Oil down in Asian trade






SINGAPORE: Oil prices were down in Asia on Thursday as the dollar strengthened and amid market speculation that Saudi Arabian crude production could increase in the coming months, analysts said.

New York's main contract, light sweet crude for delivery in April, shed 57 cents to $94.65 a barrel and Brent North Sea crude for delivery in April dropped 61 cents to $114.99.

The retreat in oil prices was driven by "prospects of increasing supply out of Saudi Arabia in the coming months," said Sanjeev Gupta, who heads the Asia-Pacific oil and gas practice at Ernst & Young.

Market chatter suggested that Saudi Arabia was planning to increase production to meet rising demand from countries such as China.

An increase in production usually puts a downward pressure on prices.

Another factor was the stronger US dollar, which rose Wednesday after minutes of the latest US Federal Reserve policy meeting were released.

Minutes of the January 29-30 meeting suggested the central bank could begin tightening its monetary policy even before the US labour market picks up.

"Such belief has caused the dollar to rally against the euro, making commodities less desirable," Phillip Futures said in a market commentary.

- AFP/ck



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Samsung TV Discovery service launches this quarter



Samsung America Senior Vice President Joe Stinziano describes new features for TVs, including a feature that allows users to search all video services and live TV in one screen.



(Credit:
James Martin/CNET)

Samsung today revealed more details about its TV discovery service -- except for the finalized name for the U.S. version -- as the Korean electronics giant gears up for the Mobile World Congress show in Barcelona. Samsung first unveiled the service last month during the Consumer Electronics Show in Las Vegas. At that time, it said users would be able to use one app to navigate all of their different video services on their smart TVs and
tablets, and use their mobile devices as remotes to control their TVs.

Today, it noted that the service will give consumers a way to find live TV and video content, as well as glean personalized recommendations based on viewing and preference history. In the U.S., the offering initially will aggregate content from Netflix and Blockbuster.

The offering will be called "TV Discovery" in most regions, though the U.S. branding has not yet been finalized.

It will launch on Samsung 2013 smart TVs this quarter in the U.S., Korea, and 14 European countries such as the U.K., France, Italy, and Germany. It will expand to mobile devices in the second quarter.

One of the biggest criticisms of smart TVs like those from Samsung is that they're too difficult to use. It can be frustrating and time consuming to navigate between all the different video streaming services on a device, as well as including live TV in the mix. Samsung has said it's making a big push this year to simplify its products, and TV Discovery is one product it hopes will appeal to customers.

"The more you engage with the service, the more relevant the returned recommendations for TV, movies, and other on-demand entertainment," Won-Pyo Hong, president and head of Samsung's Media Solution Center, said. "It could not be simpler."


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NASA's Mars Rover Makes Successful First Drill


For the first time ever, people have drilled into a rock on Mars, collecting the powdered remains from the hole for analysis.

Images sent back from NASA's Mars rover Curiosity on Wednesday confirmed that the precious sample is being held by the rover's scoop, and will soon be delivered to two miniature chemical labs to undergo an unprecedented analysis. (Related: "Mars Rover Curiosity Completes First Full Drill.")

To the delight of the scientists, the rock powder has come up gray and not the ubiquitous red of the dust that covers the planet. The gray rock, they believe, holds a lot of potential to glean information about conditions on an early Mars. (See more Mars pictures.)

"We're drilling into rock that's a time capsule, rocks that are potentially ancient," said sampling-system scientist Joel Hurowitz during a teleconference from NASA's Jet Propulsion Laboratory in California.

A Place to Drill

The site features flat bedrock, often segmented into squares, with soil between the sections and many round gray nodules and white mineral veins.

Hurowitz said that the team did not attempt to drill into the minerals or the gray balls, but the nodules are so common that they likely hit some as they drilled down 2.5 inches (6.3 centimeters).

In keeping with the hypothesis that the area was once under water, Hurowitz said the sample "has the potential of telling us about multiple interactions of water and rock."

The drill, located at the end of a seven-foot (two-meter) arm, requires precision maneuvering in its placement and movement, and so its successful initial use was an exciting and welcome relief. The rover has been on Mars since August, and it took six months to find the right spot for that first drill. (Watch video of the Mars rover Curiosity.)

The flat drilling area is in the lower section of Yellowknife Bay, which Curiosity has been exploring for more than a month. What was previously identified by Curiosity scientists as the dry bed of a once-flowing river or stream appears to fan out into the Yellowknife area.

