that the story I am telling concerns a discovery also made past midnight, I am dedicating this column to all the artists, writers, scientists, and other crazy creative people who stay up late troubling over great things.

This is the story of Planet Ceres, the Prince of Dwarves. You may have heard Ceres’ name mentioned about a month ago, when the brouhaha over Pluto’s status erupted again. I am not going to say much about Pluto other than to point out the obvious: its drama is a human drama and has very little to do with the planet itself. Pluto is an inanimate object. It hurtles out there, beyond the orbit of Neptune. It lies so far away from fickle human categorization that even if it had consciousness, a personality (“that Pluto’s a hellofa guy”), it would be safely immune from hurt feelings. Pluto has no personality. It is a rock. How could it care what happens here on Earth?

We humans care a great deal. The big news, about a month ago, was that Pluto was reclassified again. Once a planet, it had been classified a dwarf planet two years ago. This story got an overwhelming media response. Then in June it was reclassified as a “plutoid.” This time around, the story also garnered a fair bit of media attention — if for no other reason than many reporters seem amused that the chosen name was plutoid. “Such a (not) graceful term,” declared MIT’s Knight Science Journalism Tracker, which also summarized the major coverage of the event in the wires and dailies. See here.

ABC’s Ned Potter summed it up well in his blog when he said: “The goal of science is to understand and categorize the universe, and new categories are needed as our understanding of the universe changes…”

“But…Plutoid?”

This is not the story of Pluto. Instead, this is the story of another rock caught in the renaming game — one much closer to earth and with an interesting history of its own.

What you may have heard about Ceres is what the IAU said in its official Pluto release. “The dwarf planet Ceres is not a plutoid,” the release says, “as it is located in the asteroid belt between Mars and Jupiter.” (Plutoids are objects further than Neptune).

What you may not have read about Ceres is how it was discovered there, between the orbits of Mars and Jupiter, more than 200 years ago. By the way, this story is an excerpt (including extensive unused material) from my forthcoming book The Fifth Postulate (Wiley, 2008). Pre-order your copy on Amazon today!

With no further ado, here is a story I like to call:

The Once and Future Prince of Dwarves

Ceres_dumas_300One of the greatest discoveries of the nineteenth century was also perhaps its earliest. It was just after midnight on New Year’s Day 1801, and an Italian monk and astronomer named Giuseppe Piazzi was up late searching the skies from his rooftop observatory in Palermo, Sicily. He saw something that night that would change his life forever. Peering through his telescope, he spotted an object, watched it for several nights, carefully recorded its location as it traversed the sky, and eventually lost track of it.

Piazzi wasn’t sure what he was looking at. Was it a comet? His letters indicated that he thought it could be—perhaps a comet without a tail. He hoped, though, that it was something else, something “better than a comet,” as he wrote. What exactly qualifies as better-than-comet status? Just what Piazzi was intending to find: a new planet.

Finding a new planet was, in fact, one of the great scientific quests of the day. It was a completely new and exciting endeavor, and Piazzi and others were not just looking for any new planet. They were looking for the “missing” planet. The ancients knew of only five planets other than Earth — Mercury, Venus, Mars, Jupiter, and Saturn. But the scientific world had been turned on its head in 1781 when William Herschel at his private observatory in Bath, England, spotted something he thought could be a star or a comet. It turned out to be the new planet Uranus.

This raised the possibility that there might be even more undiscovered planets in the solar system. J. D. Titus and J. E. Bode gave this possibility a firm theoretical basis by forwarding an idea that there logically must be a planet between Jupiter and Mars. The basis of their claim was their observation that the six known planets followed an orderly, even spacing, thus suggesting that all the planets should be so spaced. But the gap between Mars and Jupiter was about twice what would be predicted by their theory. The emptiness was deafening.

By the turn of the eighteenth century, astronomers had been looking for a planet between Mars and Jupiter for several years, and the search was heating up. Baron Franz Xaver von Zach, the court astronomer at Gotha, began a formal, systematic search involving a team of astronomers. Piazzi, in his observatory in Sicily, was one of a group of twenty-four astronomers in Europe who made up this team. With such a large force of astronomers gearing up to look for the missing planet, Piazzi must have been surprised when he hit pay dirt quickly that New Year’s Day, spotting his object in orbit around the sun between Mars and Jupiter, exactly where the missing planet should have been.

