Today on New Scientist: 21 December 2012

Cadaver stem cells offer new hope of life after death

Stem cells can be extracted from bone marrow five days after death to be used in life-saving treatments

Apple's patents under fire at US patent office

The tech firm is skating on thin ice with some of the patents that won it a $1 billion settlement against Samsung

Himalayan dam-building threatens endemic species

The world's highest mountains look set to become home to a huge number of dams - good news for clean energy but bad news for biodiversity

Astrophile: Black hole exposed as a dwarf in disguise

A white dwarf star caught mimicking a black hole's X-ray flashes may be the first in a new class of binary star systems

Blind juggling robot keeps a ball in the air for hours

The robot, which has no visual sensors, can juggle a ball flawlessly by analysing its trajectory

Studio sessions show how Bengalese finch stays in tune

This songbird doesn't need technological aids to stay in tune - and it's smart enough to not worry when it hears notes that are too far off to be true

Giant tooth hints at truly monumental dinosaur

A lone tooth found in Argentina may have belonged to a dinosaur even larger than those we know of, but what to call it?

Avian flu virus learns to fly without wings

A strain of bird flu that hit the Netherlands in 2003 travelled by air, a hitherto suspected by unproven route of transmission

Feedback: Are wind turbines really fans?

A tale of "disease-spreading" wind farms, the trouble with quantifying "don't know", the death of parody in the UK, and more

The link between devaluing animals and discrimination

Our feelings about other animals have important consequences for how we treat humans, say prejudice researchers Gordon Hodson and Kimberly Costello

Best videos of 2012: First motion MRI of unborn twins

Watch twins fight for space in the womb, as we reach number 6 in our countdown of the top videos of the year

2012 Flash Fiction winner: Sleep by Richard Clarke

Congratulations to Richard Clarke, who won the 2012 New Scientist Flash Fiction competition with a clever work of satire

Urban Byzantine monks gave in to temptation

They were supposed to live on an ascetic diet of mainly bread and water, but the monks in 6th-century Jerusalem were tucking into animal products

The pregnant promise of fetal medicine

As prenatal diagnosis and treatment advance, we are entering difficult ethical territory

2013 Smart Guide: Searching for human origins in Asia

Africa is where humanity began, where we took our first steps, but those interested in the latest cool stuff on our origins should now look to Asia instead

The end of the world is an opportunity, not a threat

Don't waste time bemoaning the demise of the old order; get on with building the new one

Victorian counting device gets speedy quantum makeover

A photon-based version of a 19th-century mechanical device could bring quantum computers a step closer

Did learning to fly give bats super-immunity?

When bats first took to the air, something changed in their DNA which may have triggered their incredible immunity to viruses

Van-sized space rock is a cosmic oddball

Fragments from a meteor that exploded over California in April are unusually low in amino acids, putting a twist on one theory of how life on Earth began

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CIA chief decries torture in Osama bin Laden hunt movie

WASHINGTON: Acting CIA director Michael Morell said that "Zero Dark Thirty," the Hollywood take on the hunt for Osama bin Laden, exaggerates the importance of information obtained by harsh interrogations.

The movie by Academy Award-winning director Kathryn Bigelow tells the story of the decade-long search after September 11, 2001 that climaxed in last year's dramatic and deadly raid in May on the Al-Qaeda terror leader's hideout in Abbottabad, Pakistan.

The film shows US personnel using harsh interrogation techniques like water-boarding -- a method widely seen as torture -- to force captives to speak. The information obtained was crucial, according to the movie, in piecing together the trail that eventually led to bin Laden.

Not so, Morell said in a message to Central Intelligence Agency employees released to AFP on Saturday.

The movie "creates the strong impression that the enhanced interrogation techniques that were part of our former detention and interrogation program were the key to finding bin Laden. That impression is false."

Morell's message, sent to the employees on Friday, states that "multiple streams of intelligence" led CIA analysts to conclude that bin Laden was hiding in Abbottabad.