The bedrock of the site—named after deceased Curiosity deputy project manager John Klein—is believed to be siltstone or mudstone. Scientists said the veins of white minerals are probably calcium sulfate or gypsum, but the grey nodules remain something of a mystery.

Triumph

To the team that designed and operates the drill, the results were a triumph, as great as the much-heralded landing of Curiosity on the red planet. With more than a hundred maneuvers in its repertoire, the drill is unique in its capabilities and complexities. (Watch video of Curiosity's "Seven Minutes of Terror.")

Sample system chief engineer Louise Jandura, who has worked on the drill for eight years, said the Curosity team had made eight different drills before settling on the one now on the rover. The team tested each drill by boring 1,200 holes on 20 types of rock on Earth.

She called the successful drilling "historic" because it gives scientists unprecedented access to material that has not been exposed to the intense weathering and radiation processes that affect the Martian surface.

Mini-laboratories

The gray powder will be routed to the two most sophisticated instruments on Curiosity—the Sample Analysis at Mars (SAM) and Chemistry and Mineralogy (CheMin).

SAM, the largest and most complex instrument onboard, operates with two ovens that can heat the sample up to 1,800°F (982°C), turning the elements and compounds in the rock into gases that can then be identified. SAM can also determine whether any carbon-based organic material is present.

Organics are the chemical building blocks of life on Earth. They are known to regularly land on Mars via meteorites and finer material that rains down on all planets.

But researchers suspect the intense radiation on the Martian surface destroys any organics on the surface. Scientists hope that organics within Martian rocks are protected from that radiation.

CheMin shoots an X-ray beam at its sample and can analyze the mineral content of the rock. Minerals provide a durable record of environmental conditions over the eons, including information about possible ingredients and energy sources for life.

Both SAM and CheMin received samples of sandy soil scooped from the nearby Rocknest outcrop in October. SAM identified organic material, but scientists are still trying to determine whether any of it is Martian or the byproduct of organics inadvertently brought to Mars by the rover. (See "Mars Rover Detects Simple Organic Compounds.")

In the next few days, CheMin will be the first to receive samples of the powdered rock, and then SAM. Given the complexity of the analysis, and the track record seen with other samples, it will likely be weeks before results are announced.

The process of drilling and collecting the results was delayed by several glitches that required study and work-arounds. One involved drill software and the other involved a test-bed problem with a sieve that is part of the process of delivering samples to the instruments.

Lead systems engineer Daniel Limonadi said that while there was no indication the sieve on Mars was malfunctioning, they had become more conservative in its use because of the test bed results. (Related: "A 2020 Rover Return to Mars?")

Author of the National Geographic e-book Mars Landing 2012, Marc Kaufman has been a journalist for more than 35 years, including the past 12 as a science and space writer, foreign correspondent, and editor for the Washington Post. He is also author of First Contact: Scientific Breakthroughs in the Hunt for Life Beyond Earth, published in 2011, and has spoken extensively to crowds across the United States and abroad about astrobiology. He lives outside Washington, D.C., with his wife, Lynn Litterine.


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Newtown Shooter Had Sensory Processing Disorder












From the time he was little, Adam Lanza couldn't bear to be touched. By middle school, the chaos and noise of large, bustling classrooms began to upset him. At 20, just before the Newtown shootings, he was isolated and, the world would later learn, disturbed.


All this was revealed in "Raising Adam Lanza," an investigative report by the Hartford Courant in partnership with the PBS news program FRONTLINE, which aired Tuesday night.


Before the age of 6, Lanza had been diagnosed with a controversial condition, "sensory integration disorder" -- now known as sensory processing disorder, according to the report.


Those with sensory processing disorder or SPD may over-respond to stimuli and find clothing, physical contact, light, sound or food unbearable. They may also under-respond and feel little or no reaction to pain or extreme hot and cold. A third form involves sensory motor problems that can cause weakness and clumsiness or delay in developing motor skills.


In Photos: Sandy Hook Elementary School Shooting, Mourning


Whether SPD is a distinct disorder or a collection of symptoms pointing to other neurological deficits, most often anxiety or attention-deficit hyperactivity disorder (ADHD), has been debated by the medical community for more than two decades.








Parents Cope With Sandy Hook Students' Return to School Watch Video









National Rifle Association Calls for Armed Security at Schools Watch Video









Nurse Sues Michigan Hospital for Discrimination Watch Video





No one will know why the withdrawn Lanza shot his mother four times in her own bed, then went to Sandy Hook Elementary School to slaughter six women and 20 first-graders before taking his own life on Dec. 14, 2012.


