Today on New Scientist: 11 January 2013

Largest structure challenges Einstein's smooth cosmos

One-twentieth the diameter of the observable universe, a group of galaxies dents the cherished idea that the cosmos is uniform at large scales

Straitjacket drug halts herpes virus's escape stunt

Herpes infections recur as the virus is adept at evading our defences, but a new drug that suppresses enzymes exploited by the virus seems effective

Zoologger: Mouse eats scorpions and howls at the moon

Super-aggressive grasshopper mice are not put off by the deadly venom of the scorpions they feast on - in fact, nothing much seems to scare them

Sand tsunami pictured striking Australian coast

The spectacular wall of sand and dust appears to block out the sun like a giant wave

Astrophile: Zombie stars feed on Earth-like exoplanets

We can now learn what planets around other stars are made of - by looking at the atmospheres of white dwarfs that have swallowed up their worlds

Life will find a way, even in the midst of a hurricane

Not for the faint-hearted: to sample the microbiome of a hurricane, fly a jetliner through it

Physics not biology may be key to beating cancer

Billions of dollars spent on cancer research have yielded no great breakthrough yet. There are other ways to attack the problem, says physicist Paul Davies

Feedback: Return of nominative determinism

The last nominative determinism stories, salads of gizzards and his chestnuts, Australian graduates in outer space, and more

A comeback for virtual reality? Inside the Oculus Rift

The Oculus Rift promises an immersive gaming experience like no other. Niall Firth gets his head in the game and gives it a try

Is the US facing Flu-maggedon?

The US flu season has come early this winter, leaving many hospitals overwhelmed. But is the situation really any worse than usual?

Your body's insights into life and cosmos

The Universe Within by Neil Shubin tells stories from your body about our species, planet and universe. PLUS: a cautionary tale of inspirational scientists

Hands on with Leap Motion's gestural interface

The makers of the ultra-precise gestural interface talk big about killing off the mouse. But it looks like more than just bluster

Personal assistant for your emails streamlines your life

GmailValet aims to use crowdsourcing to give everyone a personal assistant to help deal with their emails - it could cost as little as $2 a day

DNA 'identichip' gives a detailed picture of a suspect

A new microchip-based DNA tester can identify multiple traits of an individual at a time, even where their DNA is scarce

Most fundamental clock ever could redefine kilogram

Physicists have created the first clock with a tick that depends on the hyper-regular frequency of matter itself

Nanomachine mimics nature's protein factory

An artificial ribosome that assembles proteins and peptides could make it much easier to manufacture antibiotics and exotic new materials

Muscle mimic pulls electricity from wet surface

A plastic film that repeatedly curls up and flips over when wet could power devices in remote areas or sensors embedded in sweaty clothing

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Euro adds more gains on dollar

NEW YORK: The euro surged for a second day Friday, adding 0.7 US cents to Thursday's two cent gain, pushed by what one analyst said was short covering and sustained by poor US trade data.

The European currency traded roughly around the break-even line of $1.3261 but then took a leap to the $1.3350 levels the morning opening -- just 15 minutes before US trade data for November showed a wider-than-expected deficit that implied slower growth.

"While a rise in the euro isn't out of the ordinary lately, particularly after yesterday's European Central Bank monetary policy decision and press conference, many euro crosses had settled in to a range in the 18 hours before the spike occurred," said Neal Gilbert of GFT.

He said a Goldman Sachs recommendation with a target for $1.37 could have been the force, but also a squeeze on short sellers.

"Since the market had turned sideways in the Asian and European sessions, many investors were likely assuming a profit taking drop was about to take place."

Now that trade has been flushed out, he added, "the profit taking is more likely to take place."

At 2200 GMT, the euro was at $1.3341, off the day's high of $1.3366.

The yen sagged to its lowest level in more than 30 months, hitting 89.18 yen to the dollar from 88.64 late Thursday.

Against the euro, it hit 119.00 yen, compared to 117.53 Thursday; it was the yens lowest level in 20 months against the euro.

The pound slipped to $1.6129 from $1.6158, and the dollar moved to 0.9135 Swiss francs from 0.9145 francs.

The Chinese currency continued its push higher, to 6.2180 yuan per dollar from 6.2256 a day earlier and 6.2316 a week ago.

-AFP/ac

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$100 to Facebook message Mark Zuckerberg? Bargain!

LAS VEGAS -- I woke up this morning wanting to tell the world about all the fun last night.

I wanted to tell Beyonce about how much one woman told me she had worked in order to get her man to put a ring on it.

I wanted to tell Britney Spears that there were still people in the world who adored her music and some of them are here in Nevada, worried that she's leaving "The X Factor."

