Get cirrus in the fight against climate change

FEATHERY cirrus clouds are beautiful, but when it comes to climate change, they are the enemy. Found at high-altitude and made of small ice crystals, they trap heat - so more cirrus means a warmer world. Now it seems that, by destroying cirrus, we could reverse all the warming Earth has experienced so far.

In 2009, David Mitchell of the Desert Research Institute in Reno, Nevada, proposed a radical way to stop climate change: get rid of some cirrus. Now Trude Storelvmo of Yale University and colleagues have used a climate model to test the idea.

Storelvmo added powdered bismuth triiodide into the model's troposphere, the layer of the atmosphere in which these clouds form. Ice crystals grew around these particles and expanded, eventually falling out of the sky, reducing cirrus coverage. Without the particles, the ice crystals remained small and stayed up high for longer.

The technique, done on a global scale, created a powerful cooling effect, enough to counteract the 0.8 °C of warming caused by all the greenhouse gases released by humans (Geophysical Research Letters, DOI: 10.1002/grl.50122).

But too much bismuth triiodide made the ice crystals shrink, so cirrus clouds lasted longer. "If you get the concentrations wrong, you could get the opposite of what you want," says Storelvmo. And, like other schemes for geoengineering, side effects are likely - changes in the jet stream, say.

Different model assumptions give different "safe" amounts of bismuth triiodide, says Tim Lenton of the University of Exeter, UK. "Do we really know the system well enough to be confident of being in the safe zone?" he asks. "You wouldn't want to touch this until you knew."

Mitchell says seeding would take 140 tonnes of bismuth triiodide every year, which by itself would cost $19 million.

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SPP's Chiam See Tong congratulates MP-elect Lee Li Lian

SINGAPORE: The secretary-general of the Singapore People's Party, Mr Chiam See Tong, has congratulated MP-elect Ms Lee Li Lian and the Workers' Party for their decisive win in the Punggol East by-election.

Mr Chiam said the wide margin of victory shows that Singaporeans increasingly want more democracy and more opposition members in Parliament.

He said, together with the Workers' Party, the Singapore People's Party will work hard in Parliament to scrutinise the government's population White Paper and the 2013 Budget.

The Singapore People's Party will also speak up for Singaporeans and make sure no Singaporean is left behind.

- CNA/ck

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Oppo BDP-105: Not your average Blu-ray player

The Oppo BDP-105 Blu-ray, SACD, and DVD-Audio player

(Credit:
Oppo)

Even by Oppo's high standards the BDP-105 is an extraordinary Blu-ray player. Sure, it's loaded with up-to-the-second features -- 4K upscaling, 2D-to-3D conversion, and a high-quality USB 2.0 digital-to-analog converter -- but what really makes the Oppo special is the sound. Pop the cover and look inside and you'll see why. Most of the 17-pound component's chassis space is devoted to the audio circuitry. That's nice, but the audio advantages will be completely irrelevant if you connect the BDP-105 to your receiver with a HDMI cable (the digital-to-analog conversion would then be handled in the receiver). The 105 was designed for buyers still using older $1,000 or $2,000 receivers from the days before HDMI connectivity, that would like to hear the Blu-rays' high-resolution DTS Master Audio or Dolby TrueHD soundtracks at their best. Since the audio won't be transmitted over the HDMI cable, you would run audio cables between the 105's seven- or five-channel analog outputs and the AV receiver's analog inputs.

The BDP-105 has 7.1/5.1 analog output jacks

(Credit:
Steve Guttenberg/CNET)

Or you could forgo the receiver entirely and hook up the BDP-105 directly to a five- or seven-channel power amplifier. That approach would produce better sound quality, but would lack the connectivity, flexibility, and convenience of today's better receivers. Still, the BDP-105/power amp combo would sound better and be more powerful than most top-of-the-line receivers. The 105's connectivity options won't match any decent receiver, but its connectivity suite is a lot more extensive than most Blu-ray players. The Oppo has two HDMI inputs, so you can connect external devices such as set-top boxes and network streaming devices, three USB 2.0 ports, coaxial and optical digital inputs for satellite boxes, televisions, video-game consoles, etc., and there's a built-in headphone amplifier. The BDP-105's extensive bass management options are on par with a lot of AV receivers. The player's digital volume control is easy to use.

For my listening tests, I hooked up the BDP-105 ($1,199) with an assortment of self-powered Audioengine and Emotiva monitor speakers, and a Hsu subwoofer. With this setup I didn't need to use an AV receiver or separate power amp, but the Raconteurs' "Live at Montreux" Blu-ray was vivid and very live sounding. The system's freewheeling dynamics were really impressive, and the surround mix on King Crimson's "Red" DVD-A projected a remarkably seamless wrap-around soundstage. Each instrument was precisely focused in a near 360-degree sound environment.

The BDP-105 has full speaker setup and bass management options, just like an AV receiver.

(Credit:
Steve Guttenberg/CNET)

Classical music on SACD was just as impressive, the front three speakers produced a three-dimensional soundstage with lots of depth, and string tone was top notch. Dramatic movies on Blu-ray and DVD sounded great. I plugged headphones into the BDP-105, but the sound wasn't special, Schiit Audio's $99 Magni headphone amp was a lot better.

The $499 Oppo BDP-103 shares most of the BDP-105's features, but lacks the upgraded digital-to-analog converters, so if you're planning on using HDMI to connect the player to your receiver, buy the 103, and save $700. You can use the 103's 7.1 analog outputs with an old high-end receiver lacking HDMI connectivity, but the 103's digital converters are a step down from the ones in the 105.

The BDP-105 is an update of the Oppo BDP-95, and the new one has lots of features the old player lacks, but the two players sound about the same. Oppo still has 95s in stock and sells them for $799.

Oppo sells direct and offers a 30-day money-back guarantee, and the return shipping is free.

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Anonymous Hijacks Federal Website Over Reddit Co-Founder's Suicide

Jan 26, 2013 12:27pm

(AP Photo)

Activists from the hacker collective known as Anonymous assumed control over the homepage of a federal judicial agency this morning.

In a manifesto left on the defaced page, the group demanded reform to the American justice system and what the activists said are threats to the free flow of information.

The lengthy essay largely mirrors previous demands from Anonymous, but this time the group also cited the recent suicide of Reddit co-founder and activist Aaron Swartz as has having “crossed a line” for their organization. Swartz was facing up to 35 years in prison on computer fraud charges.

Prosecutors said he had stolen thousands of digital scientific and academic journal articles from the Massachusetts Institute of Technology with the goal of disseminating them for free.

Read More: Aaron Swartz’ Death Fuels MIT Probe, White House Petition to Oust Prosecutor

Anonymous says Swartz was “killed because he was forced into playing a game he could not win — a twisted and distorted perversion of justice — a game where the only winning move was not to play.”

“There must be a return to proportionality of punishment with respect to actual harm caused,” it reads, also mentioning recent arrests of Anonymous associates by the FBI.

In their statement, the hackers say they targeted the homepage of the Federal Sentencing Commission for “symbolic” reasons.

The group claimed that if their demands were not met they would release a trove of embarrassing internal Justice Department documents to media outlets. Anonymous named the files after Supreme Court justices and provided hyperlinks to them from the defaced page.

As of press time the commission’s site had been taken offline but an earlier attempt by CNN to follow the files’ links yielded dead-ends, mostly offline sites.

The file names use an “.aes256″ suffix, denoting a common encryption protocol. The same system was used to encrypt the Wikileaks Afghan war documents before their release.