Piazzi continued to track the object as long as he could, but he became ill on February 11, presumably from too many sleepless January nights exposed to the elements. In any case, the object passed behind the sun, and he lost sight of it. Piazzi had already sent letters that January to the directors of the observatories in Paris, Berlin, and Milan, telling them that he had discovered a small comet with no tail—or something—and giving them the coordinates. By then, Piazzi had decided to presumptively name his object. He called it Cerere Ferdinandea, combining the names of a Roman goddess of the harvest with his own Sicilian king. We know this object by its more common name: Ceres. In one of the letters, he was bold enough to suggest that it might be a planet.

Ceres_compar_300By that summer, word had gotten around. The discovery was announced with excitement in a long article in a leading German astronomy journal edited by Baron von Zach. This was “a long supposed, now probably discovered, new major planet of our solar system between Mars and Jupiter,” wrote von Zach.

For the discovery to be meaningful, however, this mysterious new planet had to be located again. The only problem was, nobody knew exactly where to find Ceres. It had disappeared, and this started one of the great hunts in the history of astronomy. Astronomers, professional and amateur alike, began scanning the skies with telescopes to locate the mysterious new rock — all without success. Ceres was still there, of course, rounding its way around the sun. But where?

This was a wonderful problem in applied mathematics. Mathematics alone could (and eventually would) locate the planet if it could be used to compute Ceres’s orbit. Then, given the orbit of Ceres, astronomers of the day could locate the missing planet by simply searching along the path where they knew it should be. But how could mathematicians determine the orbit?

Perhaps the easiest way, in theory, would be to chart enough of it—making careful observations of its exact location in the sky night after night as it made its journey around the sun. If you were able to observe enough positions of Ceres on enough nights, and if you were able to record the observations, you would have enough of a plot of its actual orbit to be able to fill in the gaps.

What if all you had was enough data to fill one tiny gap? How could you determine the orbit of Ceres if there was only a limited amount of available orbital data? This was exactly the situation in which mathematicians and astronomers found themselves in 1801. Piazzi had carefully recorded the position of Ceres on several nights over a period of forty-one days from his observatory in Sicily.

Many astronomers of the day reasoned that it would still be possible to calculate the entire orbit from these observations. They could estimate its orbit, and from that they could determine where Ceres should be by calculating how far it would have traveled since Piazzi last saw it. One would then have to simply point a telescope to the location farther along this path where it should be.

With that in mind, an astronomer named Johann Karl Burckhardt used the tools of “celestial mechanics” as they were known and published a preliminary orbit of Ceres in July. In September von Zach published the complete set of observations made by Piazzi. They were both hopeful that this would be enough. It was not.

The difficulty was that prior to the discovery of Ceres, celestial mechanics had only been successfully applied to predicting the orbits of comets. Comets are much brighter than planetary bodies and may be visible for a longer period of time on their approach to the sun. They are easier to handle, in other words. Ceres is not bright enough to be visible to the naked eye, so it had to be spotted with a telescope. This greatly limited the area of the sky that could be systematically searched.

Computing the orbit of Ceres was exceedingly difficult because recording observations taken over just a few weeks only gives you a few closely spaced points on the overall path of the object around the sun. Such a small piece of the orbit confounded any attempt to extrapolate the entire orbit because small errors in the observations could have massive effects on the overall calculation.

A month after Baron von Zach published Piazzi’s full set of observations, he reported the sad news that several astronomers had been looking for Ceres in the previous two months without success. Burckhardt’s efforts to plot the orbit had failed. Such was the desperate state of affairs when the Ceres data reached Gauss sometime in the fall of 1801.

Gauss was not an astronomer in the regular early-nineteenth-century sense. He had neither telescope nor observatory. But, being adept at pushing pencils around on a desk, he was perfectly suited to tackle this problem. In 1801, when Ceres swept across Gauss’s radar, he pushed everything else aside, picked up his pencil, and went to work.