And I wanted to tell Facebook CEO Mark Zuckerberg that I had met so many fine young people in Vegas who were simply desperate to be him.

Suddenly, I heard that if I wanted to use Facebook for any of these communications, it might cost me $100.

More Technically Incorrect

Mashable had reported the quite frightening news that some people were being asked to pay such an amount in order to send a Facebook message to the exalted.

Thankfully, the Wall Street Journal had mustered an explanation from Facebook. It appears that the site is concerned about the amount of spam that wafts about its pages. Especially the amount of spam directed at those who have vast and emotional numbers of subscribers.

Facebook is also experimenting with allowing only one message per week to be sent to these immensely popular people whose Facebook pages are probably manned by flunkies, rather than the deities themselves.

I know that many might be outraged at the idea that Facebook might charge such an enormous amount for what might truly amount to painfully meaningless access to the rich, the famous and the notorious. Yet think about what real human beings are prepared to do in order to experience the very slightest proximity -- however much imagined -- with their heroes.

By charging $100, Facebook may not merely be expressing its deep desperation for revenue. It may also tapping into a bottomless and lucrative well of adoration.

There are people who will travel hundreds, if not thousands, of miles in order to (hope to) catch a glimpse of some famous being. There are those who think nothing of paying vast money for a lock of hair that purported to come from some starlet's fur coat.

There are even people who will go out of their way to visit Facebook's own headquarters in Menlo Park, just to be photographed with the company's "like" logo.

Think of the pride people would feel in the sure knowledge that their message to Mark would get through. Think of how they could show off in their status updates: "I just paid $100 to message Mark Zuckerberg." And think how Facebook could then use these status updates to create ads for this $100 message capability.

Once upon a time, Facebook was a place where the masses would congregate and mill. Now, it can be a place where you can genuflect and venerate as you communicate -- and pay good money to do it.

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Pictures: Civil War Shipwreck Revealed by Sonar

Photograph by Jesse Cancelmo

A fishing net, likely only decades old, drapes over machinery that once connected the Hatteras' pistons to its paddle wheels, said Delgado.

From archived documents, the NOAA archaeologist learned that Blake, the ship's commander, surrendered as his ship was sinking. "It was listing to port, [or the left]," Delgado said. The Alabama took the wounded and the rest of the crew and put them in irons.

The officers were allowed to keep their swords and wander the deck as long as they promised not to lead an uprising against the Alabama's crew, he added.

From there, the Alabama dropped off their captives in Jamaica, leaving them to make their own way back to the U.S.

Delgado wants to dig even further into the crew of the Hatteras. He'd like see if members of the public recognize any of the names on his list of crew members and can give him background on the men.

"That's why I do archaeology," he said.

(Read about other Civil War battlefields in National Geographic magazine.)

Published January 11, 2013

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Obama Promises Faster Transition in Afghanistan

President Obama and Afghan President Hamid Karzai said today that most U.S. combat operations in Afghanistan would end this spring, signaling a quickening troop drawdown that will bring the decade-long war to a close at the end of 2014.

"Our troops will continue to fight alongside Afghans when needed, but let me say it as plainly as I can: Starting this spring, our troops will have a different mission -- training, advising, assisting Afghan forces," Obama announced at an East Room news conference in Washington.

"It will be a historic moment and another step toward full Afghan sovereignty, something I know that President Karzai cares deeply about, as do the Afghan people," he said.

Administration officials said Afghan forces were "exceeding initial expectations" in their capabilities. Afghan security forces are expected to lead 90 percent of security operations across the country in February.

"By the end of next year -- 2014 -- the transition will be complete," Obama said. "Afghans will have full responsibility for their security, and this war will come to a responsible end."

The rosy assessments belied the serious political, economic and security challenges that remain.

Left unanswered by Obama and Karzai: How many U.S. troops might stay after 2014; what their mission would be and whether they could be effective; and whether the forces would have immunity from prosecution in Afghan courts.

Charles Dharapak/AP Photo

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Obama said he was still reviewing recommendations from the Pentagon and will make an announcement in the coming weeks after penning an anticipated bilateral security agreement with Afghanistan. Karzai said the exact number would be up to the United States to decide.

Both leaders confirmed in a statement that the United States "does not seek permanent bases in Afghanistan."

They also agreed today to turn over battlefield combatants held by the U.S. military in Afghanistan to Afghan government control, which has been long-sought by Karzai.

Roughly 66,000 U.S. troops are serving in Afghanistan. The military has proposed keeping several thousand troops in the country after 2014 as advisers, trainers and logistical support for Afghan forces; the White House has said it remains open to pulling out all troops entirely.