SHOWS: Good Morning America World News

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Today on New Scientist: 25 January 2013

Hagfish gulped up in first video of deep-sea seal hunt

Watch the first sighting of a seal's underwater eating habits spotted by a teenager watching a live video feed

World's oldest portrait reveals the ice-age mind

A 26,000-year-old carved ivory head of a woman is not just an archaeological find - a new exhibition in London wants us to see works like this as art

Dung beetles navigate using the Milky Way

Forget the Pole Star: on moonless nights dung beetles use the Milky Way to follow a straight path with their dung ball

Stress's impact can affect future generations' genes

DNA analysis has yielded the first direct evidence that chemical marks which disable genes in response to stress can be passed on to offspring

Uncharted territory: Where digital maps are leading us

The way we use maps is evolving fast, says Kat Austen, and it will change a great deal more than how we navigate

Feedback: Tales of the stony turd industry

Fossilised faeces in Shitlington, confusing railway notices, organic water, and more

Duolingo gives language learning a jump start

First evidence that Duolingo, a new website that helps you learn a language while translating the web, actually works

Dolphins form life raft to help dying friend

A group of dolphins was caught on camera as they worked together to keep a struggling dolphin above water by forming an impromptu raft

Zoologger: Supercool squirrels go into the deep freeze

Hibernating Arctic ground squirrels drop their body temperatures to -4 °C, and shut their circadian clocks off for the winter

Greek economic crisis has cleared the air

The ongoing collapse of Greece's economy has caused a significant fall in air pollution, which can be detected by satellites

Body armour to scale up by mimicking flexible fish

Armour that is designed like the scales of the dragon fish could keep soldiers protected - while still letting them bend

Astrophile: Split personality tarnishes pulsars' rep

Pulsars were seen as cosmic timekeepers, but the quirky way in which one example shines suggests we can't take their behaviour for granted

Shrinking proton puzzle persists in new measurement

The most precise experiment yet to find the proton's radius confirms that it can appear smaller than our theories predict - is new physics needed?

Tight squeeze forces cells to take their medicine

A short sharp squash in these channels and a cell's membrane pops open - good news when you want to slip a molecule or nanoparticle in there

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Army kills six as Iraq demos call for PM to quit

FALLUJAH: Soldiers fired on an anti-government rally west of Baghdad on Friday, killing six demonstrators, the first deaths in weeks of increasingly angry protests calling for Iraq's premier to quit.

The shootings came as tens of thousands rallied in majority Sunni areas of the country, railing against alleged targeting of their minority community by the Shiite-led authorities, while in a cross-sectarian show of support, Shiite clerics called on the government to heed their demands.

Protesters had been moving to an area in east Fallujah, a predominantly Sunni town about 60 kilometres from Baghdad, but were blocked off by soldiers deployed from Baghdad, police Captain Nasser Awad told AFP. They began throwing bottles of water at the troops, who opened fire.

Six demonstrators were killed, all of them from gunshot wounds, said Khaled Khalaf al-Rawi, a doctor at Fallujah hospital. Rawi said 35 others were wounded, the majority of them as a result of gunfire.

Defence ministry spokesman Major General Mohammed al-Askari said an inquiry had been opened, and pledged that victims would be financially compensated.

Officials in Fallujah earlier said the army had vacated the town and had been ordered to transfer security responsibility to the police.

Mosques in Fallujah used loudspeakers to urge calm, and security forces imposed a curfew across the town.

Prime Minister Nuri al-Maliki called for restraint on the part of security forces in a statement issued by his office, but also blamed protesters for "raising tensions" and insisted the soldiers had been "attacked".

"This is what Al-Qaeda and terrorist groups are seeking to exploit," he said, referring to apparent sectarian tensions.

Similar demonstrations, meanwhile, took place in the nearby city of Ramadi, like Fallujah a mostly Sunni town in the western province of Anbar, as well as the cities of Samarra, Mosul and Baquba, all north of Baghdad.

Rallies also took place in Sunni neighbourhoods of the capital.

The longest-running of the protests, in Ramadi, has cut off a key trade route linking Baghdad to Jordan and Syria for a month.

"The government should respond immediately to the demands of protesters, before we start a revolution and put an end to it (the government)," said Hassan al-Zaidi, a tribal chief who was protesting in Baquba.

Demonstrators in Samarra held banners calling for Prime Minister Nuri al-Maliki to quit, while protesters in Baquba called for the "fall of the regime", and held banners that read, "Iran out, Baghdad always free", referring to Sunni claims that the government is controlled by Shiite neighbour Iran.

Rallies also called for freeing prisoners who demonstrators allege are being wrongfully held, with one banner in Mosul reading, "Enough talk -- break the doors of the prisons".

Shiite clerics, meanwhile, called for the government to heed demonstrators' demands.

"There must be agreement with the demands," Sadr al-Din al-Qubanji, linked to the Supreme Iraqi Islamic Council political bloc, said in his Friday sermon in the holy Shiite city of Najaf, south of Baghdad. "Nobody can say that the government is clean from errors."

If the authorities did not work to address protesters' demands, Qubanji warned, "There is another way, which can collapse the entire political process in Iraq."

The protests have hardened opposition against Maliki and come amid a political crisis less than three months ahead of key provincial elections.

Demonstrators began by criticising the alleged exploitation of anti-terror laws to detain Sunnis wrongfully, but have since moved on to calling for the premier to quit.

The government has sought to curb the rallies by claiming to have released nearly 900 prisoners in recent weeks, with a senior minister publicly apologising for holding detainees without charge.

- AFP/jc

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Public school system's e-mail sends parents to sex site

The botched link in the e-mail led to this page. Rather elegant.

(Credit:
Screenshot by Chris Matyszczyk/CNET)

School officials don't always do their homework.

Errors creep in -- sometimes creepy ones.

Still, who cannot feel a pang of guffaw-suppressing empathy for whomever wrote an e-mail on behalf of the Chicago Public Schools system?

As CBS Chicago sniggers it, parents were being notified by the Schools system of adjustments to the Illinois Standards Achievement Test.

Helpfully, the e-mail notification included a link to the Illinois State Board of Education Web site.

More Technically Incorrect

Perhaps, though, there was a copy-paste failure. Or perhaps the author decided to type out the whole link. Or perhaps... well, anyway.

Somehow, an extra letter was added to the link, which led to something less than a happy ending.

For this link directed parents to a site -- Isbel.com -- where a group "works together to explore and enrich the modern woman's sex life and sensuality."

I am fairly sure that the Chicago Public Schools system wasn't suggesting that certain mothers of the kids needed to expand their sexual horizons.

I am also fairly sure that this site featured an image of the Kama Sutra -- which is not on the school syllabus.

The Schools system apologized and sent out an amended e-mail.

I wonder how many new enthusiasts Isbel.com secured before the amended e-mail went out.

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5 Amazing Animal Navigators

A house cat named Holly, which made news this week for trekking nearly 200 miles (320 kilometers) back to her hometown, isn't the only supernavigator in the animal kingdom.

"Any animal that comes back to the right place after a long travel, or comes back to the same place again and again following a major movement, is amazing," said Martin Wikelski, a migration expert at the Max Planck Institute. (Read about great animal migrations in National Geographic magazine.)

Many animals have a built-in magnetic system, "like a regular compass," said Wikelski, who is also a National Geographic emerging explorer. (National Geographic News is part of the National Geographic Society.)

However, much is still unknown about how animals navigate—for instance, no one can explain Holly's incredible journey, the New York Times reported.

But more and more research is pointing to the role of smell in navigation, Wikelski noted.

"It's one of the most important mechanisms to tell you where you are and lead you home."

Wikelski told us about five impressive navigators that he believes push the limits of what's possible.

1. Eels. These long, bony fish make epic, mysterious treks across entire oceans. The European eel, for example, is born in European rivers but travels all the way to the Sargasso Sea (map), a distance of thousands of miles, to spawn. The baby eels then return to European rivers and, once it's time for them to spawn, follow their parents' path to very same place in the Sargasso Sea. "Nobody really knows how they do it," Wikelski said.

2. Bar-Tailed Godwit. This shorebird can fly in one go from its Alaska breeding grounds across the entire globe to New Zealand. In 2007, a female bar-tailed godwit got a feather in its cap for the longest nonstop bird migration ever measured—7,145 miles (11,500 kilometers) from Alaska to New Zealand. The bird completed the journey in just nine days, according to biologists who tracked the flight using satellite tags.

