Death toll in Mexico oil firm blast rises to 25

MEXICO CITY - A huge blast rocked the headquarters of Mexican state-owned oil giant Pemex on Thursday, killing at least 25 people, injuring 100 and leaving rescuers scrambling to find survivors into the night.

Smoke billowed skyward as people fled the 54-floor Mexico City skyscraper, with some of those hurt in the blast being carried out on stretchers and office chairs, as witnesses recalled an earthquake-like rumble shaking the floor.

Windows broke on several lower floors, scattering debris. The company said the cause of the deadly incident was under investigation and declared that any reports on the origin of the blast amounted to speculation.

Officials said the blast ripped through an annex at around 3:40 pm (2140 GMT), causing severe damage to three floors. Witnesses said a roof connecting the annex to the tower collapsed. Thousands of people were evacuated.

As night fell, floodlights shone on the rubble and two cranes were brought to help rescuers find survivors.

Almost six hours after the blast, President Enrique Pena Nieto said on Twitter that "one more person was rescued alive in the rubble."

"I don't have any conclusive report on the cause, which is why I insist against any speculation," Pena Nieto told reporters after visiting the site.

A spokesman for the civil protection agency said there was an apparent "accumulation of gas" in an electrical supply room, but the exact cause of the blast has yet to be confirmed.

Interior Minister Miguel Angel Osorio Chong told a news conference that 17 women and eight men had died, and that 101 people had been injured.

Almost eight hours after the blast, he said it was hard to know if anybody was still trapped in the rubble.

Pena Nieto ordered that the rescue continue "to the last piece of debris, to be sure that there is not one single person trapped under," the minister said.

Emergency workers with rescue dogs, helicopters and several ambulances were at the scene in the capital, a city that is equipped to handle earthquakes.

Pemex said on Twitter that the explosion hit the ground floor and mezzanine of the tower's annex.

"We had two minutes to leave the building. I was headed to the pharmacy when the windows broke. It was a deafening noise," Astrid Garcia Trevino, who worked in the annex, told AFP. "The floor shook as if it was an earthquake."

Some witnesses told local media that a number of people were trapped in rubble.

"It was dramatic. The building was shaking and suddenly there was debris. We couldn't even see the people next to us," Pemex employee and union member Cristian Obele told reporters.

"Windows broke, people were injured and a lot of people were in shock," an unidentified worker told the Televisa channel, describing the impact of the "very strong explosion."

Mayor Miguel Angel Mancera and several top federal officials headed to the scene, as authorities closed off the avenue in front of the tower.

"I deeply regret the death of Pemex workers," Pena Nieto said on Twitter. "The priority at the moment is to help the injured and protect the people working there."

Pemex, the world's fourth-largest crude producer with around 2.5 million barrels per day, said the administrative centre would remain closed "until further notice," after it had earlier been evacuated due to a power failure.

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/ir

Read More..

Microsoft's tablet blip versus Android's boom

Android-based tablets like Amazon's Kindle Fire are becoming very popular just as Microsoft enters the tablet market.

(Credit:
Amazon)

As Android tablet shipments surge, probably the best thing that can be said about Microsoft is that it's not going away.

Android
tablet shipments totaled about 30 million in the fourth quarter, IDC reported today. And that number (total market) jumps to 50 million if you throw in Apple's
iPad.

"There is no question that Microsoft is in this tablet race to compete for the long haul," an IDC analyst said today in a statement, trying to put Microsoft's tablet debut into perspective.

In fact, that's probably about as positive a statement that can be made at the moment.

Then this: "Reaction to the company's Surface with Windows RT tablet was muted at best," IDC added.

Muted in this case amounts to 900,000 units shipped "into the channel."

So, how does that compare with other major vendors just entering the market? Amazon shipped about 4.7 million Kindle Fire tablets in the fourth quarter of 2011 when that $199 tablet debuted.

And Asus, which makes Google's
Nexus 7 tablet, shipped 3.1 million tablets in the fourth quarter of 2012, the quarter after the Nexus 7's debut. Many if not most of those are undoubtedly the Nexus 7.

Throw in the market totals that IDC reported today (Amazon shipped about 6 million last quarter and Samsung almost 8 million) and it's clear that Android tablets are not only leaving a bigger footprint in the market but are also even eroding Apple's share.

That leaves Microsoft as a blip amid an Android boom.