Obama's visit with Karzai was the first face-to-face encounter since the November election and since last year's dramatic increase in so-called green-on-blue attacks, when U.S. and NATO soldiers have been killed by the Afghans they are training or working alongside.

There were 45 insider attacks in 2012 that resulted in 62 deaths among coalition forces, including 35 Americans. There has been one attack already in the first 11 days of 2013.

The White House summit included a private Oval Office meeting between Obama, Karzai and Vice President Joe Biden. The trio also attended a private lunch in the Old Family Dining Room.

Karzai Thursday attended meetings with Defense Secretary Leon Panetta and top military brass at the Pentagon, where he was afforded all the pomp and circumstance accorded a head of state: a 21-gun salute, and marching bands and honor guards from the Army, Navy, Air Force, Marines and Coast Guard.

Karzai's relationship with the United States has at times been a rocky one as he has sometimes made critical statements about the allied troop presence in his country. U.S. officials believe he has made those comments out of political expediency to improve his standing with Afghans and show his independence.

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Muscle mimic pulls electricity from wet surface

Electricity has been squeezed from a damp surface for the first time, thanks to a polymer film that curls up and moves – a bit like an artificial muscle – when exposed to moisture. The film could be used to run small, wearable devices on nothing but sweat, or in remote locations where conventional electricity sources aren't available.

When a dry polymer absorbs water, its molecular structure changes. This can, in principle, be converted into larger-scale movement, and in turn electricity. But previous attempts at creating a material powered by a moisture gradient – the difference in chemical potential energy between a wet region and a dry region - failed to produce a useful level of force.

These unsuccessful tries used a polymer called polypyrrole. Now Robert Langer and colleagues at the Massachusetts Institute of Technology have turned to the material again, embedding chains of it within another material, polyol-borate. This more complex arrangement mimics structures found in muscles as well as in plant tissues that bend in response to changes in humidity.

Flipping film

The result looks like an ordinary piece of thin black plastic, but when placed on a wet surface, something extraordinary happens. As the material absorbs water, its end curls away from the surface and the film becomes unstable, so it flips over. The ends have now dried out, so they are ready to absorb more water, and the whole process repeats itself. This continuous flipping motion lets the film travel across a suitably moist surface unaided.

Langer found that a 0.03-millimetre-thick strip, weighing roughly 25 milligrams, could curl up and lift a load 380 times its mass to a height of 2 millimetres. It was also able to move sideways when carrying a load about 10 times its mass.

To extract energy from this effect, Langer's team added a layer of piezoelectric material – one which produces electricity when squeezed. When this enhanced film, weighing about 100 milligrams, flipped over, it generated an output of 5.6 nanowatts – enough to power a microchip in sleep mode.

Electricity from sweat

Though the output is small, it is proof that electricity can be extracted from a water gradient. "To the extent of our knowledge, we are the first to utilise a water gradient, without a pressure gradient, to generate electricity," says Langer.

Large-scale energy harvesting is unlikely as the size of the device needed would be impractical, but it could be used to power small devices such as environmental monitoring systems in remote locations. "It will be interesting for applications where the amount of energy needed may be low but where access to energy may be difficult," says Peter Fratzl at the Max-Planck Institute of Colloids and Interfaces in Potsdam, Germany, who was not involved in the work.

Another application, Langer suggests, would be to place the film inside the clothing of joggers or athletes. The evaporation of sweat could generate enough electricity to power sensors monitoring blood pressure and heart rate.

Journal reference: Science, DOI 10.1126/science.1230262

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American Express cuts 5,400 jobs

American Express said Thursday it would lay off 8.5 per cent of its workforce in 2013, in an effort to contain operating expenses and adapt to customers moving to online and mobile platforms.

The bank said it would eliminate 5,400 jobs, though some of those will be offset by new positions, for a net cut of 4-6 per cent of the 63,500-strong workforce.

The layoffs will span different staff groups and businesses, both in the United States and its international operations, the company said.

The largest reductions will be in AmEx's travel businesses "which operate in an industry that is being fundamentally reinvented as a result of the digital revolution."

It said it took a US$400 million restructuring charge in its fourth quarter to December 31 to cover some of the severance costs of the layoffs.

The restructuring is "designed to contain future operating expenses, adapt parts of the business as more customers transact online or through mobile channels, and provide the resources for additional growth initiatives in the US and internationally," AmEx said.

Excluding the restructuring costs and other special items, the bank said its fourth-quarter net earnings came in at US$1.2 billion, the same as the year-earlier figure.

After the extra costs, net income was at US$637 million, or 56 cents a share, compared with US$1.01 a share for the fourth quarter of 2011.