3. Blackpoll Warbler. This North American forest dweller has figured out an express way of getting to its winter refuge in Venezuela, Wikelski said. The bird fattens itself up before snagging a ride on a trade wind, sailing from the northeastern U.S. to South America in a hundred hours—entirely over the open ocean. "That's completely crazy," he said. On the way back home, the bird takes the more scenic route, stopping on land to rest and refuel.

4. Mexican Free-Tailed Bat. These flying mammals are common in Texas, where they form colonies in the millions. Wikelski, who was involved in a tracking study of the bats, discovered that they can fly up to 40 miles (70 kilometers) from their home caves in search of moths or mosquitoes. "At some point they turn around and … basically know how to find [their way] back," Wikelski said. Evidence suggests the animals use both landmarks and the smell of their fellow cave bats to point them home. (See bat videos.)

5. Sahara Desert Ant. These insects travel relatively long distances—up to 0.3 mile (0.5 kilometer)—from their central nest sites to search for food. Even though the ants run chaotically in many directions, they remember exactly how far they've gone by counting their steps, as well as navigating via polarized light patterns from the sun, Wikelski said. Finding their way back home is critical for these desert denizens—if they stay outside too long, they'll get fried in the sun.

These are just a sampling of incredible animals on the move. What other animal navigators have you observed? Tell us your stories in comments and we'll showcase the best ones.

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Mars Rover Celebrates Milestone on Red Planet

It was never supposed to last this long. When the Mars rover Opportunity settled on the Martian surface nine years ago today, mission managers at NASA said they would be pleased if it lasted for 90 days.

Instead, it's been 3,201 days, and still counting. The rover has driven 22.03 miles, mostly at a snail's pace, from one crater to another, stopping for months at a time in the frigid Martian winters. The six motorized wheels, rated to turn 2.5 million times, have lasted 70 million, and are all still working.

"Opportunity is still in very good health, especially considering what it's gone through," said John Callas, manager of NASA's Mars Exploration Rover project. The surface of Mars is a pretty tough place; there can be temperature fluctuations of a hundred degrees each day. That's pretty hard on the hardware."

Video: '7 Minutes of Terror: A Landing on Mars

When Opportunity and its twin rover, Spirit, reached Mars in January 2004, there was a fair bit of sniping that NASA, with all that 90-day talk, was playing down expectations. It escalated when Steve Squyres of Cornell University, the principal investigator for the missions, said things like, "We're on Sol 300 of a 90-Sol mission." (A Sol is a day on Mars, and lasts 24 hours, 39 minutes.) Callas and others have insisted that the prediction was based on engineering, not a nod to public relations.

"There was an expectation that airfall dust would accumulate on the rover, so that its solar panels would be able to gather less electricity," said Callas. "We saw that on Pathfinder," a small rover that landed on Mars in 1997." The cold climate was also expected to be hard on the rovers' batteries, and changes in temperature from night to day would probably pop a circuit or two.

Instead, the temperatures weren't quite as tough as engineers had expected, and the rovers proved tougher. They did become filthy as the red Martian dust settled on them, reducing the sunlight on the solar panels -- but every now and then a healthy gust came along, surprising everyone on Earth by cleaning the ships off.

Click Here for Pictures: Postcards From Mars

Spirit, in hilly territory on the other side of the planet, finally got stuck in crusty soil in 2009, and its radio went silent the next year. But Opportunity, though it's had some close calls, is -- well, you remember those commercials about the Energizer bunny.

So what do you do with an aging rover on a faraway planet? You keep using it. In its first weeks, NASA said Opportunity found chemical proof that there had once been standing water on the surface of Mars -- good news if you're looking for signs that the planet could once have been friendly to life. Since then, it's been sent to other places, with rocks and soil that are probably older, and with clay that may have been left by ancient rivers.

About 20 NASA staff members still work full-time on Opportunity at the Jet Propulsion Laboratory in Pasadena, Calif. Another 60 split their time between Opportunity and other projects, such as the Curiosity rover that landed last August. About 100 scientists, doing research on Mars, pop in and out.

In a few months, Callas said, Opportunity will head to an area nicknamed Cape Tribulation. The clay there could be rich in the minerals suggestive of past life.

They haven't done much to mark the ninth anniversary or the 3,200th Martian day, just a get-together earlier this week during a previously scheduled science conference. After that, Callas said, it was back to work.

"It's like keeping your car going," he said, "without ever having a chance to change the oil."

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Keppel Corp's net profit falls 22% on-year in Q4

SINGAPORE: Falling margins from building oil rigs has hit the bottomline of Keppel Corp.

Net profit for the world's leading rig builder fell 22 per cent on-year to S$305 million in the fourth quarter last year.

Still, full year profit for the conglomerate came in 15 per cent to S$2.24 billion.

Despite lower net profit in the three months ended Dec 31, Keppel Corp still declared a final dividend of 27 cents per share.

As part of its 45th anniversary, Keppel Corp is handing out more goodies to its shareholders.

The company has proposed to distribute one Keppel REIT unit for every five Keppel Corp shares.

That is about 27.4 cents per share based on Keppel REIT's closing price of S$1.37 on Thursday.

Together with the interim dividend of 18 cents, total distribution for 2012 will be 72.4 cents per share.

Keppel Corp said the lower net profit was partly due to lower contributions from its offshore and marine unit.

Offshore and Marine's contribution was 12 per cent lower from a higher base in 2011 when margins were at record highs. It contributes to half of Keppel Corp's net profits.

"Keen rivalry from Chinese and Korean yards have suppressed prices and squeezed margins on newbuilds," said Choo Chiau Beng, chief executive officer at Keppel Corp. "In 2013, we will be completing a record of 22 newbuild units."

Analysts remained upbeat of Keppel's prospects going forward.

They say their financial results still outperformed market expectations.

Keppel Corp expects crude oil prices to stay above US$100 per barrel, supporting the need for more global exploration and production.

But global challenges like the slower US economy and the eurozone crisis from last year will continue to pose uncertainties for Keppel Corp's business.

Keppel Corp's property arm, led by the listed Keppel Land, boosted the group's earnings.

Net profit for the property division was 2.5 times higher than in 2011, offsetting the lower earnings from business in the offshore and marine, and infrastructure.

But Keppel Corp does not expect its property arm to perform better this year.

This is because recognition from sales of completed units at its development Reflections at Keppel Bay is expected to be lower this financial year.

- CNA/xq

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French court tells Twitter it must hand over names of racist tweeters

A French court ruled today that Twitter must turn over the identities users who post racist tweets.

(Credit:
Illustration by James Martin/CNET)

Twitter must hand over the identities of users in France who post racist tweets, a French court ruled today.

According to AFP, the court's ruling stemmed from a test case "that pitted the right to free speech against laws banning hate speech," and answered a petition made in October by the French Union of Jewish Students (UEJF), which had claimed that many anti-Semitic tweets had violated the law in the European country.

The UEJF had demanded that Twitter do a better job of policing obviously anti-Semitic tweets.

Twitter said today in a statement that "we are currently reviewing the court's decision."

In October, Twitter was awash in anti-Semitic French-language tweets tied to the hashtag "#unbonjuif" ("a good Jew"), prompting many to argue that social media in general, and Twitter in particular, are cesspools of objectionable content (article in French). A big element of the complaints aimed at Twitter was that it was too hard for users to report objectionable tweets.

At the time, Twitter rebutted that contention, pointing out that a simple Google search for, say, "Report Twitter behavior" returns a number of different methods for reporting, or flagging, abusive posts or users.

Twitter also said in October that it is concerned about egregious user behavior and can, and sometimes does, take action against perpetrators of such activity. The company said, for example, that it can police trending topics, proactively removing any such terms that are considered offensive from its highly influential real-time list of popular subjects, such as "swastika." Today, AFP reported that Twitter had deleted some of the anti-Semitic tweets in October.

