Two worms, same brains – but one eats the other



































IF TWO animals have identical brain cells, how different can they really be? Extremely. Two worm species have exactly the same set of neurons, but extensive rewiring allows them to lead completely different lives.












Ralf Sommer of the Max Planck Institute for Developmental Biology in Tübingen, Germany, and colleagues compared Caenorhabditis elegans, which eats bacteria, with Pristionchus pacificus, which hunts other worms. Both have a cluster of 20 neurons to control their foregut.












Sommer found that the clusters were identical. "These species are separated by 200 to 300 million years, but have the same cells," he says. P. pacificus, however, has denser connections than C. elegans, with neural signals passing through many more cells before reaching the muscles (Cell, doi.org/kbh). This suggests that P. pacificus is performing more complex motor functions, says Detlev Arendt of the European Molecular Biology Laboratory in Heidelberg, Germany.












Arendt thinks predators were the first animals to evolve complex brains, to find and catch moving prey. He suggests their brains had flexible wiring, enabling them to swap from plant-eating to hunting.












This article appeared in print under the headline "Identical brains, but one eats the other"


















































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Militants free Filipinos seized with Jordanian journalist






MANILA: Islamist Abu Sayyaf militants have freed two Filipino television crew members seized along with a Jordanian journalist nearly eight months ago in the southern Philippines, police said Sunday.

Looking frail and gaunt, audio technician Roland "Buboy" Letriro and cameraman Ramil Vela walked free Saturday on Jolo island where they had been held since June last year, regional police chief Noel delos Reyes told AFP.

Delos Reyes said there was "no word" on the fate or exact whereabouts of the Jordanian journalist, Bakr Atyani, of the Dubai-based Al Arabiya network.

"Shortly after they were freed they called their families from a hotel room in Jolo," delos Reyes said. "They were then taken by authorities to the provincial hospital to be checked up."

As they lay on their hospital beds, the two tearfully recounted their ordeal in the hands of the militants in Jolo's harsh jungle terrain, according to Jolo deputy provincial police chief Roy Gabor.

"We went through so much difficulty. We didn't know whether we would make it out alive," Gabor quoted the two as saying as they were fed bread and water.

He described the pair as very emotional, and said they emerged from the jungle looking thin and with unkempt hair and beards.

"They were a bit confused. They said they were just told to leave the hostage lair," Gabor told AFP.

He said the two related that they were separated from Atyani on the fifth day of their captivity, and that they had not seen him since.

The gunmen gave them a horse because Vela could not walk due to a swollen leg, and both left the jungle hideout unescorted until they reached a highway.

They then rode a tricycle to Jolo's main port where went to a hotel and sought help, Gabor said, adding that they would soon fly back to Manila to be reunited with their families.

Delos Reyes denied a ransom was paid for their release.

The two travelled with Atyani to Jolo island in June of last year after they were locally hired in Manila by the Jordanian to film the militants.

They went missing a day after they arrived, and police subsequently said the trio were held captive by the Abu Sayyaf -- a group of self-styled militants blamed for the country's worst terrorist attacks as well as other kidnappings.

The group was founded with seed money from Osama bin Laden's Al Qaeda network to fight for an independent Islamic state, though it later degenerated into a criminal gang.

US special forces have been rotating in the southern Philippine for over a decade to train local troops in crushing Abu Sayyaf which is on Washington's list of wanted foreign terrorist organisations.

At least four other foreign hostages are believed still held in the south by Abu Sayyaf and other militant outfits -- a Dutchman, a Swiss national, an Australian and a Japanese man.

Australian Foreign Minister Bob Carr last month welcomed news that Warren Rodwell, 54, was alive after being held hostage for more than a year, but said his prolonged captivity was a "major concern".

European birdwatchers, Dutchman Ewold Horn, 52, and Swiss national Lorenzo Vinciguerra, 47, were kidnapped in February last year. The Japanese man, Toshio Ito, was seized in July 2010.

-AFP/ac



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How Boeing's 777-300ER could help save American Airlines



American Airlines hopes its rise back to profitability and relevance can get a big jump start with the launch of all-new livery, and Boeing's 777-300ER. It is the first U.S. carrier to fly the plane, the most successful twin-engine aircraft in the world.



(Credit:
Chris Sloan/Airchive.com)



It has become the world's most-successful twin-engine airplane, but until now, no U.S. carrier has flown Boeing's 777-300ER. But with the launch on Thursday of its Dallas to Sao Paolo, Brazil flight, American Airlines has broken new ground, and is now depending on its fledgling 777-300ER fleet to re-earn its once legendary wings. And make it a lot of money.