He acknowledged that "some" of the information "came from detainees subjected to enhanced techniques. But there were many other sources as well."

The controversial techniques were banned in 2009 by President Barack Obama.

Morell said that "whether enhanced interrogation techniques were the only timely and effective way to obtain information from those detainees, as the film suggests, is a matter of debate that cannot and never will be definitively resolved."

Morell is widely believed to be a top candidate for the job of CIA director after the resignation of David Petreaus, America's most celebrated military leader in a generation. Petreaus stepped down in November after admitting to an extra-marital affair with his biographer.

Morell's message, first reported by The New York Times, echoes a statement decrying the "Zero Dark Thirty" interrogation scenes signed by three senators, including Republican John McCain, himself a prisoner of war and torture victim during the Vietnam War.

In a letter to the head of Sony Pictures, McCain -- the 2008 Republican presidential candidate -- and Democratic senators Diane Feinstein and Carl Levin wrote that the movie "clearly implies that the CIA's coercive interrogation techniques were effective" in obtaining information that would lead to bin Laden.

"We have reviewed CIA records and know that this is incorrect," the senators wrote. "We believe that you have an obligation to state that the role of torture in the hunt for (Bin Laden) is not based on the facts, but rather part of the film's fictional narrative."

However two CIA officials active when suspects were tortured disputed those assertions.

Jose Rodriguez, who oversaw the CIA's counterterrorism operations when "harsh interrogation" methods were in use, wrote in the Washington Post in April that the path leading to bin Laden "started in a CIA black site ... and stemmed from information obtained from hardened terrorists who agreed to tell us some (but not all) of what they knew after undergoing harsh but legal interrogation methods."

And former CIA director Michael Hayden wrote in a Wall Street Journal in June 2011 that a "crucial component" of information that eventually led to bin Laden came from three CIA prisoners, "all of whom had been subjected to some form of enhanced interrogation."

Hayden claimed that he learned the information when, in 2007, he was first briefed about pursuing bin Laden through his courier network.

But interim CIA director Morell emphasized the film, a likely Oscar contender, "takes significant artistic licence, while portraying itself as being historically accurate."

"What I want you to know is that Zero Dark Thirty is a dramatization, not a realistic portrayal of the facts.

"CIA interacted with the filmmakers through our Office of Public Affairs but, as is true with any entertainment project with which we interact, we do not control the final product."

- AFP/jc

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First day tips and tweaks for new MacBook owners

As much as new MacBook owners love to rave about their systems, no laptop -- even one with an Apple logo -- comes right out of the box ready to perform optimally.

And while it's certainly exciting to unwrap a new holiday MacBook, there are a handful of tweaks, tips, and fixes you should check out on day one that will make your MacBook easier to use. I've put together some of my personal favorites here.

There are many more I could list, and I'm sure I've left out some of your favorites, so feel free to leave your own Day One tips for new MacBook owners in the comments section.

 

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Holiday Gift Guide

Your mobile devices could use a little holiday cheer as well. Take a look at this gathering of affordable accessories.

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Urban Advocates Say New Gun Control Talk Overdue

For years, voices have cried in the urban wilderness: We need to talk about gun control.

Yet the guns blazed on.

It took a small-town slaughter for gun control to become a political priority. Now, decades' worth of big-city arguments against easy access to guns are finally being heard, because an unstable young man invaded an elementary school in Newtown, Conn., with a military-style assault rifle and 30-bullet magazines. Twenty young children and six adults were slain.

President Barack Obama called the tragedy a "wake-up call." Vice President Joe Biden met Thursday with Obama's cabinet and law-enforcement officers from around the country to launch a task force on reducing gun violence. Lawmakers who have long resisted gun control are saying something must be done.

Such action is energizing those who have sought to reduce urban gun violence. Donations are up in some places; other leaders have been working overtime due to this unprecedented moment.

