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"

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.

If you are having a technical problem posting a comment, please contact technical support.

Read More..

Three injured as plane veers off Rome runway

ROME: A Romanian plane carrying 50 passengers veered off the runway while landing at Rome's Fiumicino airport on Saturday, injuring three people who were rushed to hospital, authorities said.

The ATR 72 turboprop plane of the Romanian airline Carpatair arriving from Pisa finished up at an angle on grass with its landing gear damaged, emergency services and airport officials said.

One of the three people hospitalised, a Romanian flight crew member, was said to have suffered spinal injuries but his condition was not life-threatening.

Another of those hurt had pelvic injuries.

Investigators were attempting to establish the cause of the accident, with bad weather -- winds and rain may have made the landing difficult -- or pilot error suspected.

A passenger on the plane told Ansa that the plane had touched down twice. "The second time the landing gear was bent out of shape and we ended up off the runway."

He described scenes of panic and screaming.

The Rome airport remained open though one of its runways was closed.

According to Italian media, several recent incidents have shed an unfavourable light on the partnership between Alitalia and Carpatair.

The Carpatair plane involved in Saturday's accident was carrying out an Alitalia flight.

In a statement Alitalia said that "strong winds" had forced the plane off the runway and announced the suspension of all its flights operated by Carpatair from Pisa and Bologna.

Last month, a Carpatair flight between Ancona and Rome made an emergency landing soon after take-off.

Earlier in January, another of the Romanian company's planes was forced to make a U-turn following cabin pressure problems which obliged passengers to use oxygen masks.

On January 10 the company issued a statement, denying any reliability problems and denouncing a "media campaign" against it fuelled by "Italian trade unions and pilots" unhappy with Carpatair's partnership with Alitalia.

Carpatair signed the flight-sharing deal with Alitalia last September.

-AFP/ac

Read More..

Captor is caring for boy, Alabama sheriff says

STORY HIGHLIGHTS

• NEW: "Ethan's innocent ... let him go home," a Midland City resident says about the child


• The suspect has been identified as 65-year-old Jimmy Lee Dykes


• Dykes is accused of killing a school bus driver and abducting a 5-year-old


• Authorities have said there is no connection between Dykes and the boy

Midland City, Alabama (CNN) -- As an armed standoff dragged into its fifth day Saturday, authorities negotiated through a ventilation pipe with a man accused of barricading himself and a 5-year-old hostage in an underground bunker in southeastern Alabama.

Police have been tight-lipped about a possible motive since the hostage drama began unfolding in Midland City with the shooting of school bus driver and the abduction of the 5-year-old, Ethan.

In a sign of perhaps how tense negotiations are between authorities and the suspect, officials have refused to detail what, if any, demands have been made by the suspect.

Michelle Riley, a resident of Midland City, pleaded for the suspect to let the boy go.

"He just needs to know that ... everybody makes mistakes. Everybody's been through life events that changes them, but Ethan's innocent. You know, let him go home to his mother. Let him go home to his grandparents. Let him come out to the community. Let him go back to school and be with his friends," she said.

On Friday, the Dale County sheriff confirmed what neighbors have been saying and local news outlets have been reporting since the standoff began -- the suspected gunman's identity.

Charles Poland was fatally shot in Alabama on Tuesday.

Suspect Jimmy Lee Dykes, 65, is a Vietnam War veteran and retired truck driver.

'We don't want to make any mistakes,' Ala. governor says

He is Jimmy Lee Dykes, 65, a Vietnam veteran and retired truck driver who moved to the area about five years ago.

The sheriff's department released a photo of a gray-bearded, unsmiling Dykes and brief physical description: white male, 6 feet tall, weighing 170 pounds with brown eyes and gray hair.

Officials have been in "constant communication" with Dykes, Sheriff Wally Olson said Saturday. Dykes has told police that he has an electric heater and blankets for the boy. The sheriff publicly thanked Dykes for taking care of the child.

This much is known, according to police and witness statements: On Tuesday at about 3:40 p.m., bus driver Charles Poland Jr. was shuttling children from school to their homes when he dropped children off and the gunman boarded the bus.

The gunman demanded that Poland, 66, hand over two children. Poland refused, blocking access to the bus's narrow aisle as at least 21 children escaped out of the back emergency door, according to police.

The gunman shot Poland four times, killing him; grabbed the boy and then barricaded the two of them inside a nearby bunker.

It's unclear whether the gunman was after a specific child on the bus. Police have said there is no connection between the suspect and the abducted boy, whose identity is being withheld.