Among the many passengers aboard the inaugural flight to Sao Paolo was Chris Sloan, an aviation writer who often flies on the most notable planes in the skies. Sloan, who previously shared his impressions of the inaugural Boeing 787 Dreamliner commercial flight with CNET, has once again let us in on what it's like to be among the first people aboard a notable, world-class airplane.




As Sloan notes, the past few years have not been kind to American Airlines. The carrier has gone through bankruptcy, seats becoming unbolted, a disastrous crash, and more.


But the airline is doing its best to come back from the dead, and the launch of service aboard the 777-300ER, as well as the roll-out of all-new livery, show that American can't be counted out.


As Sloan wrote:

In an era of smaller airliners, American inaugurated the 777-300, the largest new airliner by a U.S. carrier since the last Boeing 747-400s entered service with U.S. airliners in the late 1990s. Built to handle up to 386 passengers and fly up to 7,825 nautical miles, American's 777-300ER is the first plane flown by a U.S. carrier to feature a stand-up bar since the 1970s, Sloan wrote. American flies the aircraft in a 304-passenger, four-class and six-cabin configuration.


This inaugural, flight 963, from Dallas/Ft. Worth to São Paulo, Brazil in the author's view is one of the most significant in the airline industry in years because it is about something much bigger than just the launch of a new airliner, it's about the re-birth of a proud American institution that happens to bear the name of our country - American Airlines.



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Pictures We Love: Best of January

Photograph by Dieu Nalio Chery, AP

The magnitude 7 earthquake that struck near Port au Prince, Haiti, in January 2010 so devastated the country that recovery efforts are still ongoing.

Professional dancer Georges Exantus, one of the many casualties of that day, was trapped in his flattened apartment for three days, according to news reports. After friends dug him out, doctors amputated his right leg below the knee. With the help of a prosthetic leg, Exantus is able to dance again. (Read about his comeback.)

Why We Love It

"This is an intimate photo, taken in the subject's most personal space as he lies asleep and vulnerable, perhaps unaware of the photographer. The dancer's prosthetic leg lies in the foreground as an unavoidable reminder of the hardships he faced in the 2010 earthquake. This image makes me want to hear more of Georges' story."—Ben Fitch, associate photo editor

"This image uses aesthetics and the beauty of suggestion to tell a story. We are not given all the details in the image, but it is enough to make us question and wonder."—Janna Dotschkal, associate photo editor

Published February 1, 2013

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Gun Violence 'Depletes Precious Natural Resource'












It took the mass shooting in Newtown, Connecticut, to prompt lawmakers to call for stricter gun legislation. But the reality is that in a city like Chicago, where 515 murders took place last year and more than 100 shooting incidents have occurred since January 1, gun violence is an ongoing issue and it has been for years. Only, these shootings have become so common that they don't make national headlines.


"We lost a classroom full of children in Connecticut which sparked national outrage that needs to be translated into action, but in Chicago, we sometimes lose a dozen or more young people every weekend," Rep. Luis Gutierrez (D-Illinois), who serves the Chicago area, said in a statement. "Too many bullets and too many guns are killing the next generation and we have got to make it stop."


Gutierrez, like many others, believe that any debate about gun violence shouldn't just take into account mass shootings that make headline news. It should also consider the chronic gun violence that takes place on a daily basis across the U.S.


In Chicago's case, many of the victims are young minorities growing up in poor, gang-ridden neighborhoods on the south and west side of the city.


Just earlier this week a 15-year-old girl who performed at President Barack Obama's recent inauguration was gunned down, The Washington Post reported.


The teen, Hadiya Pendleton, was hanging out in a park with about a dozen other young people when she was shot. Two other victims were reportedly wounded. By all accounts she was in the wrong place at the wrong time. Reports indicate that the gunman was not even aiming at her.


And Pendleton is just the latest example. Chicago police officer Ron Holt lost his son, Blair, to gun violence in the spring of 2007. The 16-year-old was shot and killed while riding a bus after school.


Holt now works with young people in the community, particularly minorities at an increased risk of engaging in dangerous behavior, to encourage them to focus on their education instead of turning to violence.


"I explain to them that if they continue to ascribe to this diabolical idea of resolving conflict with firearms they're depleting the most precious natural resource in the community, and that is them," Holt said.


What's clear is that the root of the gun problem is not just the guns. There are several factors that play a role, many of which are rarely discussed. For example, for minority youth living in urban communities characterized by poverty, violence, particularly gun violence, tends to be chronic. And the groups largely impacted tend to be African American and Hispanic.