How does Microsoft gain on Android? Lower prices might help.

"We believe that Microsoft and its partners need to quickly adjust to the market realities of smaller screens and lower prices," IDC said.

And what about the long haul? "In the long run, consumers may grow to believe that high-end computing tablets with desktop operating systems are worth a higher premium than other tablets," IDC added.

That could indeed be a long haul.

Will Microsoft's upcoming Windows 8 Surface Pro with laptop-like performance sell in large numbers? We'll see. But with a starting price of $899, it's certainly not a bargain compared with Android tablets.

(Credit:
Microsoft)

Read More..

Sinkhole Swallows Buildings in China

Photograph from AFP/Getty Images

The sinkhole that formed in the southern Chinese city of Guangzhou (pictured) is, unfortunately, not a new occurrence for the country.

Many areas of the world are susceptible to these sudden formations, including the U.S. Florida is especially prone, but Guatemala, Mexico, and the area surrounding the Dead Sea in the Middle East are also known for their impressive sinkholes. (See pictures of a sinkhole in Beijing that swallowed a truck.)

Published January 31, 2013

Read More..

Arias' Lawyer Shows Ex-Boyfriend's Lewd Photos

Accused murderer Jodi Arias was kept away from the Mormon friends of her lover Travis Alexander and their torrid sex affair was kept secret by Alexander, even as he sent lewd photos of himself to her online, according to court testimony today.

The testimony in Arias' trial for killing Alexander in 2008 was intended to bolster the defense's argument that she killed him in self defense, that Alexander was a sexual deviant who treated Arias as his "dirty little secret."

Arias' attorneys introduced as evidence photos that Alexander took of his penis and sent to Arias, part of a string of graphic messages and sexual phone calls the two engaged in while Alexander, an elder in the Mormon church, was supposed to be chaste.

Today's witness was the latest in a string called by the defense, including Alexander's former girlfriend Lisa Daidone, who told the court that Alexander had professed to be a virgin.

Daniel Freeman continued his testimony today, describing how he was a friend of both Arias and Alexander but that Alexander kept Arias distanced from his Mormon pals.

"Travis had made more friends at (the Mormon) ward, and had (Ultimate Fighting Championship) fight nights at his house many times, and Jodi was in town, but she wasn't there," Freeman said.

"There was that group of friends, them and Jodi, two different groups, and so Lisa [Daidone] and friends from church were there, but Jodi wasn't there," Freeman said.

Jodi Arias Murder Trial: Former Boyfriend Takes Stand Watch Video

Jodi Arias Murder Trial: Defense's First Day of Witnesses Watch Video

Alexander's behavior, the defense hopes to prove, shows that he mistreated Arias.

Arias, 32, is on trial for murdering Alexander, whom she dated for a year and continued to have a sexual relationship for a year after that. Her attorneys claim that Alexander was abusive and controlling toward Arias, and that she was forced to kill him.

Freeman described how he took a trip with his sister, Alexander, and Arias, and how Alexander had asked him to come along so that he and Arias "would not get physical."

"I don't know that I can say he didn't want to be alone with her, but he liked that when I was there, and my sister was there. They weren't as physical," Freeman said.

Freeman admitted that he had no idea Alexander and Arias had been having a sexual relationship the entire time they were together. He said Alexander never mentioned that to his friends.

In fact, Freeman noted that Alexander was considered to be a church elder when he baptized Arias into the Church of Latter-Day Saints. Both a church elder and a convert were expected to abide by the church's strict law of chastity, which banned any sexual relations outside of marriage.

"One thing people give up in this baptism process was sex," prosecutor Juan Martinez said. "Did you know she was having oral sex with Mr. Alexander at the time of her baptism? Would that be an insincere baptism?"

"She would not be ready to be baptized in that case," Freeman said.

"You were asked about Miss Arias, whether she was worthy of baptism if she was performing oral sex, but what about the elder receiving oral sex?" defense attorney Kirk Nurmi said.

"They would not be worthy of performing that ordinance at that time until they had gone through repentance," Freeman said. "They would go to a discipline council and could face excommunication or a probation period or have their priesthood removed."

Freeman said that Alexander never confessed to having a sexual relationship with Arias.