“Could I ever have found a more seasonable opportunity to test the practical value of my conceptions, that now employing them for the determination of the orbit of the planet Ceres, which after the lapse of a year must be looked for in a region off the heavens very remote from that in which it was last seen?” Gauss wrote.

By November 1801, he began making notes on the problem, and by the end of the month he had solved it, working out a solution to a system of seventeen equations that predicted where Ceres would be. He communicated his calculated orbit to von Zach, and in December von Zach published the predicted orbit, writing, “Great hope for help and facilitation is accorded to us by the recently shared investigation and calculation of Dr. Gauss in Brunswick.”

By then, astronomers were already searching the skies for Ceres, looking where Gauss predicted it would be. Winter weather being what it was, they were not immediately successful. On December 7, however, von Zach located the planet almost exactly where Gauss predicted it would be, as Gauss himself wrote, on “the first clear night, when the planet was sought for as directed by the numbers deduced from it, restored the fugitive to observation.”

The secret to Gauss’s success was a technique he invented called the method of least squares, which is a way of minimizing the error of observations. The problem, as Gauss saw it, was to determine the orbit by finding a curve that corresponded with the observed data and then correct the curve to find the best fit. The method of least squares helps by approximating an orbit based on the few observations and then improving, or “fitting,” the orbit to the data. The fitting works by minimizing the differences between the observed and computed points in the orbit multiplied by themselves (thus “least squares”). It was a simple but remarkable discovery.

The truly remarkable thing about Gauss, though, is that when he invented the method of least squares, he didn’t think much of it. He didn’t even bother to publish it because it was so obvious to him that he was convinced some other mathematician had surely thought of it already! In fact, other mathematicians did develop the method of least squares independent of Gauss, including the French mathematician Adrien-Marie Legendre, who was also the first to publish the method and was subsequently recognized as its inventor.

Gauss was overjoyed about the rediscovery of Ceres, and his enthusiasm was echoed by dozens of his contemporaries, many of whom had been trying to do just what he had done. In his overly humble way, he was careful not to promote himself too aggressively, and he credited much older mathematicians like Isaac Newton for working out the theoretical foundations upon which he laid his mathematical prediction.

Nevertheless, the calculation launched Gauss to fame and elevated him to a stature on a par with the top astronomers in Europe. When Alexander von Humboldt returned to Europe from the United States in 1804, he went immediately to Paris, cosmopolitan capital that it was. There he was impressed to find a name of a young German mathematician mentioned over and over as one of the great geniuses of the day.

Gauss’s rediscovery of Ceres had a profound effect on his personal and professional life. He soon gained membership in numerous scientific societies, and by the time he died, he would be a member of all the major societies in Europe. He began to spend more and more time on astronomical observations, carefully following planets and comets and watching eclipses. On many nights during the next half century, he could be found late at night observing the stars through his telescope and taking measurements with his sextant and recording all. He named his firstborn son Joseph, after Piazzi.

Ceres, on the other hand, did not fare so well.

Astronomers were astonished by the discovery of a similar object they called Pallas a few months later. Two years after that another, named Juno, was spotted. All three were in orbit around the sun at approximately the same distance. Yet another object like them, called Vesta, was discovered soon thereafter.

These discoveries had a tremendous effect on popular astronomy. Some would watch the skies for years afterward, hoping to make a similar discovery. All of this was in vain. It was decades before more of these objects were discovered. They were not really planets at all, but object we would have called asteroids, a word that the astronomer William Herschel coined because objects like it appeared like stars in his telescope.

In the second half of the nineteenth century, astronomers began spotting them in droves—hundreds more by the end of the century. A single photograph taken in 1900 revealed five entirely new ones. By the early twentieth century, there were so many known asteroids that they were regarded as dull curiosities or worse—annoyances. They stood in the way of observations of distant solar systems and were themselves uninteresting.

