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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Scuffles at Dutch MP Wilders' Australia event

MELBOURNE: Mounted police restored order as scuffles broke out outside an Australian venue where Dutch far-right politician Geert Wilders was speaking, but authorities said on Wednesday that no arrests were made.

Populist Wilders spoke on Tuesday night in Melbourne, receiving a standing ovation from several hundred people who had heard him warn that mass migration from Islamic nations could change Australia.

Police horses were brought to the Melbourne venue as protesters attempted to block the entrance, but there were no major incidents.

"We didn't have any arrests made," a Victoria police spokeswoman told AFP.

Wilders is also due to speak in Sydney on Friday, but an event in the western city of Perth has been cancelled after a venue could not be found to host the controversial politician.

The right-wing MP said at a press conference ahead of his Melbourne engagement that while he wanted a ban on Islamic immigration, he was not trying to incite violence.

"If you think that what has happened in Europe will not happen to Australia, then you are totally wrong," he said.

While he admitted most Muslims were not extremists, he added: "Islam and freedom are incompatible."

"It's bad if you have the crazy idea that all cultures are equal," he added. "Islam really is not part of our culture."

Victorian Premier Ted Baillieu has urged people to ignore the Dutchman while the Islamic Council of Victoria said it trusted the community would "see through his hateful speech and dismiss it for the empty rhetoric that it is".

- AFP/gn

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Killing, carjacking spree ends with suicide

A man, believed to be the shooter, lies dead in the street near an Orange County Sheriff's vehicle in Villa Park, California.

STORY HIGHLIGHTS

• Ali Syed killed three, wounded three during spree that involved carjackings in Orange County, police say


• Authorities: Syed first killed woman at his parents' home, then shot at motorists


• Suspect killed himself after police spotted him north of Tustin, police say

(CNN) -- In the middle of a shooting spree that killed three people and unleashed terror on Southern California motorists Tuesday morning, Ali Syed told one of his carjacking victims to walk away, police say.

"Mr. Syed ... said, 'I don't want to hurt you, I killed somebody. Today's my last day. Give me your keys,' " Tustin Police Chief Scott Jordan told reporters.

According to preliminary accounts from police, Syed, 20, didn't intentionally spare another target.

Police say they believe Syed, a part-time college student, fatally shot a woman at his family's Ladera Ranch home before killing two other people -- including a senior citizen executed outside his vehicle -- and wounding three others as he fired a shotgun at Orange County motorists on the Costa Mesa Freeway and committed three carjackings.

The spree ended when Syed died after he turned his gun on himself as police approached on a road north of Tustin, authorities say.

The Orange County Sheriff's Department says it was called to the Ladera Ranch home, where Syed lived with his parents, on a report of shots fired about 4:45 a.m. PT.

A woman in her 20s was found dead there. Police said she wasn't related to Syed, but they didn't release her name, and they said they didn't know why she was at the home.

Syed left the home in his parents' SUV, police said. About 25 minutes after that police call and 20 miles to the northwest, Syed drove into a Denny's and Big Lots parking lot in Tustin, exited the vehicle and shot a driver in the back of the head, Jordan said.

The wounded motorist -- a man who was waiting for his son to carpool with him to work -- managed to drive away before stopping near an overpass, Jordan said. The victim was being treated Tuesday, police said.

That's when Syed, whose SUV had a flat tire, approached the man he would spare. Syed ran toward the man at a nearby gas station, took his keys and drove the pickup truck away without firing at him, Jordan said.

Syed then drove south on the Costa Mesa Freeway, exited onto a transition road, got out of the vehicle and fired a shotgun at southbound vehicles on the freeway, hitting three vehicles, police said.

One of the freeway drivers was wounded in the hand and face, but investigators don't know whether the wounds were from shotgun rounds or debris, according to Jordan.

Police said Syed then drove to nearby Santa Ana, crashing the pickup into a curb on a freeway off-ramp. There, he pointed the shotgun at Melvin L. Edwards, 69, of Laguna Hills, who was in a BMW at a stop sign.

"Syed ... got (Edwards) out of the car at gunpoint, walked him across the road and executed him -- shot him three times," Jordan said.