The suspect, who police have identified as Dykes, is holed up in a bunker 4 feet underground and built at least partially out of PVC pipe, authorities have said.

A hostage negotiator has been communicating with the alleged gunman through a 60-foot-long plastic ventilation pipe in an effort to end the standoff.

Authorities believe the boy is physically unharmed.

The suspect agreed to let police send down coloring books, crayons and prescription medication that the boy needs for treatment for Asperger's syndrome and attention deficit disorder, State Rep. Steve Clouse told CNN.

Neighbors have said the bunker has electricity, and Dykes has been known to stay in it for up to eight days, said James Arrington, the police chief in nearby Pinckard.

Dykes has been described as a self-styled survivalist with "anti-government" views, according to the Southern Poverty Law Center's Hatewatch.

As negotiations continue, preparations were under way for Poland's funeral.

The late school bus driver will be memorialized Saturday night at a visitation service, followed by a funeral service Sunday at the Ozark Civic Center.

Alabama Gov. Robert Bentley praised Poland for protecting the children on his bus.

"He stood in that place, and when that man came to take two children, he said no. And he lost his life because of that ... he did his job, and I'm proud of him as the governor but I'm just proud of him as a human being," he said.

CNN's George Howell reported from Midland City and Chelsea J. Carter wrote from Atlanta. CNN's Joe Sutton, Greg Botelho and Tristan Smith contributed to this report.

Read More..

Bus hits overpass in Boston, injuring passengers

In this photo released by the Boston Fire Department via Twitter, firemen work to remove injured passengers from a bus that hit an bridge as it traveled along Soldiers Field Road in the Allston neighborhood of Boston Saturday night, Feb. 2, 2013. / AP Photo/Boston Fire Department

Updated 9:33 PM ET

BOSTON A charter bus full of passengers struck a bridge in Boston on Saturday night, injuring several people, authorities said.

The bus carrying 42 people was coming from Harvard University and was heading back to Pennsylvania when it struck an overpass in the Allston neighborhood shortly before 8 p.m., according to the Boston Fire Department.

Massachusetts State Police said several people aboard the bus were injured, though it had no immediate details on the nature of the injuries.

State Police said the Calvary Coach Bus out of Philadelphia was too high for the roadway. A spokesman for the bus company said he had no immediate information on the crash.

Photos posted on the Fire Department's website showed firefighters extracting people from the bus.

The accident happened on Soldiers Field Road, a major crosstown roadway in Boston that curves along the Charles River and passes by Harvard and Boston University. It is a major roadway to the Massachusetts Turnpike

Read More..

Body of Missing Mom Reportedly Found in Turkey

The body of an American woman who went missing while on a solo trip to Turkey has been pulled from a bay in Istanbul, and nine people have been held for questioning, according to local media.

Sarai Sierra, 33, was last heard from on Jan. 21, the day she was due to board a flight home to New York City.

The state-run Andolu Agency reported that residents found a woman's body today near the ruins of some ancient city walls in a low-income district, and police identified the body as Sierra.

Rep. Michael Grimm, R-NY, who with his staff had been assisting the Sierra family in the search, said he was "deeply saddened" to hear the news of her death.

"I urge Turkish officials to move quickly to identify whomever is responsible for her tragic death and ensure that any guilty parties are punished to the fullest extent of the law," he said in a statement.

Courtesy Sarai Sierra's family

Footage Shows Missing New York Mom in Turkish Mall Watch Video

NYC Woman Goes Missing While Traveling In Turkey Watch Video

New York Mother Goes Missing on Turkish Vacation Watch Video

The New York City mother, who has two young boys, traveled to Turkey alone on Jan. 7 after a friend had to cancel. Sierra, who is an avid photographer with a popular Instagram stream, planned to document her dream vacation with her camera.

"It was her first time outside of the United States, and every day while she was there she pretty much kept in contact with us, letting us know what she was up to, where she was going, whether it be through texting or whether it be through video chat, she was touching base with us," Steven Sierra told ABC News before he departed for Istanbul last Sunday to aid in the search.

Steven Sierra has been in the country, meeting with U.S. officials and local authorities, as they searched for his wife.

On Friday, Turkish authorities detained a man who had spoken with Sierra online before her disappearance. The identity of the man and the details of his arrest were not disclosed, The Associated Press reported.

The family said it is completely out of character for the happily married mother, who met her husband in church youth group, to disappear.

She took two side trips, to Amsterdam and Munich, before returning to Turkey, but kept in contact with her family the entire time, a family friend told ABC News.