The moment also is causing some to reflect on the sudden change of heart. Why now? Why weren't we moved to act by the killing of so many other children, albeit one by one, in urban areas?

Certainly, Newtown is a special case, 6- and 7-year-olds riddled with bullets inside the sanctuary of a classroom. Even in a nation rife with violence, where there have been three other mass slayings since July and millions enjoy virtual killing via video games, the nature of this tragedy is shocking.

Critics Slam NRA for Proposing Armed School Guards Watch Video

Gun Violence Victims, Survivors Share Thoughts After Newtown Massacre Watch Video

But still: "There's a lot of talk now about we have to protect our children. We have to protect all of our children, not just the ones living in the suburbs," said Tammerlin Drummond, a columnist for the Oakland Tribune.

In her column Monday, Drummond wrote about 7-year-old Heaven Sutton of Chicago, who was standing next to her mother selling candy when she was killed in the crossfire of a gang shootout. Also in Chicago, which has been plagued by a recent spike in gun violence: 6-year-old Aaliyah Shell was caught in a drive-by while standing on her front porch; and 13-year-old Tyquan Tyler was killed when a someone in a car shot into a group of youths outside a party.

Wrote Drummond: "It has taken the murders of 20 babies and six adults in an upper-middle class neighborhood in Connecticut to achieve what thousands of gun fatalities in urban communities all over this country could not."

So again: What took so long? The answers are complicated by many factors: resignation to urban violence, even among some of those who live there; the assumption that cities are dangerous and small towns safe; the idea that some urban victims place themselves in harm's way.

In March, the Children's Defense Fund issued a report titled "Protect Children, Not Guns 2012." It analyzed the latest federal data and counted 299 children under age 10 killed by guns in 2008 and 2009. That figure included 173 preschool-age children.

Black children and teens accounted for 45 percent of all child and teen gun deaths, even though they were only 15 percent of the child/teen population.

"Every child's life is sacred and it is long past time that we protect it," said CDF president Marian Wright Edelman in the report.

It got almost no press coverage — until nine months later, when Newtown happened.

Tim Stevens, founder and chairman of the Black Political Empowerment Project in Pittsburgh, has been focusing on urban gun violence since 2007, when he said Pennsylvania was declared the worst state for black-on-black violence.

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Strong 6.8 quake strikes off Vanuatu: USGS

SYDNEY: A strong 6.8-magnitude earthquake hit off the coast of the South Pacific island of Vanuatu on Saturday, the US Geological Survey said, but no immediate tsunami warning was issued.

The quake struck at a depth of more than 200 kilometres around 2230 GMT Friday some 130 kilometres north of Santo, USGS said.

"It's quite deep ... so there's no tsunami," said David Jepsen, a seismologist with Geoscience Australia which measured the quake at 6.6 magnitude.

"I think it's well away from (the capital) Port Vila... but it's closer to some of the islands further to the northwest, but they would have had some moderate shaking really," he told AFP.

The Hawaii-based Pacific Tsunami Warning Center said a destructive tsunami was not generated, based on the earthquake and historical tsunami data.

Vanuatu lies on the so-called "Pacific Ring of Fire", a zone of frequent seismic activity caused by friction between shifting tectonic plates.

It has been rocked by several large quakes in recent years, averaging about three magnitude 7.0 or above incidents every year without any major damage.

- AFP/jc

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Why does my external hard drive only show 2.2TB?

External hard drives are exceptionally useful for expanding storage capabilities for both backups and data management. While external hard drives are often sold in preconfigured packages by manufacturers, another popular option is to purchase an external hard-drive enclosure and then use any drive of your choice in it. This is beneficial because as your demands for storage increase, you can replace the enclosure's drive with a larger one.

These days, the availability of hard drives with 4TB of storage are enticing for people to swap into their existing enclosures; however, when doing so they may find that the system will only recognize 2.2TB of the drive, regardless of how they partition or format the device.

