Can Evolution Run in Reverse? A Study Says It’s a One-Way Street

Carl Zimmer in the NYT:

Evolutionary biologists have long wondered if history can run backward. Is it possible for the proteins in our bodies to return to the old shapes and jobs they had millions of years ago?

Examining the evolution of one protein, a team of scientists declares the answer is no, saying new mutations make it practically impossible for evolution to reverse direction. “They burn the bridge that evolution just crossed,” said Joseph W. Thornton, a biology professor at the University of Oregon and co-author of a paper on the team’s findings in the current issue of Nature.

The Belgian biologist Louis Dollo was the first scientist to ponder reverse evolution. “An organism never returns to its former state,” he declared in 1905, a statement later dubbed Dollo’s law.

To see if he was right, biologists have reconstructed evolutionary history. In 2003, for example, a team of scientists studied wings on stick insects. They found that the insects’ common ancestor had wings, but some of its descendants lost them. Later, some of those flightless insects evolved wings again.

Yet this study did not necessarily refute Dollo’s law. The stick insects may indeed have evolved a new set of wings, but it is not clear whether this change appeared as reverse evolution at the molecular level. Did the insects go back to the exact original biochemistry for building wings, or find a new route, essentially evolving new proteins?

dying satyr

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The fiction of Richard Powers sometimes resembles a dying satyr—above the waist is a mind full of serious thought, philosophical reflection, deep exploration of music and science; below, a pair of spindly legs strain to support the great weight of the ambitious brain. Powers thinks, and thinks well, and his almost nostalgic devotion to the European modernist tradition of “The Magic Mountain” and “The Man Without Qualities” makes him rare in American fiction. In his best books, “The Gold Bug Variations” (1991) and “Galatea 2.2” (1995), he displays an impressive command of the languages of music, genetics, computer science, and neurology, but more exciting is his willingness to engage in abstract thought, to argue and persevere, to carry arguments through the rooms of logic. (“The Gold Bug Variations,” in particular, contains several profound essays on Bach.) Contemporary American novelists, compared with Powers, can seem like intellectual visitors, fiddling in the foyers of the mind.

more from James Wood at The New Yorker here.

baldessari!

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Once upon a time the young John Baldessari was so desperate for images that he prowled back alleys hunting for discarded photographs. He’d climb into garbage bins (diving head first was never the recommended technique) and rummage around, finding curious rejected pictures of odd male bowlers (something about what their hands revealed in the follow-through) or stiff ceremonial group portraits of beaming Caucasians with faces revealing their true jack-o-lantern selves, or a stack of dead bodies, or – simply and remarkably – a photograph of a standing man in a black suit which would eventually be cropped and tilted on its side and positioned at the bottom of a horizontal stack of other men – soldiers, cowboys, etc. – all of whom appear to have been shot dead in the street. The solitary living man in the black suit is on the bottom tier, facing up.

more from Benjamin Weissman at Frieze here.

Shrink the army and expand the police in Pakistan

S. Abbas Raza in Dawn:

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The present danger to Pakistan comes from the lawlessness and terrorism in the country and the government’s inability to effectively project authority and guarantee the safety of its citizens. Islamic jihadist organisations with foreign funding appear to have joined hands with the Taliban and their sympathisers to wreak havoc in the country with their ultimate retrograde dream of creating a mediaeval society where a draconian interpretation of the Sharia is enforced, women kept as chattel and modernity and progress defeated.

Some of these groups are determined to attack and intimidate, if not eliminate, religious minorities. Then, we have the heavily armed militias affiliated with political parties. Finally, there are the criminal gangs involved in drug trafficking, kidnapping, carjacking, extortion, armed robbery and murder.

The idea that the army can somehow defend the country against this lawlessness is ludicrous. How can the armoured corps help fight sectarian car-bombings in Karachi? How will yet another squadron of F-16 aircraft defeat the drug smugglers in Lahore? How does the infantry do the detective work necessary to bring kidnappers and carjackers to justice? How can the army deal with the creators of mayhem that are thoroughly dispersed within our population, in every town and every city? It cannot. Yet the armed forces consume a hugely disproportionate share of Pakistan’s federal budget.

More here.

Wednesday Poem

Black Bears

Up from the creek
where a shut-in
neighbor diligently
keeps vigil
and says
a mink and otter
can still be seen
and native brook trout
cross breed with the stocked
come black bears
first one and then a second
pass by my window
silent as ghosts
not a leaf disturbed
not even rousing the dogs
head swaying
moving with secret purpose
between houses
through the yards.

Who knows what else appears
while others are off to work
or the gym
and gardens are left
to browsing deer
also emerging lightly
with the resurrected
from the soft Indian
summer fog
settled along
the creek
wisps drifting
to my window
with the ghost bears
carrying
droplets glistening
on black fur.