A lot of that has to do with acculturation, according to Rahsmia Zatar, executive director of Strong Youth, a gang prevention and intervention organization. There is a sense that it's difficult to move beyond one's cultural sphere.


As a result, minorities often tend to gravitate toward other young minorities in similar situations, and turn to violence to gain a sense of control, however false it really is.






Charles Rex Arbogast/AP Photo







"It's easy to fall victim to feeling a sense of empowerment through violence," Zatar said. "They feel they have limited opportunities and they don't have a sense of 'I can achieve,' [or] that there is something here for me that's better."


According to the 2011 American Community Survey by the U.S. Census Bureau, more than 30 percent of Chicago's African-American population and nearly 27 percent of Hispanics live below the poverty line. Perhaps more importantly, blacks and whites remain largely segregated, with African-Americans making up the vast majority of neighborhoods in the south, and whites comprising most of the north. Latinos are somewhat more mixed, often living in "buffer" communities between blacks and whites, which could exacerbate the pressure to conform to two cultures, neither of which is entirely comfortable.


These various enclaves also suffer from a distinct gang problem. Chicago Police Commissioner Garry McCarthy told Reuters the city is plagued by the breakup of larger more established gangs into new factions that are fighting over everything from turf to money.


Then there's the city's illicit gun issue, which is bigger than New York's or Los Angeles' despite strict laws to limit weapons. Gun shops are actually outlawed in Chicago, as are assault weapons and high-capacity magazines. Handguns were even banned until 2010.


Still, in a place like Chicago it's handguns doing the most damage. According to statistics from the Bureau of Alcohol, Tobacco, Firearms and Explosives, most of the guns they recovered in Illinois were pistols, followed by revolvers and rifles. Machine guns come in a distant sixth.


Why so many guns? Gun laws in neighboring communities are not as strict, and firearms make their way into the city. According to a recent article by The New York Times, officials "seized 7,400 guns [in Chicago] in crimes or unpermitted uses last year (compared with 3,285 in New York City), and have confiscated 574 guns just since Jan. 1 — 124 of them last week alone."


And while Chicago residents are required to report the loss or theft of a handgun, that same law does not apply to all of Illinois, so a stolen firearm could easily make its way into Chicago without the owner ever reporting it missing.


The dynamics created in poor minority communities like those in Chicago combined with the sheer number of guns that make their way into such a city bear out in the overall statistics.


According to the Bureau of Justice's National Crime Victimization Survey, African Americans were disproportionately represented among homicide victims and offenders between 1980 and 2008. They were six times more likely than whites to be homicide victims and seven times more likely than whites to commit homicides.


Latinos don't fare much better. According to the National Council of La Raza, the nation's largest Hispanic advocacy organization, "Today in America, every three hours a young person is killed by firearm violence. Every 14 hours, that teen or child is Latino."


Young Latinos are especially likely to be impacted by gang violence in places like Chicago. Nationally, Hispanics are also more likely than non-Hispanics to be victims of violent crimes committed by gang members.


The impact of guns on the Latino community may explain why they're inclined to favor increased gun control. According to the Pew Research Center, while 57 percent of whites think it's more important to protect the rights of Americans to own guns than to protect gun ownership, only 29 percent of Latinos feel the same way.


Holt would certainly like to see something change. Several days after his son was killed, he received a voicemail. It was then-Senator Barack Obama. The young lawmaker had called Holt to express his condolences and to promise that if there was anything he could do in the future to help curb gun violence, he was prepared to do it. The two never spoke on the phone, but Holt remembers the message.




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Astrophile: A scorched world with snow black and smoky






















Astrophile is our weekly column on curious cosmic objects, from the solar system to the far reaches of the multiverse






















Object: Titanium oxide snow
Location: The hot-Jupiter planet HD 209458b












There is something magical about waking up to discover it has snowed during the night. But there's no powdery white blanket when it snows on exoplanet HD 209458b. Snow there is black, smoky and hot as hell – resembling a forest fire more than a winter wonderland. Put it this way: you won't be needing mittens.












HD 209458b belongs to a family called hot Jupiters, gas-giant planets that are constantly being roasted due to their closeness to their sun. By contrast, the gas giants in our immediate neighbourhood, including Jupiter, are frigid, lying at the solar system's far reaches.












HD 209458b is also noteworthy because it is tidally locked, so one side is permanently facing towards its star while the other is in perpetual night. On the face of it, these conditions wouldn't seem to invite snow: temperatures on the day side come close to 2000° C, while the night side is comparatively chilly at around 500° C.