While modern file-system formats such as HFS+, NTFS, and ExFAT ought to handle volume sizes of between hundreds of gigabytes to zettabytes, and though operating systems like OS X have increased the maximum volume size from 2TB to 8EB (exabytes) over the years, there are hardware limitations that may limit the size of the volume that can be used. If you are using an older drive enclosure for your large hard drive, then the controllers on it may not be capable of handling over 2.2TB, regardless of the software environment being used around it.

This problem happens because of the use of LBA (logical block addressing) in modern hard-drive controllers coupled with a hardware-based limit of how many blocks can be included in the LBA scheme. Early LBA controllers used 32-bit (or lower) addressing coupled with a maximum supported block size of 512 bytes. This means they support up to 2^32 or 4,294,967,296 blocks for a device, and with each block being 512 bytes, this translates to a maximum of 2,199,023,255,552 bytes, or 2.199TB.

Unfortunately in many cases these limits are hard-coded in enclosure's firmware, so even though modern drives use 4,096-byte sectors, the system will still only address these sectors as 512 bytes in size, resulting in both a waste of space and degraded performance.

The only way around this problem is to replace your drive enclosure with a new one that has proper support for both 48-bit (or greater) LBA and 4,096-byte sectors in hard drives. Luckily most enclosures on the market today do support this, so if you run into this problem, you should be up and running in no time.

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Pictures: Fungi Get Into the Holiday Spirit

Photograph courtesy Stephanie Mounaud, J. Craig Venter Institute

Mounaud combined different fungi to create a Santa hat and spell out a holiday message.

Different fungal grow at different rates, so Mounaud's artwork rarely lasts for long. There's only a short window of time when they actually look like what they're suppose to.

"You do have to keep that in perspective when you're making these creations," she said.

For example, the A. flavus fungi that she used to write this message from Santa grows very quickly. "The next day, after looking at this plate, it didn't say 'Ho Ho Ho.' It said 'blah blah blah,'" Mounaud said.

The message also eventually turned green, which was the color she was initially after. "It was a really nice green, which is what I was hoping for. But yellow will do," she said.

The hat was particularly challenging. The fungus used to create it "was troubling because at different temperatures it grows differently. The pigment in this one forms at room temperature but this type of growth needed higher temperatures," Mounaud said.

Not all fungus will grow nicely together. For example, in the hat, "N. fischeri [the brim and ball] did not want to play nice with the P. marneffei [red part of hat] ... so they remained slightly separated."

Published December 21, 2012

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Obama Says He Is 'Ready and Willing' to Get Deal

President Barack Obama says he is "ready and willing" to get a big package done to deal with the "fiscal cliff" and says there's no reason not to protect middle-class Americans from tax increases.

Mandel Ngan/AFP/Getty Images

Fiscal Cliff: Boehner Doesn't Have Votes for Plan B Watch Video

Next Steps for Fiscal Cliff? 'God Only Knows,' Says Boehner Watch Video

'Fiscal Cliff' Negotiations: Boehner's Plan B Watch Video

Obama says he spoke Friday with House Speaker John Boehner and met with Senate Majority Leader Harry Reid. He says Congress should pass a plan to extend tax breaks for the middle class and extend unemployment benefits.

Obama says no one can get 100 percent of what they want and there are "real consequences" to how they deal with the across-the-board tax increases and steep spending cuts scheduled to kick in Jan. 1. Economists fear the combination could deliver a blow to the U.S. economy.

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Van-sized space rock is a cosmic oddball

The shattered remains of a high-profile space rock are oddly low in organic materials, the raw ingredients for life. The discovery adds a slight wrinkle to the theory that early Earth was seeded with organics by meteorite impacts.

In April a van-sized meteor was seen streaking over northern California and Nevada in broad daylight. The fireball exploded with a sonic boom and sprayed the region with fragments. Videos, photographs and weather radar data allowed the meteor's trajectory to be reconstructed, and teams quickly mobilised to search for pieces in the foothills of the Sierra Nevada in northern California.