By Harry Walsh
September 2009

Lashkar-e-Tayyaba Still Robust After Mumbai Siege

Lydia Polgreen and Souad Mekhennet in the New York Times:

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India and Pakistan have fought three wars since they were created by the bloody partition of British India in 1947. Whether they begin again the long journey toward peace or find themselves eyeball to eyeball, nuclear arms at the ready, depends in no small measure on the actions of this shadowy group.

A new attack could reverberate widely through the region and revive nagging questions about Pakistan’s commitment to stamp out the militant groups that use its territory.

It could also dangerously complicate the Obama administration’s efforts in Afghanistan. Success there depends in part on avoiding open conflict between India and Pakistan, so that Pakistan’s military can focus on battling the Taliban insurgents who base themselves in Pakistan.

Even so, American diplomatic efforts to improve India-Pakistan relations have been stillborn. So delicate is the Kashmir issue that Indian officials bridle at any hint of American mediation.

More here.

A history of the English marriage

From The Telegraph:

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In the 1950s, a Royal Commission identified as the single most important factor in marital breakdown the idealisation of the individual pursuit of sexual gratification and personal pleasure at the expense of a sense of reciprocal obligations and duties towards spouses, children and society as a whole. Not only did our ancestors know that they had to work at their marriage because there was no easy escape, but they saw the family as a microcosm of society, whose good order would contribute to the whole. Adulterers were severely and publicly punished – theoretically by death during the Commonwealth in the 1650s – because they had brought down God's wrath on the whole of society.

Adultery, nevertheless, was rife in a society where arranged marriages between couples who had barely met were the norm among the propertied class and divorce was impossible, except for the tiny elite who could afford a parliamentary divorce. Today, adultery often leads to divorce and remarriage, but in the past there was no such option. Marriage was for life, but then how long was life? Most marriages were cut short by death with the average marriage lasting eleven years, roughly the same figure as today when it is more likely to be terminated by divorce than death.

More here.

For the Faithful, Eusociality

From Science:

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As social as humans are, their cooperative nature pales in comparison to that of ants, bees, wasps, and termites (see hill, left). Colonies of these insects can number in the millions and function seamlessly as “superorganisms.” In their book, The Superorganism: The Beauty, Elegance, and Strangeness of Insect Societies, Burt Hölldobler and E. O. Wilson point out that this way of life makes for very successful living. These insects represent a mere 2% of the insect species yet take up two-thirds of the insect biomass. In tropical rainforests, ants outweigh all the mammals and land vertebrates combined.

More here.

When Writers Speak

Arthur Krystal in the New York Times:

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That’s Vladimir Nabokov on my computer screen, looking both dapper and disheveled. He’s wearing a suit and a multibuttoned vest that scrunches the top of his tie, making it poke out of his shirt like an old-fashioned cravat. Large, lumpish, delicate and black-spectacled, he’s perched on a couch alongside the sleeker, sad-faced Lionel Trilling. Both men are fielding questions from a suave interlocutor with a B-movie mustache. The interview was taped sometime in the late 1950s in what appears to be a faculty club or perhaps a television studio decked out to resemble one. The men are discussing “Lolita.” “I do not . . . I don’t wish to touch hearts,” Nabokov says in his unidentifiable accent. “I don’t even want to affect minds very much. What I really want to produce is that little sob in the spine of the artist-reader.”

Not bad, I think, as I sit staring at the dark granular box on my YouTube screen. In fact, a damned good line to come up with off the cuff. But wait! What’s that Nabokov’s doing with his hands? He’s turning over index cards. He’s glancing at notes. He’s reading. Fluent in three languages, he relies on prefabricated responses to talk about his work.

More here.

Why I Slept with 1300 Women

Sebastian Horseley in Open:

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I remember the first time I had sex—I still have the receipt. The girl was alive, as far as I could tell, she was warm and she was better than nothing. She cost me £20.

I was 16 then and I’m 47 now. I have spent 25 years throwing my money and heart at tarts. I have slept with every nationality in every position in every country. From high-class call girls at £1,000 a pop to the meat-rack girls of Soho at £15, I have probably slept with more than 1,300 prostitutes, at a cost of £115,000.

I am a connoisseur of prostitution: I can take its bouquet, taste it, roll it around my mouth, give you the vintage. I have used brothels, saunas, private homes from the Internet and ordered girls to my flat prompt as pizza. While we are on the subject, I have also run a brothel. And I have been a male escort. I wish I was more ashamed. But I’m not. I love prostitutes and everything about them. And I care about them so much I don’t want them to be made legal.

More here.

asteroid plimpton

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There’s something special about naming a celestial body, putting your thumbprint in the heavens up there with Jupiter and Mars and the Horsehead Nebula. The idea speaks to our desire for immortality–attaching a name to something that, if not quite eternal, will last far longer than anyone will be around to remember. The world of commerce has figured this out, of course. Various services have arisen that claim to put your name on a star for a fee. Unfortunately, as nice as it sounds, these names don’t count: You pay your money and get a certificate, but it isn’t recognized by the only organization that actually matters, the International Astronomical Union. So what if you really do want to name a piece of the sky? Is there a way to name a newly discovered star, or planet, or comet–maybe not after yourself, but maybe after someone you admire?

more from Samuel Arbesman at The Boston Globe here.