But Twitter has also long emphasized freedom of user expression, and the company said in October that on its own, there's nothing about a term like "good Jew" that's inherently anti-semitic. In a case like the one in France, it's up to users to report abusive tweets, the company has contended, and it reserves the right not to take action unless such posts are clearly illegal in the country where the tweet was reported.

It is almost certainly that position that led the UEJF to take its case to the French courts.

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Deformed Dolphin Accepted Into New Family

In 2011, behavioral ecologists Alexander Wilson and Jens Krause of the Leibniz-Institute of Freshwater Ecology and Inland Fisheries in Germany were surprised to discover that a group of sperm whales (Physeter macrocephalus)—animals not usually known for forging bonds with other species—had taken in an adult bottlenose dolphin (Tursiops truncatus).

The researchers observed the group in the ocean surrounding the Azores (map)—about 1,000 miles (1,600 kilometers) off the coast of Lisbon, Portugal—for eight days as the dolphin traveled, foraged, and played with both the adult whales and their calves. When the dolphin rubbed its body against the whales, they would sometimes return the gesture.

Among terrestrial animals, cross-species interactions are not uncommon. These mostly temporary alliances are forged for foraging benefits and protection against predators, said Wilson.

They could also be satisfying a desire for the company of other animals, added marine biologist John Francis, vice president for research, conservation, and exploration at the National Geographic Society (the Society owns National Geographic news).

Photographs of dogs nursing tiger cubs, stories of a signing gorilla adopting a pet cat, and videos of a leopard caring for a baby baboon have long circulated the web and caught national attention.

A Rare Alliance

And although dolphins are known for being sociable animals, Wilson called the alliance between sperm whale and bottlenose dolphin rare, as it has never, to his knowledge, been witnessed before.

This association may have started with something called bow riding, a common behavior among dolphins during which they ride the pressure waves generated by the bow of a ship or, in this case, whales, suggested Francis.

"Hanging around slower creatures to catch a ride might have been the first advantage [of such behavior]," he said, adding that this may have also started out as simply a playful encounter.

Wilson suggested that the dolphin's peculiar spinal shape made it more likely to initiate an interaction with the large and slow-moving whales. "Perhaps it could not keep up with or was picked on by other members of its dolphin group," he said in an email.

Default

But the "million-dollar question," as Wilson puts it, is why the whales accepted the lone dolphin. Among several theories presented in an upcoming paper in Aquatic Mammals describing the scientists' observations, they propose that the dolphin may have been regarded as nonthreatening and that it was accepted by default because of the way adult sperm whales "babysit" their calves.

Sperm whales alternate their dives between group members, always leaving one adult near the surface to watch the juveniles. "What is likely is that the presence of the calves—which cannot dive very deep or for very long—allowed the dolphin to maintain contact with the group," Wilson said.

Wilson doesn't believe the dolphin approached the sperm whales for help in protecting itself from predators, since there aren't many dolphin predators in the waters surrounding the Azores.

But Francis was not so quick to discount the idea. "I don't buy that there is no predator in the lifelong experience of the whales and dolphins frequenting the Azores," he said.

He suggested that it could be just as possible that the sperm whales accepted the dolphin for added protection against their own predators, like the killer whale (Orcinus orca), while traveling. "They see killer whales off the Azores, and while they may not be around regularly, it does not take a lot of encounters to make [other] whales defensive," he said.

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Exterminator Charged in Pa. Doctor's Murder

An exterminator named Joseph Smith was arrested and charged today in the strangling and burning death of Philadelphia pediatrician Melissa Ketunuti.

Smith, 36, had been sent to Ketunuti's home on a service call where the two got into "some kind of argument" in Ketunuti's basement on Monday, Capt. James Clark of the Philadelphia police department said this morning.

"At her home they got into an argument. It went terribly wrong. He struck her, and knocked her to the ground," Clark said. "Immediately he jumped on top of her, started strangling her. She passed out, and then he set her body on fire."

Clark said Smith burned the woman's body "to hide evidence like DNA." He said "at some point, he bound her up." The doctor was found with her hands and feet tied behind her back.

The captain said that before today's arrest Smith's record consisted of only "minor traffic offenses."

Philadelphia Police Department/AP Photo

Pa. Doctor Killing: Person of Interest in Custody Watch Video

Philadelphia Doctor's Murder Leaves Police Baffled Watch Video

Police received a call from Ketunuti's dog-walker about the house fire around 12:30 p.m. Monday, and once inside found Ketunuti with her hands and feet bound. They believe Smith hit her and strangled her with a rope, causing her to pass out, and then bound her body and set fire to it in order to destroy evidence, including DNA evidence.

Ketunuti, 35, was fully clothed and police do not believe she was sexually assaulted.

She was a doctor at Children's Hospital of Philadelphia and had lived alone in the Graduate Hospital neighborhood of the city for about three years.

Clark said that homicide detectives scoured the neighborhood for surveillance videos from nearby stores and businesses, and through the video identified the suspect.

Smith was spotted on video getting out of the vehicle and following Ketunuti to her home. The man left her home after an hour and was seen on video circling her home.

Detectives drove to Clark's home in Levittown, Pa., outside of Philadelphia where he lives with a girlfriend and her child, on Wednesday night and brought him back to the Philadelphia police station.

A silver Ford truck was towed from Smith's home, which was the same truck spotted on surveillance video Monday in Ketunuti's neighborhood, sources told ABC News affiliate WPVI.

There, he gave statements that led police to charge him with the murders, Clark said.

Smith will face charges of murder, arson, and abuse of a corpse.

Ketunuti's hospital issued a statement Tuesday that she was "a warm, caring, earnest, bright young woman with her whole future ahead of her," adding that she will be deeply missed.

"[She was] super pleasant, really nice," one neighbor said. "Just super friendly."

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Snaps from space: Bleak landscapes become abstract art

18:27 23 January 2013

Yesterday, Canadian astronaut Chris Hadfield dropped a puck from space for his favourite hockey team's opening game. In the meantime, he's been busy tweeting his latest photos of astounding landscapes from the International Space Station. Here are a few of our favourites. Sandrine Ceurstemont

Image 1 of 6

The Australian outback looks like an abstract painting in this view, its iron-rich soil appearing even more vivid from far above. Ridges in its flat topography resemble brushstrokes.

(Image: Chris Hadfield/Canadian Space Agency/ISS)

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Steady rise in government data requests: Google

SAN FRANCISCO: Google on Wednesday reported a "steady increase" in government requests to hand over data from Internet users in the second half of 2012.

The Web giant's semi-annual "transparency report" showed the most requests came from the United States, with 8,438 requests for information about 14,868 users.

India was second with 2,431 requests for data about 4,106 users, followed by France, where Google received 1,693 requests for information about 2,063 users. Germany, Britain and Brazil rounded out the top six, Google said.

"The steady increase in government requests for our users' data continued in the second half of 2012, as usage of our services continued to grow," said Richard Salgado, Google's head of law enforcement and information security.

"User data requests of all kinds have increased by more than 70 per cent since 2009," he said in a blog posting.

"In total, we received 21,389 requests for information about 33,634 users from July through December 2012."

Google said it supplied at least some of the requested data in 68 per cent of cases, down from 76 per cent in late 2010.

In releasing details of requests in the United States, Google said 68 per cent of the requests it received from government entities were through subpoenas, which "are the easiest to get because they typically don't involve judges," according to Salgado.

Another 22 per cent were through search warrants, mostly issued by judges when there is "probable cause" related to a crime.

Google provided at least some data in 90 per cent of the requests in the United States in late 2012, compared with 94 per cent two years earlier.

Berin Szoka of the Washington think tank TechFreedom said the report shows "a disturbing growth in government surveillance online."

"On its own, the growth in number of requests for private information like emails should be alarming, especially after the Petraeus case," he said, referring to the disclosure of email exchanges that led to the resignation of CIA director David Petraeus.

"Even more disturbing is that most requests have not been reviewed by a court to ensure that law enforcement has established probable cause to believe a crime has actually been committed, as the (constitution's) Fourth Amendment generally requires."