But this report, the most detailed account to date on his troubled life, paints a picture of a child coping with special needs and a mother, "devoted but perhaps misguided," struggling unsuccessfully to help.


"The most surprising thing for me was this sort of inwardness of Adam, a world view of someone that was afraid of the world," said show producer Frank Koughan. "He just reacted badly to the whole world and didn't want to be part of it. He was not some violent monster, except on one particular day, when he was exceedingly monstrous."


The investigative team interviewed family and friends of the shooter's parents, Nancy and Peter Lanza, and reviewed a decade's worth of messages and emails from his mother to close friends, describing her son's socially awkward behavior.


"Adam was a quiet kid. He never said a word," Marvin LaFontaine, a friend of Nancy Lanza, told them. "There was a weirdness about him and Nancy warned me once at one of the Scout meetings … 'Don't touch Adam.' She said he just can't stand that. He'd become teary-eyed and I think he would run to his mother."


In 1998, the Lanzas left their home in New Hampshire for Connecticut with Adam, who had already been diagnosed with the sensory disorder and was "coded" with an individual education plan, according to a family member who did not want to be identified by FRONTLINE.


"It was somebody well-placed who was completely in a position to know," said Koughan, 45, a veteran journalist who produced the film, "Drop-Out Nation."


Lanza didn't recognize pain, another feature of some types of SPD. He couldn't cope with loud noise, confusion or change, which would cause him to "shut down," according to the report.


"He'd almost go into a catatonic kind of state, which is another reason why in hindsight, he didn't seem like a threat to anybody," said Koughan. "He didn't lash out or beat up kids. He went within himself, until one day he didn't."






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Today on New Scientist: 19 February 2013







Doctors would tax sugary drinks to combat obesity

Hiking the price of fizzy drinks would cut consumption and so help fight obesity, urges the British Academy of Medical Royal Colleges



Space station's dark matter hunter coy about findings

Researchers on the Alpha Magnetic Spectrometer, which sits above the International Space Station, have collected their first results - but won't reveal them for two weeks



Huge telescopes could spy alien oxygen

Hunting for oxygen in the atmospheres of distant exoplanets is a tough job, but a new wave of giant telescopes should be up to the task



Evolution's detectives: Closing in on missing links

Technology is taking the guesswork out of finding evolution's turning points, from the first fish with legs to our own recent forebears, says Jeff Hecht



Moody Mercury shows its hidden colours

False-colour pictures let us see the chemical and physical landscape of the normally beige planet closest to the sun



LHC shuts down to prepare for peak energy in 2015

Over the next two years, engineers will be giving the Large Hadron Collider the makeover it needs to reach its maximum design energy



Insert real news events into your mobile game

From meteor airbursts to footballing fracas, mobile games could soon be brimming with news events that lend them more currency



3D-printing pen turns doodles into sculptures

The 3Doodle, which launched on Kickstarter today, lets users draw 3D structures in the air which solidify almost instantly



We need to rethink how we name exoplanets

Fed up with dull names for exoplanets, Alan Stern and his company Uwingu have asked the public for help. Will it be so long 2M 0746+20b, hello Obama?



A shocking cure: Plug in for the ultimate recharge

An electrical cure for ageing attracted the ire of the medical establishment. But could the jazz-age inventor have stumbled upon a genuine therapy?



Biofuel rush is wiping out unique American grasslands

Planting more crops to meet the biofuel demand is destroying grasslands and pastures in the central US, threatening wildlife




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Ubisoft sells rivals' games in online shop






SAN FRANCISCO: French videogame maker Ubisoft began selling computer games made by Electronic Arts, Warner Brothers and other rivals at its online Uplay shop.

California-based Electronic Arts, in turn, added Ubisoft hits including "Assassin's Creed III" and "Far Cry 3" to its Origin network for play as the companies ramped up their challenge to Valve Corporation's Steam service.

Third-party computer games available for download from the Uplay shop include a game-of-the-year edition of "Batman: Arkham City" and "Crysis 3," according to Ubisoft.

"We're thrilled to be bringing EA titles to Uplay and Ubisoft titles to Origin -- the more choice for consumers, the better in today's gaming world," said Origin vice president of production Michael Blank.

"Offering games like Dead Space 3, Need for Speed Most Wanted and more on Uplay is a great opportunity to reach even more PC gamers worldwide."