Snow made of water is, of course, impossible on this scorched world, but the drastic temperature differential sets up atmospheric currents that swirl material from the day side to night and vice versa. That means that any substances with the right combination of properties might be gaseous on the day side and then condense into a solid on the night side, and fall as precipitation. Say hello to titanium oxide snow.











Stuck on the surface













Although oxides of titanium make up only a small component of a hot Jupiter's atmosphere, these compounds have the right properties to fall as snow. But there was a snag that could have put a stop to any blizzards. Older computer models of hot Jupiters suggested that titanium oxides condensing in the air on the night side would snow – and remain on the relatively cool surface forever. "Imagine on Earth if you had no mechanism to evaporate water, it would never rain," says Vivien Parmentier of the Côte d'Azur Observatory in Nice, France.












Now he and colleagues have created a more detailed 3D computer model that shows that the snow can become a gas again as it falls and the temperature and pressure increase. Strong updraughts can then blow the titanium oxides back to the upper atmosphere. "The gas can come back on the top layers and snow again and again," says Parmentier.












Snowfall on HD 209458b would be like none you've ever seen. Though titanium dioxide is white and shiny, for example, the snowflakes would also contain silica oxides from the atmosphere, making them black. Since the atmosphere is also dark, snowstorms on the planet would be a smoky affair, the opposite of the white-outs we get on Earth. "It would be like being in the middle of a forest fire," says Parmentier.











Although the team studied a particular hot Jupiter, their model should apply equally to other planets of this type, suggesting hot snow is a common occurrence. Parmentier says we may have already spotted snow clouds on another hot Jupiter, HD 189733b, as spectral analysis of the planet suggests the presence of microscopic particles in its atmosphereMovie Camera.













David Sing of the University of Exeter, UK, who helped identify such particles on HD 189733b, says the team's new model goes a long way to explaining how titanium oxides behave on hot Jupiters. "We're pretty used to water condensing on Earth; there it is titanium because the temperatures are so much hotter."












Hot, black snow – now that would be something to wake up to.












Reference: http://arxiv.org/abs/1301.4522


















































If you would like to reuse any content from New Scientist, either in print or online, please contact the syndication department first for permission. New Scientist does not own rights to photos, but there are a variety of licensing options available for use of articles and graphics we own the copyright to.




































All comments should respect the New Scientist House Rules. If you think a particular comment breaks these rules then please use the "Report" link in that comment to report it to us.


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Cambodians bid farewell to ex-king ahead of cremation






PHNOM PENH: Thousands of Cambodians paid their last respects to their beloved former king Norodom Sihanouk as his body lay in state Saturday ahead of his cremation next week.

The mourners were able to glimpse the late monarch's gilded casket through doorways to the purpose-built crematorium where it was carried Friday in a lavish procession that brought Phnom Penh to a standstill.

His body will be kept at the crematorium until Monday when his wife and his son, current King Norodom Sihamoni, will start the cremation ceremony.

"I had the chance to pay my last respects to the King-Father," 65-year-old Sun Sopho, told AFP, with tears in her eyes, reflecting the sorrow of many who see Sihanouk as a force of stability over six turbulent decades.

"I asked his soul to bless us and to keep peace for the country forever."

The mercurial ex-monarch died of a heart attack aged 89 in Beijing on October 15 last year.

Sihanouk was just 18 when placed on the throne in 1941 by French colonial authorities, but quickly defied his patron's expectations of a pliant king.

A father of 14 children over six marriages, Sihanouk abdicated in 2004 after steering Cambodia through six decades marked by independence from France, civil war, the murderous Khmer Rouge regime, his own exile and finally peace.

Sihanouk -- a self-confessed "naughty boy" who loved to direct films, write poetry and compose songs -- remained hugely popular among Cambodians. But his record is not without controversy.

After being ousted by the US-backed General Lon Nol in 1970, he aligned himself with the Khmer Rouge, only to be placed under house arrest as the communist regime terrorised the nation.

Before the Vietnamese toppled the Khmer Rouge in 1979, Sihanouk took exile in China. He regained his throne in 1993, although his influence was greatly diminished and he abdicated in 2004 to be succeeded by Sihamoni.

-AFP/ac



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Powertrekk fuel cell charger to be released in Spring




PowerTrekk fuel cell charger

Along with a fuel cell puck, the PowerTrekk gives your iPhone a bit of juice. Just add water.



(Credit:
Lynn La/CNET)


While it's been circulating around at trade shows for a while, including Mobile World Congress 2011 and CES 2012, the PowerTrekk phone charger is slated to finally come to the U.S. at the end of this quarter.