I am an American woman

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Katja Nicodemus interviews Lars von Trier, originally in Die Zeit, over at Signandsight:

You seem to be fascinated by power relationships. With the Dogma rules, you formulated an aesthetic manifesto and your last two films “Dogville” and “Manderlay” are based on strict formal principles. What so interests you about guidelines and rules?

I come from a family of communist nudists. I was allowed to do or not do what I liked. My parents were not interested in whether I went to school or got drunk on white wine. After a childhood like that, you search for restrictions in your own life.

But communists actually have very strict rules.

That’s true, but that’s where things start to get very complicated. All my life I’ve been interested in the discrepancy between philosophy and reality, between conviction and its implementation. The general assumption is that all people are able to differentiate more or less equally between good and evil. But if this is the case, why does the world look like it does? Why have all the good intentions of my parents come to nothing. And why do my own good intentions lead to nothing?

The Return of John Maynard Keynes

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Paul Krugman reviews Robert Skidelsky’s Keynes: The Return of the Master in the Guardian:

In Part I of his 1936 masterwork, The General Theory of Employment, Interest, and Money, Keynes asserted that the core of his theory was the rejection of Say’s Law, the doctrine that said that income is automatically spent. If it were true, Say’s Law would imply that all the things we usually talk about when trying to assess the economy’s direction, like the state of consumer or investor confidence, are irrelevant; one way or another, people will spend all the income coming in. Keynes showed, however, that Say’s Law isn’t true, because in a monetary economy people can try to accumulate cash rather than real goods. And when everyone is trying to accumulate cash at the same time, which is what happened worldwide after the collapse of Lehman Brothers, the result is an end to demand, which produces a severe recession.

Some of those who consider themselves Keynesians, myself included, agree with what Keynes said in The General Theory, and consider the rejection of Say’s Law the core issue. On this view, Keynesian economics is primarily a theory designed to explain how market economies can remain persistently depressed.

But there’s an alternative interpretation of what Keynes was all about, one offered by Keynes himself in an article published in 1937, a year after The General Theory. Here, Keynes suggested that the core of his insight lay in the acknowledgement that there is uncertainty in the world – uncertainty that cannot be reduced to statistical probabilities, what the former US defence secretary Donald Rumsfeld called “unknown unknowns”. This irreducible uncertainty, he argued, lies behind panics and bouts of exuberance and primarily accounts for the instability of market economies.

Where Will Synthetic Biology Lead Us?

Synthbio

Michael Specter in The New Yorker:

“What if we could liberate ourselves from the tyranny of evolution by being able to design our own offspring?” Drew Endy asked, the first time we met in his office at M.I.T., where, until the summer of 2008, he was assistant professor of biological engineering. (That September, he moved to Stanford.) Endy is among the most compelling evangelists of synthetic biology. He is also perhaps its most disturbing, because, although he displays a childlike eagerness to start engineering new creatures, he insists on discussing both the prospects and the dangers of his emerging discipline in nearly any forum he can find. “I am talking about building the stuff that runs most of the living world,” he said. “If this is not a national strategic priority, what possibly could be?”

Endy, who was trained as a civil engineer, spent his youth fabricating worlds out of Lincoln Logs and Legos. Now he would like to build living organisms. Perhaps it was the three well-worn congas sitting in the corner of Endy’s office, or the choppy haircut that looked like something he might have got in a tree house, or the bicycle dangling from his wall—but, when he speaks about putting together new forms of life, it’s hard not to think of that boy and his Legos.

Endy made his first mark on the world of biology by nearly failing the course in high school. “I got a D,” he said. “And I was lucky to get it.” While pursuing an engineering degree at Lehigh University, Endy took a course in molecular genetics. He spent his years in graduate school modelling bacterial viruses, but they are complex, and Endy craved simplicity. That’s when he began to think about putting cellular components together.

What Have We Done to Democracy?

Arundhati Roy in The Nation:

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The question here, really, is what have we done to democracy? What have we turned it into? What happens once democracy has been used up? When it has been hollowed out and emptied of meaning? What happens when each of its institutions has metastasized into something dangerous? What happens now that democracy and the free market have fused into a single predatory organism with a thin, constricted imagination that revolves almost entirely around the idea of maximizing profit?

Is it possible to reverse this process? Can something that has mutated go back to being what it used to be? What we need today, for the sake of the survival of this planet, is long-term vision. Can governments whose very survival depends on immediate, extractive, short-term gain provide this? Could it be that democracy, the sacred answer to our short-term hopes and prayers, the protector of our individual freedoms and nurturer of our avaricious dreams, will turn out to be the endgame for the human race? Could it be that democracy is such a hit with modern humans precisely because it mirrors our greatest folly–our nearsightedness?

More here.