Syed drove Edwards' BMW to the parking lot of a Tustin-area Micro Center computer store, where police said he found his next two shooting victims.

Syed shot and killed Jeremy Lewis, 26, of Fullerton, who was in a vehicle in the lot, police said. Lewis had worked at a construction site across the street.

People from the construction site then approached, and Syed shot and wounded one of them in the arm, Jordan said. Syed entered that person's vehicle and drove north on the Costa Mesa Freeway before exiting again.

By that time, authorities had received many phone calls about the shootings, and California Highway Patrol officers found Syed driving at an intersection about 5 miles north of Tustin, Jordan said.

Syed exited the vehicle as it slowly rolled near the intersection, according to police.

"There really wasn't a confrontation at that very end," Jordan said. "As soon as he got out of his vehicle, before it actually came to a complete stop, he shot and killed himself," Jordan said.

Syed was unemployed and taking one class at Saddleback College in Mission Viejo, an Orange County Sheriff's Department spokesman said.

Police said they're trying to determine what led to the shootings, and that they didn't yet know of a motive.

CNN's John Fricke contributed to this report.

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What's next in the looming budget crisis?

(CBS News) WASHINGTON -- We are nine days from the next national self-inflicted budget crisis: big, across-the-board cuts in the federal budget will hit automatically on March 1. The cuts are designed to be so deep and damaging that they would force the president and Congress to compromise on a better way.

"These cuts are not smart, they are not fair, they will hurt our economy, they will add hundreds of thousands of Americans to the unemployment rolls," President Barack Obama said Tuesday. "This is not an abstraction. People will lose their jobs. The unemployment rate might tick up again."

Watch: Obama warns of the dangers of the "sequester," below.

Obama wants more tax revenue, but Republicans say no. Both sides say it's up to the other to give in.

There will be a continued effort by the White House to apply public pressure on Republicans to relent. This will be done in public, in events such as Obama's speech Tuesday; it's already been done privately.

Top government officials are warning businesses they could be harmed by these looming spending cuts. For example, last Friday, top officials at the Agriculture Department warned meat and poultry producers that there might not be enough federal inspectors to keep their processing plants open and operating.

These are designed to motivate businesses to plead with Republicans to find another way. For now, Republicans appear prepared to take these spending cuts, because they say they will argue to the public they're more serious about deficit reduction than President Obama.

Obama to GOP: Put away the "meat cleaver"
GOP losing faith on sequester alternative?
With sequester looming, Congress takes a break

There are currently no behind-the-scenes negotiations between the White House and Republicans. Republicans say this is President Obama's problem and that he needs to solve it with new spending cuts, because they refuse to raise taxes again this year.

As for talks, the top aide to House Majority Leader Eric Cantor joked Tuesday that President Obama has spent more time playing golf with Tiger Woods than he has negotiating with congressional Republicans.

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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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Rugby: All Blacks coach frustrated at Kahui move

WELLINGTON: All Blacks coach Steve Hansen expressed disappointment at Richard Kahui's decision to play in Japan next year, saying he was frustrated the centre never gave him a chance to change his mind.

Kahui announced last week that he would move to Top League club Toshiba Brave Lupus in 2014 after seeing out the Super 15 season with the Waikato Chiefs.

"We were very disappointed with that because he didn't really speak to us, or his agent didn't," Hansen told commercial radio. "I always find that a bit frustrating."

Hansen said he would have appreciated an opportunity to put a counter-offer to Kahui, who was a key member of New Zealand's World Cup-winning team in 2011 and helped the Waikato Chiefs to the Super 15 title last year.

Kahui said last week that he decided to play in Japan to secure his future after a string of shoulder injuries, which has restricted him to just 17 Tests since his international debut in 2008.

The 27-year-old will not be eligible to play for the All Blacks while in Japan but has canvassed the possibility of returning to his homeland in 2015 so he can help New Zealand defend its World Cup title in England.

Hansen said Kahui was taking a gamble as there was no guarantee an up-and-coming centre would not cement a spot in his absence.

"He's talked about coming back, but he, like everybody else, takes a big risk when they leave because there're other people here who have got talent," he said.