Uplay is an online gaming community boasting 50 million members who access the service from videogame consoles, mobile gadgets, or personal computers.

"Adding excellent titles from EA, Warner Bros. Interactive Entertainment and many other top developers to Uplay shop means that players now have more choice in where and how they purchase games online," said Ubisoft vice president of digital publishing Chris Early.

Origin reports having nearly 40 million users who sign on to play or buy games using computers powered by Windows or Macintosh software, or iPhones, iPads or iPod touch devices.

At the start of this year, Steam network for game software and online play was reported to have more than 54 million active users and laid claim to the lion's share of the videogame digital distribution market.

- AFP/sf



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Apple, Facebook, Twitter hacks said to hail from Eastern Europe



While many security experts have been pointing the blame at China for the recent wave of cyberattacks on U.S. companies and newspapers, Bloomberg reports that some of the malware attacks actually may be coming from Eastern Europe.

Investigators familiar with the matter told Bloomberg they believe a cybercriminal group based in either Russia or Eastern Europe is carrying out the high-level attacks to steal company secrets, research, and intellectual property, which could then be sold on the black market.

Evidence that the attacks may be coming from Eastern Europe is the type of malware being used by the hackers, which is more commonly used by cybercriminals than by government spying. Also, investigators have tracked at least one server being used by the hackers to a Ukrainian hosting company.

Roughly 40 companies have been victims of cyberattacks over the past several months. These companies included tech businesses, such as Apple, Facebook, and Twitter, and newspapers, such as The New York Times, the Wall Street Journal, and the Associated Press.

Apple announced today that hackers targeted computers used by its employees, but that "there was no evidence that any data left Apple." In a statement, the company said it discovered malware that made use of a vulnerability in the Java plug-in, and that it was sourced from a site for software developers. Apple blocked Java from some of its Macs late last month using its XProtect antimalware tool and citing security vulnerabilities.

A report by The New York Times yesterday claimed that an "overwhelming percentage" of the cyberattacks on U.S. corporations, government agencies, and organizations came from an office building in Shanghai with ties to the People's Liberation Army. These allegations remain unconfirmed and flatly denied by Chinese authorities.

The hack on The New York Times itself was months long and included the theft of corporate passwords of Times employees, as well as spying on personal computers. The attacks on Facebook, Twitter, and Apple were a bit different in that reportedly only a small number of systems were infected and the hackers got in via the Java vulnerability.

This isn't the first allegation of cybercriminals operating out of Eastern Europe. Security firm McAfee Labs published a report in December that warned of increasing attacks on U.S. financial institutions from Eastern European hackers. Dubbed Project Blitzkrieg, McAfee said the possible attacks would be done with a highly developed Trojan that could infect victims' computers, plant software, and allow cybercriminals to steal information and money.

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Florida Python Hunt Captures 68 Invasive Snakes


It's a wrap—the 2013 Python Challenge has nabbed 68 invasive Burmese pythons in Florida, organizers say. And experts are surprised so many of the elusive giants were caught.

Nearly 1,600 people from 38 states—most of them inexperienced hunters—registered for the chance to track down one of the animals, many of which descend from snakes that either escaped or were dumped into the wild.

Since being introduced, these Asian behemoths have flourished in Florida's swamps while also squeezing out local populations of the state's native mammals, especially in the Everglades. (See Everglades pictures.)

To highlight the python problem, the Florida Fish and Wildlife Conservation Commission and its partners launched the 2013 Python Challenge, which encouraged registered participants to catch as many pythons as they could between January 12 and February 10 in state wildlife-management areas within the Everglades.

The commission gave cash prizes to those who harvested the most and longest pythons.

Frank Mazzotti, a wildlife ecologist at the University of Florida and scientific leader for the challenge, said before the hunt that he would consider a harvest of 70 animals a success—and 68 is close enough to say the event met its goals.

It's unknown just how many Burmese pythons live in Florida, but catching 68 snakes is an "exceptional" number, added Kenneth Krysko, senior herpetologist at the Florida Museum of Natural History in Gainesville.

Snakes in the Grass

Finding 68 snakes is impressive, experts say, since it's so hard to find pythons. For one, it's been unusually warm lately in Florida, which means the reptiles—which normally sun themselves to regulate their body temperature—are staying in the brush, making them harder to detect, Krysko said.

On top of that, Burmese pythons are notoriously hard to locate, experts say.