Although the $229 device is peddled as a charger that can simply juice up your phone on water alone, it's not quite that simple.


To use the PowerTrekk, you also have to purchase a $4 PowerTrekk Pukk. Once you add a small amount of water (about half a shot), and add a one-time-use Pukk, the latter will immediately begin separating the hydrogen from the water, using it as fuel to charge your handset.


Each Pukk will produces 2.5 watts at 5 volts, which is good for about one full iPhone charge. If there is electricity available, however, you can also charge the separate internal battery in the PowerTrekk so it can power your phone later on.



Power your phone in an emergency




When I handled the unit at iWorld in San Francisco, it was indeed very lightweight despite its industrial look, and in a situation where there is no sun, I can see it coming in handy.


However, there is much debate about how useful a product like this can be. Not only is it rather cumbersome in shape, but you'll need to continually buy more Pukks in order to use the device multiple times. Compared to solar chargers and chargers that run on kinetic energy, this can become wasteful and pricey.


Read More..

Pictures We Love: Best of January

Photograph by Dieu Nalio Chery, AP

The magnitude 7 earthquake that struck near Port au Prince, Haiti, in January 2010 so devastated the country that recovery efforts are still ongoing.

Professional dancer Georges Exantus, one of the many casualties of that day, was trapped in his flattened apartment for three days, according to news reports. After friends dug him out, doctors amputated his right leg below the knee. With the help of a prosthetic leg, Exantus is able to dance again. (Read about his comeback.)

Why We Love It

"This is an intimate photo, taken in the subject's most personal space as he lies asleep and vulnerable, perhaps unaware of the photographer. The dancer's prosthetic leg lies in the foreground as an unavoidable reminder of the hardships he faced in the 2010 earthquake. This image makes me want to hear more of Georges' story."—Ben Fitch, associate photo editor

"This image uses aesthetics and the beauty of suggestion to tell a story. We are not given all the details in the image, but it is enough to make us question and wonder."—Janna Dotschkal, associate photo editor

Published February 1, 2013

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Gov's Handling of Sandusky Case Under Investigation













The newly-elected attorney general of Pennsylvania is going after the state's governor, Tom Corbett, who was attorney general when child sex allegations against Penn State coach Jerry Sandusky were first brought forward.


Kathleen Kane, a Democrat who was sworn in as attorney general on Jan. 15, said that she will name a special prosecutor in the coming days to investigate Corbett's handling of the Sandusky case. Corbett is a Republican.


The investigation will look specifically at why it took the attorney general's office three years to bring criminal charges against Sandusky while he continued to have access to children.


"Attorney General Kane will appoint a special prosecutor to lead the office's internal investigation into how the Sandusky child abuse investigation was handled by the Office of the Attorney General," Kane's office said in a statement released today.


Corbett's attorney general's office was first notified of the allegations against Sandusky in 2008 when a high school student told his mother and school that Sandusky had molested him. The local district attorney passed the allegation on to the attorney general, then Corbett. Corbett convened a grand jury.






Mario Tama; Patrick Smith/Getty Images











Jerry Sandusky Insists Innocence Before Sentencing Watch Video









Jerry Sandusky Sentencing: Why Did He Release Statement? Watch Video









Jerry Sandusky Claims Innocence in Audio Statement Watch Video





It wasn't until 2011 that sex abuse charges were filed against Sandusky while Corbett had since become governor. Sandusky was convicted on 45 counts of sex abuse in June 2012.


The charges sent shockwaves throughout Pennsylvania, as Penn State's president, two top officials, and legendary coach Joe Paterno all lost their jobs over the scandal.


"Why did it take 33 months to get Sandusky off the streets? Was the use of a grand jury the right decision? Why were there so few resources dedicated to the investigation? Were the best practices implemented?" the statement from Kane's office read.


"At the end of this investigation, we will know the answers to these questions and be able to tell the people of Pennsylvania the facts and give them answers that they deserve," the statement said.


Describing an interview Kane gave the New York Times, the Times said Kane suggested that Corbett did not want to upset voters or donors in the Penn State community before his gubernatorial run in 2009.


Corbett has denied those suggestions. His office did not immediately return calls for comment.


Kane's office preemptively fought back against the idea that the investigation is politically motivated. Kane, a Democrat, defeated the incumbent attorney general, Linda Kelly, a Republican in November 2011. Corbett is a Republican.


"The speculation that this is about politics is insane," a staff member in Kane's office told ABC News today. "You go anywhere in Pennsylvania and anywhere across the country and you'll find individuals asking, 'why did it take three years? Why was there a grand jury? Why make these kids talk to 30 different people about what happened?"



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