"But he's weighed that up and believes he can come back. Hopefully, he does and hopefully he comes back and plays to the level that can get him selected."

- AFP/al

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Coast Guard identifies cause of cruise ship fire

STORY HIGHLIGHTS

• NEW: Coast Guard: The fuel line ran from an engine to a fuel tank


• There is no indication the leak was intentional, a Coast Guard official says


• The crew is praised for doing a "very good job" containing the fire

Washington (CNN) -- The fire that crippled the Carnival cruise ship Triumph started with a leak in a fuel-oil return line running from one of the ship's engines, the U.S. Coast Guard said Monday.

Leaking oil hit a hot surface, starting the fire, said Teresa Hatfield, the lead investigator for the Coast Guard. Hatfield said there was no indication the leak in a flexible hose section was intentional.

"Fire suppression was immediately activated by the crew, first by waterfog and then by (carbon dioxide). They did a very good job," Hatfield said.

"We are looking at the cause of the fire and why the ship was disabled for so long, and we are also looking at the crew response to the fire as well."

Moments from aboard the ship

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Hatfield said the investigation will last for several months. The Coast Guard said it has conducted 21 interviews with passengers and crew members since Thursday, when investigators boarded the ship while it was still at sea.

Hatfield said the oil return line is one of the items that is routinely inspected, but she did not say when it was last inspected or describe its condition at that time.

Vance Gulliksen, a spokesman with Carnival Cruise Lines, told CNN Monday that the ship's last scheduled Coast Guard inspection was on November 15. Gulliksen also said the cruise line agreed with the Coast Guard's determination of the origin of the fire.

Coast Guard spokesman Carlos Diaz said the line ran from the ship's "number-6 engine" to a fuel tank.

The Triumph was on the third day of a planned four-day cruise from Galveston, Texas, to Mexico when the fire broke out and brought the trip to a halt. It was carrying more than 4,200 people, including 3,100 passengers. The Triumph was eventually towed into port in Mobile, Alabama, Thursday night, and the last passengers disembarked Friday.

Stranded on the crippled ship, passengers and crew lived with worsening conditions, as toilets stopped working, and waste spilled onto floors and into hallways. Passengers had to use plastic bags to collect their waste.

Passenger Cassie Terry described the ship as "a floating toilet, a floating Petri dish, a floating hell" in a lawsuit filed Friday against Carnival for unspecified damages related to the cruise.

Passengers reported long lines for food, shortages of fresh water and widespread boredom. Many passengers slept in hallways or outside to escape the odors and heat below decks.

Patrick Cuty, a senior marine investigator for the Coast Guard, told CNN Sunday that investigators had located the area where flames erupted in the engine room.

"We know that the fire originated in front of a generator," Cuty said. "You can see the ignition marks on the wall."

There are three generators in the engine room where the fire broke out. Three other generators are in a second engine room that wasn't involved in the fire, Cuty said.

The same ship encountered a problem in January with its propulsion system, according to a notice posted on the website of Carnival senior cruise director John Heald.

On Saturday, Carnival crew members were bused to and from the ship to help with the clean-up. One housekeeper told CNN it wasn't pleasant work but said it had to be done, and the crew was willing to do it.

Passengers have praised the crew for its response during the ordeal.

Because the Carnival Triumph is a Bahamian-flagged vessel, the Bahamas Maritime Authority is the primary investigative agency and will work with the Coast Guard and the National Transportation Safety Board.

Investigators pulled the voyage data recorder, a device that records alarms, voice communications on the bridge, engine speed, navigation information and rudder angle, Cuty said.

It appears that the fire suppression worked as designed, Cuty said Friday. The engineer who was on watch around dawn February 10 saw the fire ignite over a video feed and immediately notified the bridge, Cuty said.

On crippled cruise ship, icky jobs fell to 'amazing' crew

Lawsuit filed over 'floating hell' cruise

CNN's Jim Barnett contributed to this report.

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WH: Leaked immigration plan is only partial draft

(CBS News) WASHINGTON -- Over the weekend, a partial White House plan for immigration reform leaked to the press and caused an uproar.