Further investigation revealed she had left her passport, clothes, phone chargers and medical cards in her room at a hostel in Beyoglu, Turkey.

Read More..

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 atmosphere.

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.

If you are having a technical problem posting a comment, please contact technical support.

Read More..

Mystery persists in Mexico oil firm blast after 33 die

MEXICO CITY: The cause of a deadly explosion at the headquarters of Mexico's state-owned oil firm remained shrouded in mystery Friday, with authorities investigating if it was an accident or an attack 24 hours later.

As the toll jumped to 33 dead and 121 injured, government and Pemex company officials had yet to pinpoint what was behind the blast that ripped through the annex of the firm's Mexico City skyscraper Thursday afternoon.

The blast erupted amid a debate over plans by President Enrique Pena Nieto to modernize Pemex and attract more outside investments to the old state monopoly, which has suffered deadly industrial accidents as recently as last year.

"The government is determined to find the truth in this incident, whatever it is; whether it was an accident, whether it was carelessness, whether it was an attack," Attorney General Jesus Murillo Karam told a news conference.

"We don't want to leave anything to the imagination," he said as rescuers wound down the search, with rescuers focusing on two final locations. The last body was pulled out of the rubble at around noon.

Earlier, Pemex director general Emilio Lozoya Austin said the explosion appeared to have been an accident, though he insisted that all lines of investigation remained open.

"It appears that this is what one can observe as part of what experts refer to as an accident," he told the Televisa network.

A civil protection spokesman told AFP Thursday that witnesses had reported a gas build-up in an electricity supply room, but it was unclear whether it was the source of the disaster.

Pemex had indicated before the blast was confirmed that the building was evacuated due to an electrical failure.

Murillo Karam said there was no evidence of fire in the victims or debris. Investigators from the army, navy, federal police, prosecutor's office and two foreign firms were involved in the probe.

Hundreds of firefighters, police and soldiers aided by dogs dug through rubble for almost 24 hours straight, with the help of floodlights and cranes after the blast caused the mezzanine of the annex to collapse.

Thousands of people work in the Pemex complex, but officials said the area hit by the blast has four levels and housed 200 to 250 employees.

The government said two more locations were to be searched after they sifted through 39. Mexican Red Cross coordinator Isaac Oxenhaut had indicated earlier that the mission to rescue survivors or search for bodies was over.

"We did a sweep with other organizations, we brought dogs again," he told reporters. "We rule out there being any trapped victims."

Soldiers spent the day clearing mounds of debris from the area, which was strewn with piles of concrete, computers and office furniture.

The Mexican Congress held a minute of silence while Pemex said 52 people remained in hospitals.

Officials stressed that the blast will not interrupt production at the oil giant, the world's fourth-largest crude producer with an output of around 2.5 million barrels per day.

David Shields, a Pemex expert and author of the book "Pemex: The Oil Reform," said whatever the investigation determines will influence the debate over the company's future.

"If it was an attack, the repercussions will be on national security. If they determine that it was a maintenance problem, they will have to establish if it was the failure of the union or a contractor," Shields told AFP.

Pena Nieto has not given details about his plans for Pemex, but he insists it will not be privatized.

The company has experienced deadly accidents at its oil and gas facilities in the past. Last year, a huge explosion killed 30 people at a gas plant near the northern city of Reynosa, close to the US border.

The previous worst incident took place in December 2010, when an oil pipeline exploded after it was punctured by thieves in the central town of San Martin Texmelucan, leaving 29 dead and injuring more than 50.

In October 2007, 21 Pemex workers died during a gas leak on an oil platform in the Gulf of Mexico. Most drowned when they jumped into the sea in panic.

-AFP/ac

Read More..

Parole board: Release member of 'Manson family'

By Michael Martinez and Kyung Lah, CNN

updated 8:33 PM EST, Fri February 1, 2013

Bruce Davis was sent to prison on April 21, 1972, for the 1969 first-degree murders of two men.

STORY HIGHLIGHTS

• "He earned it," defense attorney says of recommendation


• California parole board formally recommends parole for Bruce Davis, 70


• Governor must modify, affirm or reverse the recommendation in 30 days


• Davis is serving a life sentence for 1969 first-degree murders of two men

(CNN) -- California Gov. Jerry Brown is considering whether to grant parole to a convicted murderer who followed notorious killer Charles Manson, a spokeswoman for the governor said.

Brown's office received a formal recommendation from the state board parole Friday to release Bruce Davis, 70, who would be the first Manson "family" member to secure freedom solely for good behavior.