The animals are so well camouflaged that people can stand right next to one and not notice it. "It's rare that you get to see them stretched out—most of the time they're blending in," said Cheryl Millett, a biologist at the Nature Conservancy, a Python Challenge partner.

What's more, the reptiles are ambush hunters, which means they spend much of their time lying in wait in dense vegetation, not moving, she said.

That's why Millett gave the hunters some tips, such as looking along the water's edge, where the snakes like to hang out, and also simply listening for "something big moving through the vegetation."

Even so, catching 68 snakes is "actually is a little more than I expected," said Millett.

No Walk in the Park

Ruben Ramirez, founder of the company Florida Python Hunters, won two prizes in the competition: First place for the most snakes captured—18—and second place for the largest python, which he said was close to 11 feet (3.4 meters) long. The biggest Burmese python caught in Florida, nabbed in 2012, measured 17.7 feet (5.4 meters).

"They're there, but they're not as easy to find as people think," said Ramirez. "You're not going to be stumbling over pythons in Miami." (Related blog post: "What It's Like to Be a Florida Python Hunter.")

All participants, some of whom had never hunted a python before, were trained to identify the difference between a Burmese python and Florida's native snakes, said Millett. No native snakes were accidentally killed, she said.

Hunters were also told to kill the snakes by either putting a bolt or a bullet through their heads, or decapitating them-all humane methods that result "in immediate loss of consciousness and destruction of the brain," according to the Python Challenge website.

Ramirez added that some of the first-time or amateur hunters had different expectations. "I think they were expecting to walk down a canal and see a 10-foot [3-meter], 15-foot [4.5-meter] Burmese python. They thought it'd be a walk in the park."

Stopping the Spread

Completely removing these snakes from the wild isn't easy, and some scientists see the Python Challenge as helping to achieve part of that goal. (Read an opposing view on the Python Challenge: "Opinion: Florida's Great Snake Hunt Is a Cheap Stunt.")

"You're talking about 68 more animals removed from the population that shouldn't be there—that's 68 more mouths that aren't being fed," said the Florida museum's Krysko. (Read about giant Burmese python meals that went bust.)

"I support any kind of event or program that not only informs the general public about introduced species, but also gets the public involved in removing these nonnative animals that don't belong there."

The Nature Conservancy's Millett said the challenge had two positive outcomes: boosting knowledge for both science and the public.

People who didn't want to hunt or touch the snakes could still help, she said, by reporting sightings of exotic species to 888-IVE-GOT-1, through free IveGot1 apps, or www.ivegot1.org.

Millett runs a public-private Nature Conservancy partnership called Python Patrol that the Florida wildlife commission will take on in the fall. The program focuses not only on eradicating invasive pythons but on preventing the snake from moving to ecologically sensitive areas, such as Key West.

Necropsies on the captured snakes will reveal what pythons are eating, and location data from the hunters will help scientists figure out where the snakes are living—valuable data for researchers working to stop their spread.

"This is the most [number of] pythons that have been caught in this short of a period of time in such an extensive area," said the University of Florida's Mazzotti.

"It's an unprecedented sample, and we're going to get a lot of information out of that."


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Arias Says Violent Sex Preceded Killing












Jodi Arias and her ex-boyfriend, Travis Alexander,, had increasingly violent sex in which he tied her to his bed, twisted her arm, bent her over a desk for anal sex, and made sex videos with her in the hours leading up to the stabbing and shooting frenzy that left Alexander dead.


It was a day in which Arias, 32, inched closer to telling the court how the killing of Alexander took place, but after several hours of increasingly emotional testimony the court was adjourned until Wednesday.


In her sixth day on the stand, Arias tearfully described the sex-filled hours that led to Alexander's death on June 4, 2008. She is charged with murder for killing her former boyfriend, but claims she was forced to kill him self-defense. She could face the death penalty if convicted.


"He tied me up, (on) the bed. It's not my favorite but it's not unbearable," Arias told the court.


She said he used a kitchen knife in the bathroom to cut the rope to the proper length, but she didn't remember whether he left the knife in the bathroom or brought it back to the nightstand in the bedroom.


"There are a lot gaps that day... a lot of things I don't remember that day," she said.


Arias and Alexander then took graphic sexual photos of one another and made a sex video, both of which Arias said were Alexander's ideas. Arias has girlish braids in the pictures.


But the mood of the afternoon turned, she said, when Alexander became angry over a scratched computer disk of photos she gave him. He threw the CD and Arias said she became "apprehensive" of his rising temper.