White House officials tell CBS News that what was leaked is real -- it's a partial draft of half a bill. What we know is the administration's current thinking about what to do about the estimated 11 million illegal immigrants living in the United States right now.

The administration wants a temporary four-year visa to provide legal status -- meaning no more deportations -- that could be renewed. After eight years, they can apply for what's known as permanent legal residency, or, more commonly, a Green Card.

(At left, watch White House Chief of Staff Denis McDonough discuss the leaked immigration plan on "Face the Nation.")

There's also administration thinking on border security and an unspecified increase in border security, subject to negotiations with Congress. For workers who try to find jobs in the future and who might not have documents, the plan includes an E-Verify system to make sure undocumented workers aren't given jobs.

GOP: Leaked WH immigration plan "counterproductive"
W.H. immigration plan circulating in case Congress talks "break down," McDonough says

What's missing is a section dealing with all future legal immigration issues: high-skilled workers, seasonal farm workers and workers who work in hotels or restaurants. Without that, this plan doesn't have much of a chance.

The plan is not likely to get through Congress without the section dealing with legal immigration. That's why Republicans were so critical this weekend.

Last year, Republicans criticized the president for being missing in action and failing to draft a bill. Now that he admits he is, Republicans say he's contaminating that process; they argue that if you don't have a comprehensive bill -- one that can pass Republicans and Democrats in both the House and Senate -- this is a futile effort.

The White House says Republicans are going to be dared to vote up or down eventually, and that they better get used to that.

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Obama's Speech on Guns Doesn't Stop Ill. Killing

A Chicago teenager was shot and killed Friday only hours after her sister attended President Obama's speech on the city's rampant gun violence.
Janay McFarlane, 18, was killed while walking with a friend during a visit to her dad, Herbert McFarlane, in North Chicago.

"All this gun violence going on, you never think it would be your child," he told ABC's Chicago station WLS. "This is the hardest thing for me in my life."

Herbert McFarlane told WLS that the loss of Janay is especially hard because she leaves behind a 3-month old son, who likes to wear an "I love Mommy" shirt. The shooting occurred in Lake County, a northern suburb miles from the epicenter of the gun violence on the city's South Side.

"I'm in Lake County to get away from violence and now it happened in Lake County where I moved to," he told WLS.

McFarlane and her child spent time both in Lake County and on the South Side where her mother lives.

Janay Proudmommie Mcfarlane/Facebook

Mother of Slain Chicago Teen Makes Plea for Stronger Gun Laws Watch Video

Indiana National Guardsman Dies Shielding Son From Gunfire Watch Video

Obama Addresses Gun Violence Issue During State of the Union Watch Video

Only hours before McFarlane was shot and killed, President Obama returned to his hometown to speak on the South Side at a Hyde Park high school. McFarlane's sister, Destini Warren, 14, sat behind the president during the speech.

More than 500 people were shot and killed here last year, and this year the situation has worsened with the most deadly January the city has seen in over a decade. The shooting death of Hadiya Pendleton, a 15-year old who performed in Washington, D.C. at events connected to the president's inauguration last month, garnered national attention.

"Too many of our children are being taken away from us," Obama said in Hyde Park, with McFarlane's sister in the audience.

"Last year there were 443 murders with a firearm on the streets of this city, and 65 of those victims were 18 and under," he said. "So that's the equivalent of a Newtown every four months." He was referring to Newtown, Conn., where 20 first graders were gunned down by Adam Lanza along with seven adults.

Only hours later in Chicago, another 18-year old was shot and killed.

"I felt like someone took a knife and stabbed me in the heart, and a piece of my heart I will never get back," Angela Blakely, Janay McFarlane's mother, told WLS.

North Chicago Police on Sunday reportedly questioned two people in connection to McFarlane's death. Her family said McFarlane was an unintended target of the shooting.

Messages left by ABC News with the North Chicago Police Department and the Lake County Coroner's Office went unreturned Monday.

Another Chicago teenager, Frances Colon, was also shot and killed Friday just hours after she had told her father that she saw President Obama's helicopter fly over her neighborhood.

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