- AFP/jc

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Tech talk 'more confusing than a foreign language'

The most confusing word in tech. Allegedly.

(Credit:
Screenshot by Chris Matyszczyk/CNET)

You might be familiar with the term "megabyte."

For some, though, it represents an emotional megadeath.

You might know what an ISP is, but some need ESP in order to explain to themselves what this actually means.

This, at least, is the conclusion of a deeply disturbing piece of research, performed in the U.K. on behalf of Carphone Warehouse's Geek Squad.

More Technically Incorrect

As the Daily Mail translates it, real, normal human beings are more emotionally disturbed when faced with tech talk than with the Greek for "good night" or the Russian for "cheers."

It seems they begin to perspire. The electrics in their brain begin to overload. The researchers calculated that these people found it 42 percent more stressful and confusing to decipher geek than Greek.

I can sense a little kvetching and stirring in the audience, so please let me make it worse for you.

This piece of research claims that when they heard terms such as "OS" and "plug-in," the men were 138 percent more stressed than the women.

It is customary here to accept all research with at least as much salt as McDonald's puts on its fries.

So might I temper your temper by explaining that there were a mere 16 respondents in this fine scientific study.

However, Carphone Warehouse's Geek Squad has decided that the 10 most confusing tech terms from the research just have to go. The company is simply removing them from its dialogue with customers.

Here they are:

1. Algorithm


2. Beta


3. Cache


4. Phablet


5. Vlogging


6. Phishing


7. ISP


8. Trojan


9. Geo-tagging


10. Back-end

Some might be surprised that "back-end" was so low down.

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Pictures: Trout vs. Trout in Yellowstone Lake

Photograph by Jay Fleming

Without aggressive management, the population of Yellowstone cutthroats could be decimated. To suppress the population of lake trout, the National Park Service engaged a contract fishing company to net them. Cutthroats are removed carefully from the traps and thrown back. Lake trout are removed and killed. Last year about 300,000 of the non-native intruders were taken from the lake.

Published January 22, 2013

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Clinton Says Budget Cuts Undermine Security

An energized Secretary of State Hillary Clinton stood her ground today, telling the Senate Foreign Relations Committee that she has overseen plans to secure diplomatic outposts around the world while cuts in State Department funding undermine those efforts.

Citing a report by the department's Accountability Review Board on the security failures that led to the deaths of four Americans in Benghazi, Libya, during an attack last year, Clinton said the board is pushing for an increase in funding to facilities of more than $2 billion per year.

"Consistent shortfalls have required the department to prioritize available funding out of security accounts," Clinton told the Senate this morning, while again taking responsibility for the Benghazi attack. "And I will be the first to say that the prioritization process was at times imperfect, but as the ARB said, the funds provided were inadequate. So we need to work together to overcome that."

Clinton, showing little effect from her recent illnesses, choked up earlier in discussing the Benghazi attack.

"I stood next to President Obama as the Marines carried those flag-draped caskets off the plane at Andrews," Clinton said this morning, her voice growing hoarse with emotion. "I put my arms around the mothers and fathers, sisters and brothers, sons and daughters."

The outgoing secretary of state was the only witness to giving long-awaited testimony before the Foreign Relations Committee this morning, and will appear before the House Foreign Affairs Committee at 2 p.m.

Pablo Martinez Monsivais/AP Photo

Hillary Clinton's Fiery Moment at Benghazi Hearing Watch Video

Hillary Clinton to Testify on Benghazi Consulate Attack Watch Video

Hillary Clinton Suffers Concussion After Fainting Watch Video

The secretary, who postponed her testimony in December, started today by giving context to the terrorist attack.

"Any clear-eyed examination of this matter must begin with this sobering fact," Clinton began. "Since 1988, there have been 19 Accountability Review Boards investigating attacks on American diplomats and their facilities."

But the secretary did not deny her role in the failures, saying that as secretary of state, she has "no higher priority and no greater responsibility" than protecting American diplomats abroad like those killed in Benghazi.

"As I have said many times, I take responsibility, and nobody is more committed to getting this right," Clinton said. "I am determined to leave the State Department and our country safer, stronger and more secure."

Among the steps Clinton has taken, she said, is to "elevate the discussion and the decision-making to make sure there's not any" suggestions that get missed, as there were in this case.

Clinton testified that the United States needs to be able to "chew gum and walk at the same time," working to shore up its fiscal situation while also strengthening security, and she refuted the idea that across-the-board cuts slated to take place in March, commonly referred to as sequestration, were the way to do that.

"Now sequestration will be very damaging to the State Department and USAID if it does come to pass, because it throws the baby out with the bath," Clinton said, referring to the United States Agency for International Development, which administers civilian foreign aid.

While the State Department does need to make cuts in certain areas, "there are also a lot of very essential programs … that we can't afford to cut more of," she added.

More than four months have passed since the attack killed U.S. Ambassador Christopher Stevens and three other Americans in Libya. These meetings, during which Clinton discussed the report on State Department security failures by the Accountability Review Board, were postponed because of her recent illness.

Clinton told the Senate that the State Department is on track to have 85 percent of action items based on the recommendations in the Accountability Review Board report accomplished by March, with some already implemented.

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Today on New Scientist: 22 January 2013

Did Mars hide life in its watery pockets?

Clays and carbonates found in a Martian crater might be deposits from groundwater that could have nourished life long after the planet's surface dried up

8th-century tree rings hint at close-range space blast

High levels of carbon-14 in two Japanese cedars may be one of the first signs of a nearby gamma-ray burst

3D sonar uncovers skeleton of Civil War battleship

One hundred and fifty years after it went down in battle, the bones of the paddle-wheel steamship USS Hatteras have been scanned on the seabed

Barack Obama promises US action on climate

A bold strategy to combat global warming and the aim to lead the world in clean technology are at the centre of the US president's plans

Threatwatch: The greatest risks to world stability

Some 3000 top corporate and political bosses are meeting at the World Economic Forum in Davos to hear about the threats we all face

Robot-assisted 3D printer aids march of the machines

An all-in-one robotic fabricator can mill, drill and assemble the pieces created by a 3D printer

Sacrificing Einstein: Relativity's keystone has to go

Our hopes of finding a theory of everything depend on upsetting a balance that Einstein cherished, says Stuart Clark

Global mercury treaty will take decades to work

140 countries have agreed a deal to cut mercury pollution, but it will be a long slow process getting the toxic metal out of the environment

Could botox change your life for the better?

In The Face of Emotion, Eric Finzi explores how one of the world's most popular cosmetic procedures could alleviate depression

A theory of everything won't provide all the answers

We shouldn't be obsessed with finding a theory of everything, says Lisa Randall, one of the world's most prominent theoretical physicists

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SGX's Q2 net profit rises 17% to S$76m

SINGAPORE : Rising interest in derivatives trading helped lift earnings for the Singapore Exchange (SGX) last quarter.

Asia's second-largest bourse operator reported a 17 per cent on-year rise in second-quarter net profit to S$76 million.

It also attracted a large number of new bond listings in the same quarter.

Derivatives trading has been the star performer in SGX.

Over the October to December quarter, derivatives daily average volume on SGX hit a record of 358,532 contracts, up 30 per cent on-year.

This was supported by rising trading interests in China A50 futures and Japan Nikkei 225 options.

Not to be undone, the securities market performed well too.

Its daily average volume rose 8 per cent for the quarter to hit a trading value of S$1.2 billion.

This translates to a revenue of S$58 million for the securities business segment.

SGX said the better performance was due to improvements in investor sentiment following stability over the Europe debt situation and improved US economy.

Magnus Bocker, chief executive officer of Singapore Exchange, said: "We should remember the enormous amount of liquidity in the market. Not so much in the equity market, but actually more in the fixed income and currency markets, and with chasing yields and lot of very successful and growing companies, I think we can all expect this sentiment to continue. I think we can expect more flows into securities."

Some analysts are bullish on SGX's prospects going forward.