Later in the twentieth century this changed again. Asteroids are now the focus of important geological questions because they are representatives of the early solar system. Ceres is a special example of this. It was formed within ten million years or so after the birth of the solar system. It is a throwback to an earlier time in the solar system—a primordial planetoid 600 miles in diameter. It is a remnant of the cloud of matter that collapsed and formed our solar system nearly five billion years ago.

Perhaps Ceres was inappropriately named. In ancient myth, Ceres was the Roman goddess of plants, but there is nothing organic about her namesake. It is a rock and nothing more, with no atmosphere and no life. Ceres is smaller than the Earth and much smaller than Jupiter and the other giant planets, and smaller even than the moons scattered throughout the solar system. Ceres and the rest of the objects in the asteroid belt never really had a chance to pull together because of the gravity of the solar system. Blame Jupiter, the biggest of the planets and gravitationally speaking the most influential. Ceres and the other thousands of asteroids were caught between the gravitational pull of it and the sun.

Ceres is similar to the icy moons of the outer planets. Its diameter is about a quarter that of Earth’s moon, and it circles the sun in 4.6 years. What is most interesting about Ceres is that it is the planetary equivalent of a wooly mammoth frozen in the ice. It may still contain some of this primordial ice. Studying it may give insight into the formation of our own planets and our neighbor planets.

Appreciation of Ceres grew again in the last quarter of the twentieth century because of this possibility. The asteroid belt is something like an astronomical archive, and two of its most ancient and valuable tomes are Ceres and Vesta. These two asteroids have remained intact since the dawn of the solar system 4.5 billion years ago, escaping severe damage by collisions with other protoplanets. NASA now has a mission called the DAWN spacecraft that will reach Ceres around 2015. See the NASA Fact Sheet.

Screenhunter_08_jul_14_1229DAWN uses a flashy technology called an ion drive that relies on charging ions of the element xenon and then firing them out of the back of the engine. This provides very little thrust, and on Earth such an engine would be ineffective against the friction of our atmosphere. But in space, the ion engine can slowly accelerate the satellite for months. DAWN has solar sails, ion thrusters fueled by 400 kilograms of xenon, a satellite dish, cameras, and a payload of scientific equipment, such as infrared and gamma-ray spectrometers, that will map the surface, search for water, and determine the chemical and mineral compositions of the asteroids. Scientists hope to understand some of the processes that were taking place in the earliest days of the solar system, such as the role of water.

Now back to Pluto. Even before DAWN was launched in 2007, the status of Ceres was under consideration when the International Astronomical Union (IAU) set up a committee that would decide on the criteria that defines a planet. Possible definitions rely on the size, orbit, and uniqueness of the orbit. Under these criteria, Ceres was not set to be reconsidered as a planet. The real deliberations were over whether or not Pluto should be given planet status.

Pluto had been declared a planet when it was discovered some seventy-five years ago, but at that time nobody had defined what a planet was. Size alone will not cut it. Judging by size, the Earth’s moon is bigger than Pluto. So are the two largest moons of Saturn and Jupiter. So is Neptune’s moon Triton. In its report, the IAU defined a planet as anything spherical, revolving the sun, and larger than 2,000 kilometers across. Under this definition Pluto would be a planet, but then so would a nearby object discovered in 2003. Some advocated on Pluto’s behalf. Others dismissed it outright. Some suggested waiting. But waiting was the last thing on the agenda, because the confusion had created something of a backlog of small objects that could not be named until astronomers knew what naming convention to use.

Unfortunately for Pluto, planets are not named by organizations like the IAU on the basis of popular culture or history. The stage was set for a showdown at the Twenty-sixth General Assembly of the International Astronomical Union in August 2006. The matter was simply referred to the entire IAU membership, and the IAU declared Pluto and Ceres dwarf planets.

What is next for Ceres? Right now nothing. Ashley Yeager from Science News reports that if objects similar to Ceres are detected, they will be named Ceroids.

For now, the last word belongs to the International Astronomical Union release says, “Current scientific knowledge lends credence to the belief that Ceres is the only object of its kind. Therefore, a separate category of Ceres-like dwarf planets will not be proposed at this time.”