Brown has 30 days -- or until March 3 -- to either modify, affirm or reverse the parole board's recommendation, a corrections spokeswoman said.

In 2010, Davis secured his first formal recommendation for parole by the state board, but then-Gov. Arnold Schwarzenegger reversed the board's decision.

Davis was sent to prison on April 21, 1972, for the 1969 first-degree murders of musician Gary Hinman and stuntman Donald "Shorty" Shea. Davis is serving a life sentence.

Michael Beckman, Davis' attorney, urged Brown to grant parole.

If the case were not connected to Charles Manson, Davis would have already been released by now, Beckman said. He called it "not fair."

"He earned it," Beckman said.

Charles Manson: The infamous inmate

HIDE CAPTION

"I think the governor should respect the work by his parole board. That hearing took five or six hours. They took into account everything about Bruce. And they didn't grant him parole as a favor. They didn't grant him parole on a whim. They considered it very carefully," Beckman said.

In 2010, the parole board said that Davis had not been disciplined since 1980 and participated in all available education, vocation and self-help programs.

Davis is one of several imprisoned followers of Manson, 78, who is serving a life sentence for nine murders.

Manson led his "family" of followers in a deadly spree in 1969, whose victims included eight-months-pregnant actress Sharon Tate.

Last year, Manson was denied parole for the 12th time.

Manson, whose gruesome killings inspired the best-selling book "Helter Skelter," will be up for parole again 15 years from now, when he would be 92.

CNN's Michael Cary contributed to this report.

Read More..

Egypt protesters, police clash at presidential palace

CAIRO Protesters denouncing Egypt's Islamist president hurled stones and firebombs through the gates of his palace gates on Friday, clashing with security forces who fired tear gas and water cannons, as more than a week of political violence came to Mohammed Morsi's symbolic doorstep for the first time.

The streets outside the presidential palace were a scene of mayhem for hours into the night.

Security forces pumped volley after volley of tear gas, set fire to protester tents and at one point dragged a protester to the ground, stripped him and beat him. Protesters burned tires and hurled stones and fireworks. A 23-year-old died when he was shot in the chest and forehead, the Health Ministry said.

The march on the palace, where Morsi was not present, was part of a wave of demonstrations in cities around the country called by opposition politicians, trying to wrest concessions from Morsi after around 60 people were killed in protests, clashes and riots.

But many of the protesters go further, saying he must be removed from office, accusing his Muslim Brotherhood of monopolizing power and failing to deal with the country's mounting woes. Many have been further angered by Morsi's praise of the security forces after the high death toll, which is widely blamed on excessive use of force by the police.

The day's unrest, however, risked boosting attempts by the government and Brotherhood to taint the opposition as violent and destructive -- a tack Morsi supporters have taken for weeks.

In a statement issued amid the clashes, Morsi accused protesters of trying to break ito the palace and said "political fores involved in incitement" are responsible for the violence. He called on all factions to condemn the violence and said security forces would "act decisively to protect state institutions."

A day earlier, the top opposition figures met with the Brotherhood for the first time and agreed on a joint promise to avoid violence. That drew sharp criticism from many anti-Morsi activists who said the politicians had played into the Brotherhood's hands and given legitimacy to any crackdown.

The fighting started when a crowd of several thousand marched to the palace in an upscale district of the capital, chanting, "the people want the fall of the regime," and "leave, leave, Morsi." Security forces allowed them to reach close to the main gate, and some protesters hurled shoes and stones through the fence into the grounds. Some climbed on the fence, apparently to better throw stones, but it did not appear they were breaking in.

At first, police and Republican Guards inside did not respond. But when several firebombs were thrown over the fence, the security forces unleashed water cannons, then tear gas, then riot police descended on the streets outside the palace.

Hours of clashes ensued, with streams of tear gas and stones flying through the air as security forces pushed the protesters back. A particularly heavy volley of dozens of tear gas canisters over a few minutes scattered much of the crowd, fleeing into side streets as riot police pursued and the sound of birdshot being fired echoed. Associated Press footage showed police stripping one protester on the ground and kicking him before dragging him into a van.

The Interior Ministry, in charge of police, later said in a statement that it would investigate the incident, calling it "regrettable and unacceptable."

More than 50 people were hurt during demonstrations around the country, the Health Ministry said.

The turmoil was the first significant violence at the presidential palace in the eight-day wave of protests -- though the site was the scene of clashes in November between anti-Morsi protesters and Islamists that left around 10 people dead. But other protests around the country on Friday did not see significant violence.

1/2

Read More..

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?"

Read More..