Freeman's testimony came on the third day of the defense's attempt to paint Alexander as a controlling, sex-obsessed liar who was cruel to Arias. Other witnesses have said that Alexander cheated on other women he dated with Arias, and lied to his friends and family about their relationship.

The defense also had Freeman point out that Alexander was strong and fit. They are expected to conclude that Alexander was physically threatening Arias when she killed him.

Read More..

Today on New Scientist: 30 January 2013

Timbuktu's precious scientific texts must be saved

Islamist militants in Mali have burned documents that attest to science in Africa before European colonisation - what remains must be protected

Think that massage feels good? Try adding drugs

Nerve bundles that respond to stroking have been identified and chemically activated in mice

How Obama will deliver his climate promise

The US is set to meet - and maybe exceed - Obama's pledge to cut US emissions by 17 per cent, which could give a boost to international climate talks

Minimum booze price will rein in alcohol abuse

Evidence suggests the UK government's proposal to set a minimum price for alcohol could save thousands of lives, and billions of pounds of public money

First real time-travel movies are loopers

Hollywood has played with time travel for decades, but now physicists have the first movies of what travelling to the past actually looks like

Surfer rides highest wave ever caught

Garret McNamara of Hawaii claims to have ridden the highest wave ever caught by a surfer, a 30-metre monster off the coast of Nazaré, Portugal

Infrared laptop trackpad ignores accidental touches

Longpad is a touchpad that extends the full width of your laptop and uses infrared sensors to ignore any unwanted touches

Close call coming: Averting the asteroid threat

With an errant space rock heading this way, just how good are our asteroid defences - and how do we avert the cataclysm?

The right to fight: women at war

The US military has accepted women into combat. What can science tell us about how women deal with being in the line of fire? And are they any different to men?

Earth and others lose status as Goldilocks worlds

Several planets are taking a hit thanks to a redefinition of the habitable zone - the area around a star in which liquid water can theoretically exist

The 10,000-year bender: Why humans love a tipple

Our taste for alcohol results from an evolutionary tussle between humans and yeast - one in which the microbes have often had the upper hand

Read More..

Basketball: Heat scorch Nets 105-85

NEW YORK: LeBron James and the NBA champion Miami Heat ended the Brooklyn Nets' home winning streak in emphatic style Wednesday with a 105-85 triumph at the Barclays Centre.

The Heat shot 51.8 percent from the field and made 11-of-19 from three-point range to notch their 13th straight victory over the Nets -- including a sweep of all three regular-season games on the schedule in this campaign.

Miami bounced back from a double-overtime loss at Boston on Sunday, and halted the Nets' eight-game home winning streak.

Hours after Nets forward Reggie Evans said during his team's morning shoot-around that the Heat's 2012 title was devalued because it came in a lockout-shortened season, the champs showed they remain a cut above.

James scored 24 points with nine rebounds and seven assists. Dwyane Wade added 21 points and Chris Bosh scored 16 for a Miami team that broke open a close game with a 36-14 third quarter.

Brook Lopez, named to the All-Star game in place of injured Rajon Rondo of Boston on Wednesday, scored 21 points and Joe Johnson contributed 16. But the Nets were undone by 19 turnovers, including eight in the key third period.

The Heat continue a four-game road trip on Friday at Indiana and wrap it up on Sunday at Toronto.

-AFP/fl

Read More..

IBM's Watson heads to school

To borrow from Hugh Gallagher's famous take on the university admissions essay, IBM's Watson computer has played Jeopardy with a Congressman, has offered medical advice to doctors, and has spoken with late-night TV stars. But it has not yet gone to college.

Till now, that is.

IBM announced today that it would, for the first time, be providing a modified version of a Watson system to a university: Rensselaer Polytechnic Institute.

The system will "afford faculty and students an opportunity to find new uses for Watson and deepen the system's cognitive capabilities," Big Blue said in a press release.

Watson, of course, is the system that made a splash in 2011, when it crushed its human competitors on the Jeopardy game show. The system has, as IBM puts it, "a unique ability to understand the subtle nuances of human language, sift through vast amounts of data, and provide evidence-based answers to its human users' questions."

Since its Jeopardy triumph, Watson has been eyeballed for health-care duty -- including help with diagnosing cancer -- banking functions; and even telemarketing.

Read More..

New Theory on How Homing Pigeons Find Home

Jane J. Lee

Homing pigeons (Columba livia) have been prized for their navigational abilities for thousands of years. They've served as messengers during war, as a means of long-distance communication, and as prized athletes in international races.