Researchers readily identified the meteorites as rare CM chondrites, thought to be one of the oldest types of rock in the universe. "Because the meteorites were discovered so freshly, for the first time we had a chance to study this type of meteorite in a pristine form," says Peter Jenniskens of the SETI Institute in Mountain View, California, who led the search effort and the subsequent study of the space rocks.

Jenniskens personally found a fragment in a parking lot, where it remained relatively free of soil contaminants. "That's the best you could hope for, other than landing in a freezer," says Daniel Glavin of NASA's Goddard Space Flight Center in Greenbelt, Maryland.

Battered past

CM chondrites make up only about 1 per cent of known meteorites. Most of them contain plenty of organic materials, including amino acids, the building blocks of life on Earth.

Jenniskens and colleagues found that the California fragments also have amino acids, including some not found naturally on Earth. But in three rocks collected before a heavy rainstorm, which bathed the other pieces in earthly contaminants, organics are less abundant by a factor of 1000 than in previously studied CM chondrites.

These three rocks could not have lost organics due to space "weathering": analysis of the meteorites' exposure to cosmic rays suggests the original meteor was flying through space for only about 50,000 years before hitting Earth.

Based on its trajectory and its relatively short flight time, Jenniskens thinks the meteor can be traced back to a family of asteroids dominated by 495 Eulalia, a group known as a possible source of CM chondrites. It is probably a piece that broke off during an impact, revealing the relatively pristine material inside.

So what happened to its organics? Jenniskens' team found that the meteorites are breccia – smaller rocks cemented together – which suggests that the asteroid from which they came took a series of beatings. Those impacts, or possibly other processes inside the asteroid, could have heated it enough to destroy most organic material.

Limited delivery

The result might have implications for the organics delivery theory, says Bill Bottke of the Southwest Research Institute in Boulder, Colorado.

"It shows that not all asteroids can deliver sufficient quantities. One of the disappointments is that, from a prebiotic organic chemistry perspective, it was very limited," says Bottke. "But this is an unusual case. Most [CM chondrites] are loaded with organic compounds."

Still, studying the space rocks will help us prepare future missions to asteroids such as OSIRIS-Rex, scheduled to take off for asteroid 1999 RQ36 in 2016 and bring a sample back in 2023.

"In some ways, we've had a sample, a very fresh one, come to us," says Bottke. "This is a test bed for the techniques we'll use in that mission."

Journal reference: Science, DOI: 10.1126/science.1227163

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Dollar steady as investors await fiscal cliff sign

WASHINGTON: The dollar lost a little bit of ground against the euro and was largely flat against the yen in quiet trade on Thursday as investors awaited a clear sign from US "fiscal cliff" talks.

The euro stood at $1.3241 towards 2200 GMT, up from $1.3226 late Wednesday. It also rose against the Japanese yen, reaching 111.72 yen compared to 111.59 yen a day earlier.

The dollar held steady against the yen, after reaching its highest level against the currency since April 2011 on Wednesday.

On Thursday, the greenback edged lower to 84.38 yen towards 2200 GMT from 84.39 yen a day earlier.

Japan's central bank unveiled more huge monetary easing earlier on Thursday in the wake of a weekend election won by the Liberal Democratic Party.

With an end-of-year deadline approaching, the markets are watching whether Washington can avert the so-called fiscal cliff, a mix of tax hikes and spending cuts set to take effect in January that could plunge the world's biggest economy back into recession.

Analysts said remarks by top Republican John Boehner had sparked slight optimism, increasing investors' appetite for risk, for the euro among other things.

Talks between President Barack Obama and Boehner on averting the "fiscal cliff" have stalled amid accusations of political grandstanding on both sides.

In other currencies, the dollar slipped to 0.9115 Swiss francs, while the pound rose to $1.6280.

- AFP/fa

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