"Maintaining our momentum in this environment will require us to evolve our business, embrace new technologies, become more efficient and generate resources to invest in the many growth opportunities we've identified," said chief executive Kenneth Chenault.

"For the next two years, our aim is to hold annual operating expense increases to less than three per cent.

"The overall restructuring program will put us in a better position as we seek to deliver strong results for shareholders and to maintain marketing and promotion investments at about nine per cent of revenues."

- AFP/jc

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Plextor unveils various SSD-based products at CES 2013

Plextor SSDs being showcased at CES 2013.

(Credit:
Dong Ngo/CNET)

LAS VEGAS--Plextor has more news in regard to its SSD development to share at CES 2013, in addition to introducing the M5 Pro Xtreme drive.

The storage vendor unveiled a few new solid-state storage devices today, including the M5M mSATA SSD, a Next Generation Form Factor (NGFF) SSD, and its new embedded multimedia card (eMCC).

The M5M mSATA is a 6Gbps SSD. The new drive has no outer casing and is just one-eighth the size of a standard 2.5-inch drive, designed especially for ultrabooks with limited space. It features the new Marvell 88SS9187 controller, and Toshiba's new 19nm Toggle NAND. The drive comes in 64GB, 128GB, and 256GB capacities, with all of them offering sequential read speeds of up to 540 MBps. The sequential write speeds, however, are 160 MBps, 320 MBps, and 430 MBps respectively. The drive's mean time between failures is rated at 2.4 million hours, and it will be available during the first quarter of the year.

The new M5M mSATA SSDs from Plextor.

(Credit:
Dong Ngo/CNET)

As the name suggests, the NGFF SSD has a new shape and size; it's even smaller than the mSATA. With typical measurements of just 51x30x5mm (about the size of a small thumbdrive, but thinner), it's designed for use in smartphones and mobile devices. The drive is available in 128GB and 256GB capacities with sequential read and write speeds of 700MBps and 550MBps, respectively. The new NGFF SSD will also be available in the first quarter.

And finally, the eMMC is just about the size of a small fingernail. The drive is available only in embedded applications such as digital cameras, smartphones, and
tablets. According to Plextor, an eMMC is a standardized method for bundling the controller into the flash die, and now includes features such as secure erase, TRIM, and high-priority interrupt. It offers up to 128GB of storage space with high performance. Expect devices with the new Plextor eMMC in the second quarter of the year.

Plextor's new tiny eMMC storage devices for embedded applications.

(Credit:
Dong Ngo/CNET)

On top of this, Plextor also showed off its 2.5-inch standard enterprise SSDs that use Single Level Cell (SLC) NAND and Multiple Level Cell (MLC) NAND. Plextor says the SLC drive focuses on high endurance to offer extreme reliability. The MLC drive features power protection that guards against data loss in case of power outages, and is also capable of withstanding an extreme range of temperatures. The new enterprise SSDs are available now.

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How "Cheating" Slime Mold Escapes Death

Cheaters do prosper—at least if you're a slime mold, a new study says.

The slime mold Dictyostelium discoideum, found in most warm parts of the world, has an unusual life cycle. Most of the time Dicytostelium cells are "happy" single cells that hang out and eat bacteria, according to study leader Lorenzo Santorelli of the University of Oxford, who conducted the research while at Rice University and Baylor College of Medicine.

But sometimes, when food is scarce, different strains of Dictyostelium, including a mutated strain, form a mobile, multicellular organism called a "slug." This cluster then sprouts a stalk called a fruiting body, which produces spores that disperse into new slime molds. (Also see "Slime Has Memory but No Brain.")

For a slug to produce a stalk, however, nearly 20 percent of its cells must die—essentially sacrificing themselves to pass on their genes. (Get a genetics overview.) The remaining 80 percent live on and become spores.

Now, for the first time, Santorelli and colleagues have figured out the mechanism by which the mutated strain is able to survive in higher numbers than the others.

It suppresses normal cells from becoming spores, thereby forcing more of these cells to sacrifice themselves for the stalk and die. Meanwhile, more cells in the mutated strain become spores—and thus avoid dying as stalk cells. In other words, more than the "fair share" of cheater cells see another day.

Cheating Cells Surprisingly Healthy

To make the discovery, the team mixed the cheater strain with normal strains and observed that more cells in the cheater strain live on. (See "Smart Slime, Ovulating Strippers Among 2008 Ig Nobels.")

On one hand, this isn't all that surprising, Santorelli noted: "Cooperation is always under attack in any organism—trying to get something for [yourself], it's just nature."