But there are places around the world that seem to confuse these birds—areas where they repeatedly vanish in the wrong direction or scatter on random headings rather than fly straight home, said Jon Hagstrum, a geophysicist who authored a study that may help researchers understand how homing pigeons navigate.

Hagstrum's paper, published online Wednesday in the Journal of Experimental Biology, proposes an intriguing theory for homing pigeon disorientation—that the birds are following ultralow frequency sounds back towards their lofts and that disruptions in their ability to "hear" home is what screws them up.

Called infrasound, these sound waves propagate at frequencies well below the range audible to people, but pigeons can pick them up, said Hagstrum, who works at the U.S. Geological Survey in Menlo Park, California.

"They're using sound to image the terrain [surrounding] their loft," he said. "It's like us visually recognizing our house using our eyes."

Homeward Bound?

For years, scientists have struggled to explain carrier pigeons' directional challenges in certain areas, known as release-site biases.

This "map" issue, or a pigeon's ability to tell where it is in relation to where it wants to go, is different from the bird's compass system, which tells it which direction it's headed in. (Learn about how other animals navigate.)

"We know a lot about pigeon compass systems, but what has been controversial, even to this day, has been their map [system]," said Cordula Mora, an animal behavior researcher at Bowling Green State University in Ohio who was not involved in the study.

Until now, the two main theories say that pigeons rely either on their sense of smell to find their way home or that they follow the Earth's magnetic field lines, she said.

If something screwed up their sense of smell or their ability to follow those fields, the thinking has been, that could explain why pigeons got lost in certain areas.

But neither explanation made sense to Hagstrum, a geologist who grew interested in pigeons after attending an undergraduate lecture by Cornell biologist William Keeton. Keeton, who studied homing pigeons' navigation abilities, described some release-site biases in his pigeons and Hagstrum was hooked.

"I was just stunned and amazed and fascinated," said Hagstrum. "I understand we don't get dark matter or quantum mechanics, but bird [navigation]?"

So Hagstrum decided to look at Keeton's pigeon release data from three sites in upstate New York. At Castor Hill and Jersey Hill, the birds would repeatedly fly in the wrong direction or head off randomly when trying to return to their loft at Cornell University, even though they had no problems at other locations. At a third site near the town of Weedsport, young pigeons would head off in a different direction from older birds.

There were also certain days when the Cornell pigeons could find their way back home from these areas without any problems.

At the same time, homing pigeons from other lofts released at Castor Hill, Jersey Hill, and near Weedsport, would fly home just fine.

Sound Shadows

Hagstrum knew that homing pigeons could hear sounds as low as 0.05 hertz, low enough to pick up infrasounds that were down around 0.1 or 0.2 hertz. So he decided to map out what these low-frequency sound waves would have looked like on an average day, and on the days when the pigeons could home correctly from Jersey Hill.

He found that due to atmospheric conditions and local terrain, Jersey Hill normally sits in a sound shadow in relation to the Cornell loft. Little to none of the infrasounds from the area around the loft reached Jersey Hill except on one day when changing wind patterns and temperature inversions permitted.

That happened to match a day when the Cornell pigeons had no problem returning home.

"I could see how the topography was affecting the sound and how the weather was affecting the sound [transmission]," Hagstrum said. "It started to explain all these mysteries."

The terrain between the loft and Jersey Hill, combined with normal atmospheric conditions, bounced infrasounds up and over these areas.

Some infrasound would still reach Castor Hill, but due to nearby hills and valleys, the sound waves approached from the west and southwest, even though the Cornell loft is situated south-southwest of Castor Hill.

Records show that younger, inexperienced pigeons released at Castor Hill would sometimes fly west while older birds headed southwest, presumably following infrasounds from their loft.

Hagstrum's model found that infrasound normally arrived at the Weedsport site from the south. But one day of abnormal weather conditions, combined with a local river valley, resulted in infrasound that arrived at Weedsport from the Cornell loft from the southeast.

Multiple Maps

"What [Hagstrum] has found for those areas are a possible explanation for the [pigeon] behavior at these sites," said Bowling Green State's Mora. But she cautions against extrapolating these results to all homing pigeons.

Some of Mora's work supports the theory that homing pigeons use magnetic field lines to find their way home.