"I know he's getting angry because Napoleon [Alexander's dog] got up and left the room and he always leaves the room when he gets mad." she testified.


"I don't know that I was consciously thinking (of violence) but I was more tense. I stood up, went to walk over to him, to rub his back and make sure he was okay," she said. "But he grabbed me on the upper arms, spun me around and grabbed my right arm and twisted it behind my back, and bent me over the desk, and pressed up against me."






Charlie Leight/Pool/The Arizona Republic/AP Photo











Jodi Arias Gives Explicit Details About Doomed Relationship Watch Video









Jodi Arias Murder Trial: Why She Said She Did It Watch Video









Jodi Arias Tells How She Met Ex-Boyfriend on Stand Watch Video





"I was scared he was going to throw me or something, kick me," she continued. "He pressed his groin up against my butt, did a few thrusts and then started pulling my pants down."


The pair then had anal sex, which Arias said pacified Alexander.


"I was very relieved. I felt like we had avoided catastrophe. It could have led to another fight," she said.


Instead of a fight, Alexander, who was 27 and a devout Mormon, and Arias decide to go upstairs and take more nude photos of one another. Arias said she hoped the photos would satisfy Alexander over his frustration with the scratched CD.


Evidence introduced earlier in the trial show that Alexander was killed while Arias was photographing Alexander in the shower.


Catching Up on the Trial? Check Out ABC News' Jodi Arias Trial Coverage


Timeline of the Jodi Arias Trial


Earlier, Arias explained that she wasn't planning to visit Alexander during her roadtrip from her home in California, but was convinced by him to spontaneously take a detour to his house for sex and to hang out.


"The very last time I called Travis it was kind of like, I don't know how to describe it, he had been very sweet and was guilting me and making me feel bad that I was taking this big trip without going to see him," Arias said this afternoon.


"When I called him last time it was just like all right, I'm going," she said. "(Sex) was our thing at that time. I wasn't going to go there, stay the night and not do that."


Arias' attorney, Kirk Nurmi, asked her repeatedly on the stand if Arias brought a gun or knife with her on the roadtrip and to Alexander's house. She said that she did not.


She also denied a series of allegations made by the prosecution that she dyed her hair, rented an inconspicuous car, borrowed gas cans, turned off her cell phone, and switched money around her bank accounts as she left for Alexander's house because she was planning to murder him when she got there.


Arias said that her hair remained the same color, auburn-brown, throughout May and June, that she rented a car because her own car was not stable enough for highway travel, that she requested a white car instead of a red one because police pull red ones over more often, and that she transferred money to a business banking account for a tax write-off to classify it as a business trip.


The testimony about the road trip and Arias' planning could be key to the jury as they decide whether the killing was pre-meditated, as the prosecution claims. Arias could face the death penalty if convicted of murder with aggravating factors such as pre-meditation.


Arias said that she "didn't sleep at all last night" before testifying about the dramatic incident today. Her comment was stricken from the record.


Arias also described a barrage of threatening text messages sent by Alexander in which he told her he would exact "revenge" on her soon and called her a "sociopath."


She told the court that Alexander's temper would make her "cower."


The messages show a growing discord between the pair in April 2008, less than two months before Arias killed Alexander.






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Biofuel rush is wiping out unique American grasslands








































Say goodbye to the grass. The scramble for biofuels is rapidly killing off unique grasslands and pastures in the central US.













Christopher Wright and Michael Wimberly of South Dakota State University in Brookings analysed satellite images of five states in the western corn belt. They found that 530,000 hectares of grassland disappeared under blankets of maize and soya beans between 2006 and 2011. The rate was fastest in South Dakota and Iowa, with as much as 5 per cent of pasture becoming cropland each year.











The trend is being driven by rising demand for the crops, partly through incentives to use them as fuels instead of food.













The switch from meadows to crops is causing a crash in populations of ground-nesting birds. One of the US's most important breeding grounds for wildfowl, an area called the Prairie Pothole Region, is also at risk, with South Dakota's crop fields now within 100 metres of the wetlands. "Half of North American ducks breed here," says Wright.












Bill Henwood of the Temperate Grasslands Conservation Initiative in Vancouver, Canada, says the results are distressing. "Exchanging real environmental impacts for the dubious benefits of biofuels is counterproductive," he says. "Last year's record drought in the corn belt all but wiped out the crops anyway."












Journal reference: PNAS, DOI: 10.1073/pnas.1215404110


















































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