But what is striking, he said, is that usually cheaters eventually cause the entire cooperative system to collapse. Not so in Dictyostelium—somehow it's evolved a way to keep everything running smoothly, said Santorelli, whose study was recently published in the journal BMC Evolutionary Biology.

What's more, cheaters are usually weaker than cooperative individuals. But not in Dictyostelium cheaters, which appear to be quite healthy.

Santorelli wants to find out how the cheater strain is so successful. And, just maybe, the lowly slime mold could unravel the evolutionary and genetic basis for cooperation, he added.

"Slime mold is an amazing organism."

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Jodi Arias: 'No Jury Will Convict Me' for Murder

The jury in the Jodi Arias murder trial watched a television interview today in which Arias said "no jury will convict me" for killing her ex-boyfriend, Travis Alexander.

Arias added that she could never imagine committing such a violent act as killing Alexander.

"I understand all the evidence is really compelling," she said in the interview. "In a nutshell, two people came in and killed Travis. I've never even shot a gun. That's heinous. I can't imagine slitting anyone's throat."

She went on to tell the interviewer, "No jury will convict me and you can mark my words on that. ... I am innocent."

Arias made the statements to the television show "Inside Edition" after she was indicted for murdering Alexander. Months later, she would confess to killing him in his Mesa, Ariz., home and say it was in self-defense.

Jodi Arias Trial: Watch Live

Jodi Arias Murder Trial: Full Coverage

Photos of Key Players and Evidence in the Jodi Arias Murder Trial

The tape was played on the fifth day of testimony in Arias' trial, in which police allege that she carried out the murder with such brutal force that she stabbed Alexander 27 times, slashed his throat from ear to ear, and shot him in the head.

Arias, now 32, has claimed Alexander was a controlling and abusive "sexual deviant" who she was forced to kill in self-defense.

She could face the death penalty if convicted of Alexander's murder.

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Jodi Arias Trial: Defense Claims Victim Was Sex Deviant Watch Video

The defense petitioned the court to declare a mistrial at the end of testimony today, but the request was denied by Judge Sherry Stephens. Arias' attorneys claimed that testimony presented by Det. Esteban Flores about whether Arias shot Alexander first or at the end of the attack was different from his earlier testimony and, therefore, affected whether Arias was "especially cruel" during the killing -- but Stephens denied that it had any effect.

The jury also watched as dozens of photos of blood-spattered walls, flooring, stained carpets and blood smeared sink were explained in detail by a forensic analyst from the Mesa Police Department, who noted that on many of the stains water had been mixed with the blood and diluted it.

The prosecution has alleged that Arias tried to wash away the evidence of the killing with water.

Prosecutors spent much of today and Wednesday using Arias' recorded statements and other testimony to prove that she lied about her relationship with Alexander, where she was when Alexander was killed, and even where she worked as a bartender.

The testimony today suggested that Arias lied to her new boyfriend Ryan Burns about working at a bar called Margaritaville in her hometown of Yreka, Calif.

"Is there any restaurant in Yreka called Margaritaville? Has there ever been?" prosecutor Juan Martinez asked Nathaniel Mendes, a former detective with the Siskiyou County Sheriff's Office in California.

"No, sir," Mendes replied.

Mendes testified that Arias worked at a restaurant called Casa Ramos in Yreka, not a bar called Margaritaville, as she told Burns.

Mendes also went over receipts showing that Arias rented a car the day before she killed Alexander, and noted that she went to a rental outfit 90 miles from her hometown despite two businesses that rented cars in Yreka.

Arias told friends and investigators that she rented a car to go on a road trip to visit Burns, in West Jordan, Utah, on June 3, 2008. She showed up at Burns' house a day late with cuts on her hands, but told Burns that she got lost driving and that the cuts were from broken glass at her Margaritaville bartending job, according to Burns' testimony Wednesday.

The trail of receipts showed that Arias drove from California to Alexander's hometown of Mesa, Ariz., on Tuesday, June 4, 2008.

There, the pair had sex and took sexually graphic photos of one another, according to photographs and the opening statement of Arias' lawyer. Shortly after the tryst, Arias killed Alexander, both sides agree.

Burns testified that Arias never mentioned going to Alexander's house when she arrived at his home in Utah. He said he did not know that Arias and Alexander were still sexually involved, and that she told him they had broken up.

When she arrived at his home 24 hours after killing Alexander, she seemed "normal," he said. The pair kissed and cuddled, and went out with Burns' friends, where she laughed and made conversation.

Prosecutors have played recorded phone conversations between detectives and Arias in the weeks after Alexander's body was found. She could be heard apparently lying multiple times to investigators as they asked about the last time she spoke with Alexander and her trip to Utah.

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