The said the improved investment climate globally may benefit the exchange operator.

Ken Ang, investment analyst at Phillip Securities Research, said: "SGX is very well placed to benefit from this increasing attractiveness of the equity market and therefore resulting in increase in trading value."

SGX attracted eight new listings in its second quarter - raising S$798.9 million.

While the number seems small, it came amid declines in the global initial public offering (IPO) market.

In 2012, global IPO volumes fell 27 per cent, with the lowest level of funds raised since 2009.

Kenneth Ng, head of Singapore research at CIMB Research, said: "I think while that (derivative) is great and that diversified the revenue of SGX, SGX still has a rather pertinent problem of trying to increase the security turnover velocity and value by retail initiatives, attracting listings and so forth."

Apart from seeking more IPOs, SGX also attracted some 90 new bond listings, raising S$39.7 billion for the quarter.

- CNA/ms

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Giottos: Honey, I shrunk the tripod

Good news for shutterbug travelers with limited luggage space: Popular tripod maker Giottos has just released a new range of "YTL" tripods that utilize a new Y-shaped center column design that's 30 percent smaller than the cylindrical columns found in typical tripods. This allows the tripod legs to be tucked into the center column closer, making the tripod more compact and allowing it to be easily stowed.

While the center column sees a reduction in size, the company claims the new design does not compromise the tripod's stability and strength. The new tripod range can support cameras from 11 pounds to 22 pounds.

The "YTL" range will come in three- or four-section variants and feature a two- or three-way center column. Prices will range from $160 to $350 depending on whether you choose the aluminum or the lighter carbon fiber version. Giottos tripods are available from select online stores in the U.K.

(Source: Crave Asia via DPreview)

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Newly Discovered Nebula Looks Like a Manatee

It's a bird, it's a plane, it's ... a manatee? The National Radio Astronomy Observatory (NRAO) believes that a gas cloud in the constellation Aquila bears an uncanny resemblance to the endangered aquatic mammal.

Heidi Winter, executive assistant to NRAO's director, first noticed the similarity. And Tania Burchell, an NRAO media producer who used to work in manatee conservation, quickly saw it as "a wonderful opportunity to bridge two worlds—biology and astronomy."

The cloud, or nebula, which is named W50, has more in common with manatees than just its shape. It is the remnant of a star explosion from 20,000 years ago. Particle beams that shoot from the explosion's center, where a star and a black hole orbit each other, form a spiral pattern resembling scars.

Manatees also bear scars. "Around 80 percent of manatees in Florida have visible scarring," said Michael Lusk, manager of Crystal River National Wildlife Refuge. Because manatees prefer shallow water, collisions with boat propellers are frequent.

The resemblance continues. Like the "sea cow," which can blend into murky water, the nebula is hard to spot. It's approximately 18,000 light-years away, so only one bright arc can be seen by the human eye. Astronomers first saw the ghostly nebula with a telescope that collects a kind of light that radiates at longer wavelengths called radio waves.

W50's new nickname, the Manatee Nebula, and its first photos were unveiled January 19 at the Florida Manatee Festival. "People have an underlying love for the natural world—sky or sea," said Burchell. "We're human beings on this planet, looking up or looking down."

The event marks the 40th anniversary of the Endangered Species Act, which aims to protect critical habitats. Florida's manatee population has risen from around 700 in the 1970s to 5,000 today, and the U.S. Fish and Wildlife Service is considering reclassifying the species from endangered to threatened.

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Teen Planned Walmart Attack After Killing Family

The New Mexico teenager who used an assault rifle to kill his mother, father and younger siblings told police he hoped to shoot up a Walmart after the family rampage and cause "mass destruction."

Police said they are also considering charging the shooter's 12-year-old girlfriend.

According to new information released by police today, Nehemiah Griego, the 15-year-old son of an Albuquerque pastor, had plans to kill his family, his girlfriend's family, and local Walmart shoppers for weeks before he acted on the impulse on Sunday.

The shooting spree began shortly around 1 a.m. on Sunday, when Griego snuck into his parents' bedroom while his mother, Sara Griego, was asleep. There he raided the closet where the family kept their guns, and immediately used a .22 rifle to kill her, according to the Bernalillo County Sheriff's Department.

Griego then shot three of his younger siblings in the home, including a 9-year-old, 5-year-old, and 2-year-old, and waited for his father to come from his overnight shift working at a nearby rescue mission. When his father, Greg Griego, walked into the home around 5 a.m., unaware of what had taken place, Griego shot him multiple times with the AR-15 rifle, Sheriff Dan Houston said today.

Greg Griego was a former church pastor at Calvary Church in Albuquerque, and worked as a chaplain at a local jail where he counseled convicts. The family was very involved in the church, according to its website.

Susan Montoya Bryan/AP Photo

15-Year-Old Son Suspected in Family Shooting Watch Video

Sikh Temple Shooting: Gunman Killed, 6 Others Dead Watch Video

Griego then packed up the guns, including two shotguns, as well as ammunition for the rifles, and planned to drive to a Walmart to shoot additional people.

Houston said today that Griego called his 12-year-old girlfriend Sunday and ended up spending the entire day with her rather than going to the Walmart. Around 8 p.m. on Sunday, the pair drove to Calvary Church and someone on the church's staff then called 911, Houston said.

"At this time, Nehemiah had been contemplating this for some time. The information that Nehemiah had contemplated going to the local Walmart and participating in a shooting in there is accurate," Houston said. "There is no information at all that he went to church to cause anyone bodily harm there. The suspect also contemplated killing his girlfriend's parents."

The girlfriend's name was not released, but police are investigating whether to press any charges against her, Houston said.

Sheriff's deputies were dispatched to the Griego home around 9:15 p.m. on Sunday and arrived 10 minutes later, where they found the four bodies.

Griego quickly confessed to the crime, telling investigators he was "frustrated" with his mother. Deputies said he was "unemotional" and "very stern" during the confession.

"The motive was purely that he was frustrated with his mother. He could not articulate to our investigators any farther," Houston said. "In the time our investigators spent with him, it was a very casual (statement), he was just frustrated with how things were, and would not even articulate any further details of that frustration."

"It's horrific," Houston added.

Griego reportedly gushed to police about his love for violent video games during the interrogation, Houston said. He told police he loved to play Modern Warfare and Grand Theft Auto.

The suspect was involved heavily in games, violent games, it's what he was into," Houston said. "He was quite excited as he discussed this with our investigators."

Houston said that Griego had occasionally lost touch with his family and then reconnected with them multiple times in his life. He told investigators that his father had taught him how to shoot the weapons and the pair had practiced shooting them together.

Griego has five older siblings who were not living at the home at the time of the shooting and were unharmed.

He is facing murder and child abuse charges and will be tried as an adult, according to police.

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Today at New Scientist: 21 January 2013

Twitter reveals how Higgs gossip reached fever pitch

Anyone who fondly remembers the heady days of excitement preceding the Higgs boson announcement last year can now relive the experience

Vibrating navigator shows cyclists the way

A buzzing GPS-fuelled belt that tells cyclists when to turn might help them keep their eyes on the road and save lives

Call off the pregnancy police - women want the truth

Pregnant women can do without being made to feel guilty and burdened by wrong or contradictory advice. Just give them the facts, says Linda Geddes

Supernova-powered bow shock creates cosmic spectacle

The infrared vision of NASA's Spitzer Space Telescope shows how a massive speeding star is electrifying its surroundings

First video of squid sex reveals deep-sea Kama Sutra

Watch a pair of squid caught in the act for the first time in an unexpected sexual position

Let's be clear on health risks from radiation

Should Californians have had iodine after Fukushima? In Radiation Robert Peter Gale and Eric Lax clear up the confusion over radiation and health

Wind power delivers too much to ignore

Although aesthetic concerns need to be heard, qualms about wind's reliability are wide of the mark, argues an energy policy researcher

Quadruple DNA helix discovered in human cells

The classic double helix has been joined by a four-stranded version that may play a role in cancer

Turn up the bass to scare birds away from planes

Subwoofers that blast out sounds too low to be heard by humans can keep birds out of busy air space, and prevent them colliding with planes

Earth may be crashing through dark matter walls

If the universe is a patchwork quilt of exotic force fields, we should be able to detect dark matter whenever we cross between patches

Blinded by sun? Let your steering wheel guide you

A steering wheel that buzzes when drivers are dazzled by bright lights and drift from their lane could help curb accidents

NASA planet-hunter is injured and resting

The Kepler space telescope has put its search for alien Earths on hold while it recovers from a stressed reaction wheel

High-tech Dreamliner's wings clipped by battery trouble

Boeing's 787 Dreamliner is replete with cutting-edge technology. But problems with its complex systems now have the planes grounded around the world

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India, Australia to start nuclear energy talks

NEW DELHI: India and Australia plan to begin civil nuclear cooperation talks in March after Canberra agreed last year to open negotiations to export uranium fuel to the energy-hungry South Asian nation.