Among the asteroids, Ceres is the only dwarf planet, which makes it the king of the asteroids. And among the dwarves, it is unique — a prince. There seems to be no other object like it in the solar system, and I look forward to 2015, when the Prince of Dwarves begins to yield secrets of itself and perhaps the earliest days of the solar system.

Further Reading:

– G. Waldo Dunnington, Gauss: Titan of Science (Washington, DC: Mathematical Association of America, 2004).

– C. T. Russell et al., “DAWN: A Journey to the Beginning of the Solar System,” www.ssc.igpp.ucla.edu/dawn/pdf/ACMConferencePaper, last visited May, 2007.

– Donald A. Teets and Karen Whitehead, “The Discovery of Ceres: How Gauss Became Famous,” Mathematics Magazine 72 (April 1999);

– W. K. Bühler, Gauss: A Biographical Study (Berlin: Springer-Verlag, 1981)

Barack is Black: That’s a relief!

by Ram Manikkalingam

BarackobamamotherThe US is a strange place. How you look really matters. Of course it matters everywhere else too. The clothes you wear, the way you wear them, your hairstyle or lack of it, your shoes and the bag you carry, all of these make a difference wherever you live. But, in the US, the colour of your skin, the shape of your nose and the way your hair curls, really really matters. Now the US is not the only place where lighter skin is considered better than darker (Indian magazines are full of skin whitening advertisements), or the wave of your hair or the shape of your nose is a focus of hairstylists and plastic surgeons. But in the US all this matters in a different way. It suggests not just social ideals of beauty or the social pressure to conform to particular aesthetic and stylistic sensisbilities associated with particular settings – it also indicates where you come from geographically and where your station might be in society and how society ought to treat you.

I observe this difference about the US, when I show photos of my family to my US friends, particularly the white ones. My brothers and sisters vary in shape, size and colour (and yes I am sure we have the same parents who are both Tamil from Sri Lanka). These friends invariably comment on how “racially” different members of my family appear. My brother could be southern European or middle eastern, some of my sisters central Asian, I could be African, another sister very South Asian etc. Those who are not from the US simply express how different we look. And those who are from the US use racial and ethnic categories to describe this difference.

In the American street (as Thomas Friedman would say) I am Black. And we know that in the US they treat you very differently if you are Black than if you are White. Brothers –- from the businessmen to the homeless — acknowledge me on the streets. When I ask for directions from a White person (not all) and I am wearing my sweatshirt, jeans and trainers –- they sometimes speak slowly and enunciate clearly how to go from one subway station to another -– just in case I do not understand. Don’t get me wrong –- nobody is rude to me. Nobody quite ignores me when I make a request. It is just that they treat me so differently on the streets of the US from how they treat me when I present a paper or give a lecture at a seminar, or in other professional settings that it is hard not to notice it. There they put me in a completely different category. They know my name and hear how I speak and suddenly I am not Black anymore. I become a South Asian academic.

Black, White or Foreign?

Barack isn’t Black enough – say some. And he is too Black say others. Or at least this is how his political dilemma is described. He needs to appeal to Whites without alienating Blacks. And his Blackness, particularly after the Jeremiah Wright episode, is viewed as a political challenge he needs to overcome in a racially divided America, because the Republicans will use a series of coded attacks, beginning with Jeremiah Wright’s sermon, as a more subtle and updated version of Willie Horton, to make Obama the Black candidate. And Obama’s strategy must be to avoid that label and become the candidate of both, if not all, racial groups. This anyway is how the racial tightrope that Obama needs to walk is usually described by pundits.Pg02 Although he has run his race this way, I am not so sure it will continue to work as well for him in the future. Because the more successful he is at avoiding becoming either the Black or the White candidate, the more easily he can be made into the foreign candidate. After all, if you are American you’ve gotta be Black or White. So if you are neither Black nor White, you can’t be American.

Obama ran a successful post-racial campaign in a US that is not post-racial. He ran that for three reasons. The first is a pragmatic political one. As a Black candidate in what is still a White majority America, he cannot win as the Black candidate. The second is a moral one – ultimately for the US to have racial justice they also need to get beyond race –- both as a basis for discrimination and as a basis for redress — to a world where race matters less. And finally he was able to run a post-racial campaign for personal reasons -– his mother is White American and his father is a Black Kenyan . But Obama’s success at running a post-racial campaign in what is perceived as a racial US has made it easier for his opponents to portray him as foreign.