What homing pigeons are using as their map probably depends on where they're raised, she said. "In some places it may be infrasound, and in other places [a sense of smell] may be the way to go."

Hagstrum's next steps are to figure out how large an area the pigeons are listening to. He's also talking to the Navy and Air Force, who are interested in his work. "Right now we use GPS to navigate," he said. But if those satellites were compromised, "we'd be out of luck." Pigeons navigate from point to point without any problems, he said.

Read More..

No Device Eliminates Concussion Risk, Experts Say

As the long-term consequences of concussions become clearer, a cottage industry has popped up to sell athletes and worried parents products designed to mitigate risks of concussions that even helmets cannot prevent.

Despite the bold claims of some companies, however, many experts say the Holy Grail in contact sports -- a device that prevents concussions -- simply does not exist. Indeed, experts say, there is no proof that any current device significantly reduces the risk of concussions beyond the protections already provided by helmets.

"Nightline" found several products for sale online that aim to reduce the risk of concussions or even alert parents and coaches when a kid has supposedly taken a concussion-level hit. The claims the manufacturers make are often breathtakingly reassuring.

Concern about the risk of concussion is mounting at every level of the gridiron from the NFL to colleges and even high schools. Concussions are the most common injury among high school football players.

Jennifer Branin, whose son Tyler Branin is one of the stars of the Woodbridge Warriors high school football team in Irvine, Calif., said "it was scary" the first time he had a concussion.

"He had lost his balance on the field," she said. "He got up and tried to continue, but couldn't keep his balance."

Vanished Abroad: US Woman Missing in Turkey Watch Video

She said the effects of the concussion lingered, causing Tyler to miss a week of school and football practice. Even months later, he complained of difficulty concentrating in class.

Parents such as Jennifer Branin, who is president of the team's booster club, and her husband, Andy Branin, a former college football player himself, were looking for a way to support their son's desire to play football while also keeping him safe.

"He wants to play and, as a mom, you may want to put bubble-wrap around them and protect them forever, but that's not going to happen," she said.

So Jennifer Branin decided to do something. She raised money to buy the team helmet inserts by Unequal Technologies for added protection.

Unequal Technologies, one of the highest profile players in this new market, described its product explicitly on the box as "Concussion Reduction Technology," or "CRT." It is a strip of composite material including bullet-proof Kevlar that is designed to stick inside the helmet as a liner to the existing helmet pads.

Unequal Technologies uses its material in products ranging from padded sleeves to shin guards. The company counts NFL players and X-Games athletes among its fans.

On board as paid spokesmen are Philadelphia Eagles quarterback Michael Vick and James Harrison, a linebacker for the Pittsburgh Steelers. Harrison is one of the hardest-hitting guys in the NFL and said he uses Unequal Technology's liners in his helmet.

"I don't know what it's made of but it works," Harrison says in one of Unequal's promotional videos. "I really don't feel like I'm taking a risk."

Vick wasn't wearing the CRT product when he suffered a season-ending concussion in November, but he has since promised that he will be wearing it when he returns to the field next season.

Rob Vito, founder and CEO of the Kennett Square, Pa.-based company, said he worked with scientists to create a military-grade composite material that can help protect athletes from all kinds of injuries from head to toe.

Read More..

Today on New Scientist: 29 January 2013

Creatures of the air caught in the mist

Photographer Todd Forsgren uses mist nets to briefly ensnare a variety of tropical South American birds before releasing them, unharmed

Drug reduces enlarged prostate with few side effects

Shrinking enlarged prostates by blocking a potent growth factor could avoid problems - such as erectile dysfunction - that accompany current treatments

Climate change blamed for Australia's extreme weather

Floods have hit the east coast of Australia before recent bush fires have been put out, giving people a taste of climate change's possible consequences

Midnight sun: How to get 24-hour solar power

Rust may be the scourge of electronics but it could help solar power run all night

The most beautiful explanations

The 2012 Edge questions asked for great thinkers' favourite explanations. This Explains Everything collects them all into a fascinating read

Netted Costa Rican birds pay small price for art

Only mildly traumatic, mist nets offer an easy and safe way to catch birds for artistic, and ecological, study

Iran launches monkey into space

The Iranian Space Agency claims to have launched a rhesus monkey into space on a sub-orbital flight, and returned it safely to Earth

Read More..