The two countries will hold the first round of talks in the Indian capital, Indian foreign minister Salman Khurshid said in a statement.

"We shall be commencing negotiations on a Civil Nuclear Energy Cooperation Agreement in March," Khurshid said after discussions with his Australian counterpart, Bob Carr, in the Indian capital.

Australia had earlier refused to sell uranium to India as it has not signed the Nuclear Non-Proliferation Treaty but reversed its stand last October as it sought to improve ties with one of Asia's third biggest economy.

"India is a key part of Australia's future," Carr said.

The two countries have said the formal negotiations could last up to two years.

New Delhi -- backed by the United States -- won a special exemption in 2008 from the Nuclear Suppliers Group (NSG), which governs global nuclear trade, to allow it to buy reactors and fuel from overseas.

India, which has tense relations with its nuclear-armed neighbour Pakistan, had been subject to a global embargo since the 1970s when it first conducted a nuclear weapons test.

New Delhi has sought to forge close ties with a host of countries with deposits of uranium, including Mongolia, Tajikistan and Canada.

India is heavily dependent on coal and produces less than three percent of its energy from its existing atomic plants. The government hopes to raise the figure to 25 percent by 2050.

Although Australia does not use nuclear power itself, it is the world's third-ranking uranium producer and holds an estimated 23 percent of the world's reserves.

-AFP/ac

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Bad parking job? Text the driver through the license plate

Be a good samaritan and warn a car owner.

(Credit:
Screenshot by Amanda Kooser/CNET)

Trying to find parking in San Francisco sometimes feels likes a car-based version of "Survivor." It's not pretty. Cars block driveways, drivers forget to curb their wheels, lights get left on, and meters run out. These are all reasons why you might want to contact a vehicle's owner. If everyone in San Francisco signed up for CurbTXT, then it would be easy to get in touch.

Drivers can sign up for CurbTXT by registering their license plates and phone numbers. A sticker on the
car gives people an anonymous way to contact the driver through text messaging by referencing the plate number. The service forwards the message to the owner.

CurbTXT is a sweet idea. It could turn San Francisco into a wonderland of parking good deeds, helping people avoid fines and giving them the opportunity to move their vehicles before they get towed.

CurbTXT faces an uphill battle as far as adoption. It also opens up the possibility of prank texts like "OMG your car is full of monkeys!!!" To combat that, users can report inappropriate messages and abusers will be blocked.

According to the Evernote blog, dozens of texts have been sent through the service since it launched last fall. That's not much, but CurbTXT founders have chatted with people from the San Francisco board of supervisors about getting city support for the project. Until then, the service is getting users through flyers and word-of-mouth.

(Via Opportunity Notes)

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Attack at Algeria Gas Plant Heralds New Risks for Energy Development

The siege by Islamic militants at a remote Sahara desert natural gas plant in Algeria this week signaled heightened dangers in the region for international oil companies, at a time when they have been expanding operations in Africa as one of the world's last energy frontiers. (See related story: "Pictures: Four New Offshore Drilling Frontiers.")

As BP, Norway's Statoil, Italy's Eni, and other companies evacuated personnel from Algeria, it was not immediately clear how widely the peril would spread in the wake of the hostage-taking at the sprawling In Amenas gas complex near the Libyan border.

Map by National Geographic

Algeria, the fourth-largest crude oil producer on the continent and a major exporter of natural gas and refined fuels, may not have been viewed as the most hospitable climate for foreign energy companies, but that was due to unfavorable financial terms, bureaucracy, and corruption. The energy facilities themselves appeared to be safe, with multiple layers of security provided both by the companies and by government forces, several experts said. (See related photos: "Oil States: Are They Stable? Why It Matters.")

"It is particularly striking not only because it hasn't happened before, but because it happened in Algeria, one of the stronger states in the region," says Hanan Amin-Salem, a senior manager at the industry consulting firm PFC Energy, who specializes in country risk. She noted that in the long civil war that gripped the country throughout the 1990s, there had never been an attack on Algeria's energy complex. But now, hazard has spread from weak surrounding states, as the assault on In Amenas was carried out in an apparent retaliation for a move by French forces against the Islamists who had taken over Timbuktu and other towns in neighboring Mali. (See related story: "Timbuktu Falls.")

"What you're really seeing is an intensification of the fundamental problem of weak states, and empowerment of heavily armed groups that are really well motivated and want to pursue a set of aims," said Amin-Salem. In PFC Energy's view, she says, risk has increased in Mauritania, Chad, and Niger—indeed, throughout Sahel, the belt that bisects North Africa, separating the Sahara in the north from the tropical forests further south.

On Thursday, the London-based corporate consulting firm Exclusive Analysis, which was recently acquired by the global consultancy IHS, sent an alert to clients warning that oil and gas facilities near the Libyan and Mauritanian borders and in Mauritania's Hodh Ech Chargui province were at "high risk" of attack by jihadis.

"A Hot Place to Drill"

The attack at In Amenas comes at a time of unprecedented growth for the oil industry in Africa. (See related gallery: "Pictures: The Year's Most Overlooked Energy Stories.") Forecasters expect that oil output throughout Africa will double by 2025, says Amy Myers Jaffe, executive director of the energy and sustainability program at the University of California, Davis, who has counted 20 rounds of bidding for new exploration at sites in Africa's six largest oil-producing states.

Oil and natural gas are a large part of the Algerian economy, accounting for 60 percent of government budget revenues, more than a third of GDP and more than 97 percent of its export earnings. But the nation's resources are seen as largely undeveloped, and Algeria has tried to attract new investment. Over the past year, the government has sought to reform the law to boost foreign companies' interests in their investments, although those efforts have foundered.

Technology has been one of the factors driving the opening up of Africa to deeper energy exploration. Offshore and deepwater drilling success in the Gulf of Mexico and Brazil led to prospecting now under way offshore in Ghana, Mozambique, and elsewhere. (See related story: "New Oil—And a Huge Challenge—for Ghana.") Jaffe says the Houston-based company Anadarko Petroleum has sought to transfer its success in "subsalt seismic" exploration technology, surveying reserves hidden beneath the hard salt layer at the bottom of the sea, to the equally challenging seismic exploration beneath the sands of the Sahara in Algeria, where it now has three oil and gas operations.

Africa also is seen as one of the few remaining oil-rich regions of the world where foreign oil companies can obtain production-sharing agreements with governments, contracts that allow them a share of the revenue from the barrels they produce, instead of more limited service contracts for work performed.

"You now have the technology to tap the resources more effectively, and the fiscal terms are going to be more attractive than elsewhere—you put these things together and it's been a hot place to drill," says Jaffe, who doesn't see the energy industry's interest in Africa waning, despite the increased terrorism risk. "What I think will happen in some of these countries is that the companies are going to reveal new securities systems and procedures they have to keep workers safe," she says. "I don't think they will abandon these countries."

This story is part of a special series that explores energy issues. For more, visit The Great Energy Challenge.