Screenhunter_09_jul_15_1119So this group of Americans (mainly White) are wary of him, not because he is too Black (or not Black enough), but because they link his not being quite Black or White to his foreignness – giving his antecedents a whiff of suspicion. In an extreme version, Obama to them becomes the Gay, Muslim candidate born in Africa, (it would be great if he were, except that he would not be able to legally run for President) ,not the post racial candidate of White-Black African-American ancestry. With this group being more Black may actually help, not hurt, Obama. Because whatever else White Americans have said about Blacks over the years –- even the most racist ones –- have never accused them of not being American. And I am optimistic enough to believe that an overwhelming majority of White Americans will vote for a Black candidate. His success as a candidate to date reflects this.

Perceptions

Nature_series_no_102_2004

Liang Shaoji. Nature Series No 102. 2004.

In a large warehouse space in Shanghai, 31 miners’ helmets rest symmetrically arrayed on a concrete floor, illuminated solely by the light of their own headlamps, and swathed in a web-like film of raw silk. The filtered industrial glow exudes pensive melancholy, a difficult feat to achieve in the midst of one of the world’s fastest growing metropolises.

More here, and here.

Michael E. DeBakey, 1908-2008

by Syed Tasnim Raza

MichaeldebakeyMichael E. DeBakey died on July 11, 2008 of natural causes, just two months short of his 100th birthday. He was a pioneering, innovative, and world-renowned cardiovascular surgeon, whose surgical career spanned close to 70 years. While his name is most associated with Methodist Hospital of the Baylor College of Medicine in Houston, Texas, his career began at Tulane University in New Orleans in the late 1930s. It is at Tulane that he first described surgery for aortic aneurysms (ballooning of the aorta secondary to atherosclerosis) by cutting out the enlarged portion of the aorta and replacing it with a tube made out of Dacron. This operation has been performed millions of times throughout the world since then with great success.

Dr. DeBakey also described surgical treatment of another condition affecting the aorta, so-called aortic dissection, in which case the inner layer of the aorta (the intima) is torn, thus letting blood enter between the inner and outer layers, and as this condition progresses it shuts off the origins of major arteries coming off the aorta, causing stroke, heart attack, kidney failure and death if it remains untreated in a vast majority of patients. The classification of aortic dissection is named after DeBakey (DeBakey Types I, II and III). In December 2006, Dr. DeBakey himself suffered from Type I aortic dissection himself. He was 97 at the time and refused surgery due to his advanced age. But as the condition progressed he went into a coma and his wife and a long time associate, George Noon, asked for surgery to be performed against his expressed wish. The Ethics Committee of the hospital met, and in a controversial decision, permitted the operation to be performed, which was successful, although the recovery was complicated and he was hospitalized for over eight months, at a cost of over a million dollars. He fully recovered and remained active until his death.

Heart surgery was developed during the 1940’s, ‘50’s and ‘60’s in Boston, Philadelphia, Baltimore, and Minneapolis and Rochester in Minnesota. Dr. DeBakey, while working independently and outside of those major centers, made significant contributions in this field also. The heart lung machine was developed by the pioneering efforts of John Gibbon in Philadelphia and first used there in 1952, but it was the roller pump invented by DeBakey as a senior medical student in 1939, which made it much more useable and widely applicable after late 1950’s. Rene Favalaro, a Brazilian surgeon working at the Cleveland Clinic in Ohio, developed coronary artery bypass operation in 1967 using the saphenous veins from the legs to bypass obstructed coronary arteries in the heart. It turns out that Dr. DeBakey had successfully done this operation as a desperate measure in a patient who could not be weaned off the heart lung machine in 1964 in Houston, but did not report it at the time. It was eventually reported in 1974. Dr. DeBakey developed the first ventricular assist device (VAD), a mechanical pump which can support the heart for weeks or months, 300 of which have been implanted in humans, and newer versions of his device are still being used.