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President Obama Calls for 'Collective Action'

Invoking the nation's founding values, President Obama marked the start of his second term today with a sweeping call for "collective action" to confront the economic and social challenges of America's present and future.

"That is our generation's task, to make these words, these rights, these values -- of life, and liberty, and the pursuit of happiness -- real for every American," Obama said in an inaugural address delivered from the west front of the U.S. Capitol.

"Being true to our founding documents does not require us to agree on every contour of life; it does not mean we will all define liberty in exactly the same way, or follow the same precise path to happiness. Progress does not compel us to settle centuries-long debates about the role of government for all time," he said, giving nod to the yawning partisan divide.

"But it does require us to act in our time."

The call to action, on the eve of what's shaping up to be another contentious term with Republicans and Congress, aimed to reset the tone of debate in Washington and turn the page on the political battles of the past.

"For now decisions are upon us, and we cannot afford delay. We cannot mistake absolutism for principle, or substitute spectacle for politics, or treat name-calling as reasoned debate," Obama said. "We must act, knowing that our work will be imperfect."

Pablo Martinez Monsivais/AP Photo

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The address, lasting a little less than 20 minutes, laid out in broad terms Obama's vision for the next four years, alluding to looming policy debates on the war in Afghanistan, deficit reduction, immigration, and overhaul of Social Security and Medicare.

Obama also became the first president, at least in recent inaugural history, to make explicit mention of equality for gay and lesbian Americans. He made repeated mentions of "climate change," something no president has said from such a platform before.

The president stuck closely to his campaign themes, offering few new details of his policy proposals, however. Those are expected to come next month in the State of the Union address Feb. 12.

"A decade of war is now ending. An economic recovery has begun. America's possibilities are limitless, for we possess all the qualities that this world without boundaries demands: youth and drive; diversity and openness; an endless capacity for risk and a gift for reinvention," Obama said, sounding optimistic tones.

"We are made for this moment, and we will seize it," he said, "so long as we seize it together."

Hundreds of thousands packed the National Mall in chilly 40-degree temperatures and brisk wind to hear Obama's remarks and witness the ceremonial swearing-in. While the crowds were smaller than four years ago, the U.S. Park Police said the Mall reached capacity and was closed shortly before Obama took the podium.

Shortly before the address, Obama placed his left hand on the stacked personal Bibles belonging to President Abraham Lincoln and Dr. Martin Luther King Jr., and raised his right to repeat the oath administered by Supreme Court Chief Justice John Roberts.

"I, Barack Hussein Obama, do solemnly swear that I will faithfully execute the office of president of the United States," he said, "and will to the best of my ability, preserve, protect and defend the Constitution of the United States."

Obama and Biden were both officially sworn in during private ceremonies Sunday, Jan. 20, the date mandated by the Constitution for presidents to begin their terms.

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Quadruple DNA helix discovered in human cells

Sixty years after James Watson and Francis Crick established that DNA forms a double helix, a quadruple-stranded DNA helix has turned up.

Quadruple helices that intertwine four, rather than two, DNA strands had been made in the laboratory, but were regarded as curiosities as there was no evidence that they existed in nature. Now, they have been identified in a range of human cancer cells.

The four-stranded packages of DNA, dubbed G-quadruplexes, are formed by the interaction of four guanine bases that together form a square. They appear to be transitory structures, and were most abundant when cells were poised to divide. They appeared in the core of chromosomes and also in telomeres, the caps on the tips of chromosomes that protect them from damage.

Because cancer cells divide so rapidly, and often have defects in their telomeres, the quadruple helix might be a feature unique to cancer cells. If so, any treatments that target them will not harm healthy cells.

"I hope our discovery challenges the dogma that we really understand DNA structure because Watson and Crick solved it in 1953," says Shankar Balasubramanian of the University of Cambridge, UK.

Tagged with antibodies

Balasubramanian's team identified the four-stranded structures in cancer cells with the help of an antibody that attaches exclusively to G-quadruplexes. To stop them from unravelling into the ordinary DNA, they exposed the cells to pyridostatin, a molecule that traps quadruple helices wherever they form.

This enabled the researchers to count how many formed at each stage of cell multiplication. The G-quadruplexes were most abundant in the "S-phase" – when cells replicate their DNA just prior to dividing.

"I expect they will also exist in normal cells, but I predict that there will be differences with cancer cells," says Balasubramanian. His hunch is that the G-quadruplexes are triggered into action by chaotic genomic mutations and reorganisations typical of cancerous or precancerous cells.

"This research further highlights the potential for exploiting these unusual DNA structures to beat cancer, and the next part of this is to figure out how to target them in tumour cells," says Julie Sharp of Cancer Research UK, which funded the research.

Another important question that Balasubramanian's and other teams will try to answer is whether G-quadruplexes play a role in embryo development, and whether such a role is mistakenly reactivated in cancer cells. "We plan to find out whether the quaduplexes are a natural nuisance, or there by design," he says.

Journal reference: Nature Chemistry, DOI: 10.1038/NCHEM.1548

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Football: Dempsey late show gives United frostbite

LONDON: A stoppage-time goal by Clint Dempsey saw Tottenham Hotspur snatch a 1-1 draw at home to Manchester United on Sunday that prevented the Premier League leaders from restoring their seven-point lead.

United had taken the lead through Robin van Persie in the 25th minute and looked set to hold on for a narrow victory until Dempsey scrambled the ball home from close range in injury time at a snow-sprinkled White Hart Lane.

The result means that second-place Manchester City are now five points behind United, while Spurs finish the weekend trailing third-place Chelsea by four points and leading Everton by the same distance.

It was only the fifth time this season that Alex Ferguson's side have failed to take maximum points from a league game and they have taken just a point from Spurs, who prevailed 3-2 at Old Trafford in September.

Persistent snowfall in north London had put the fixture in jeopardy, but the game survived a pitch inspection 70 minutes prior to kick-off and as the game got under way, the snow had started to ease.

Spurs looked to take the initiative, Dempsey seeing a volley blocked by Nemanja Vidic and the recalled Scott Parker shooting over from 22 yards, but United threatened first when van Persie headed straight at Hugo Lloris.

Few players have caused Patrice Evra problems as consistently as Aaron Lennon in recent seasons and the Spurs winger left the Frenchman trailing in the 14th minute before drawing a save from De Gea with a low shot.

United started the game with Wayne Rooney on the bench but there is always danger when van Persie is around and in the 25th minute the Dutchman struck for the 10th time in as many league games to put the visitors ahead.

Danny Welbeck drifted in from the left before spraying the ball wide to England colleague Tom Cleverley, and his curling cross was headed in at the back post by the leaping van Persie.

Spurs resumed their assault on the United goal but both Jermain Defoe and Gareth Bale were thwarted by agile saves from De Gea, who readjusted well to block the Welshman's deflected shot shortly before half-time.

Defoe shot wide early in the second period, before Bale shaped a beautiful effort with the outside of his left foot that drifted over.

De Gea then produced an incredible reaction save with his legs to thwart Dempsey, who was able to take aim at an exposed goal from just eight yards after a slalom into the box by Mousa Dembele.

United manager Ferguson introduced Rooney with half an hour remaining and he immediately had a penalty appeal rejected after being caught by Steven Caulker just inside the Tottenham area.

Spurs resumed their pressure, De Gea saving at his near post from Dempsey, before Welbeck narrowly failed to convert a low cross from Rafael at the other end.

A clear sight of goal arrived for the hosts in the 78th minute, but when Lennon sent Defoe clear, his former West Ham United team-mate Rio Ferdinand slid in from nowhere to prevent an equaliser with a vital block.

Ferdinand then produced a telling intervention with five minutes left, bravely getting his head to a fierce Bale strike to divert the ball narrowly wide of the left-hand post.

It seemed Spurs were destined to leave empty-handed, but with the final whistle beckoning, Dempsey thrashed a loose ball into the bottom-left corner to give United's pursuers a glimmer of hope in the title race.

-AFP/ac

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