During the Second World War, Dr. DeBakey proposed that surgeons and nurses be deployed on the front lines with army units for providing immediate care to the injured, thus avoiding delays of evacuation to army hospitals. These became the M.A.S.H. units in the Korean war.

Another area in which Dr. DeBakey contributed greatly was making the Baylor College of Medicine and the Methodist Hospital in Houston one of the great medical education and research institutions in this country. At one time or the other he served there as the Chief Cardiovascular Surgeon, Chairman of Surgery, director of Cardiovascular Center, President of the hospital and Chancellor of the college. He took great pride as a teacher of surgery and trained hundreds of heart and vascular surgeons who are practicing throughout the world. He was known to be very demanding of the residents (though very charming to the patients and medical students), so much so that there are stories about his having slapped a resident on morning rounds, for having missed some minor point.

Another story which circulates among heart surgery residents is that a patient died just before morning rounds and no one wanted to break the news to Dr. DeBakey, so the patient was covered over by a sheet and Dr. DeBakey was told that there was no change in his condition, and they moved on. Another story about his dedication to surgery involves his first wife who died in 1972. Dr. DeBakey was operating when some one came in the room to give him the news. He asked not to be disturbed while he was operating and finished his day’s schedule at 7:00 PM, at which time he asked what was so urgent that could not wait for him to finish! Even if there is partial truth to these stories, they have circulated in the surgical circles for so long that most of us take them as true, since they do reflect his personality. By the time he retired in his late 80’s, DeBakey had performed over 60,000 operations! His former trainees have formed the highly prestigious Michael E. DeBakey Surgical Society.

Dr. DeBakey received numerous awards throughout his long career, including the Lasker Award, United Nations Lifetime Achievement Award, Presidential Medal of Freedom with Distinction, The National Medal of Science, Congressional Gold Medal and at least 38 other major awards form various professional medical associations and societies. I first met and heard Dr. DeBakey during my residency training in Buffalo where he came to receive the Roswell Park Gold Medal, an award given by the Buffalo Surgical Society annually to a distinguished surgeon. At that meeting Dr. DeBakey told us that he had interviewed for the position of Chairman of Surgery at the Buffalo General Hospital in 1963, but then decided to stay on in Houston! The last time I heard Dr. DeBakey was in 2000, when he was 92, still vigorous and active, and was given the American Association of Thoracic Surgery Lifetime Achievement Award.

The greatest protégée DeBakey produced was Denton Cooley, a surgeon originally trained under Alfred Blalock in Johns Hopkins Hospital, who then joined DeBakey in Houston. Within a few years Cooley broke from DeBakey and opened a competing heart center, the Texas Heart Institute, across the street form the Methodist Hospital. The two centers competed vigorously and both became internationally recognized centers of excellence.

Once when Dr. DeBakey was out of town, Dr. Cooley stole an early version of an experimental ventricular assist device from Methodist and implanted it in one of his patients. Dr. Cooley to this day says he did it as a desperate measure to save his patient’s life, Dr. DeBakey says he did it to be the first to implant a VAD! This became a national scandal and Dr. Cooley was censured by the American College of Surgeons. The two did not speak after that and feuded publicly at professional society meetings. Finally after 40 years of this widely reported feud last year the Denton Cooley Cardiovascular Surgical Society gave Dr. DeBakey a Lifetime Achievement Award, and with urgings from mutual friends, Dr. DeBakey agreed to attend the meeting. There he finally shook hands again with his long-time nemesis.

Michael Ellis DeBakey was born in New Orleans to Shaker and Raheeja Dabaghi (Anglicized to DeBakey), Maronite Christians from Lebanon, who immigrated to the United States because of religious persecution back home. He was one of five children and credits his parents for inculcating in him the values of education and hard work and service to others, which led him to his successful career. Dr. DeBakey is considered one of the greatest surgeons of the last century. His name will live on in many patient’s hearts, on many buildings and departments in Houston, with the work of hundreds of his trainees, and in his numerous publications and the devices that he developed, for many years to come.