Plants listen more closely to kin than strangers









































It is not just humans that like a natter with their nearest and dearest – plants pay most attention to their closest relatives.











When an insect bites a leaf, many plants release volatile chemicals to prime their neighbours for attack. The defences this triggers vary – some plants respond by attracting predatory insects that eat the herbivores, others make themselves less tasty.













Now Richard Karban of the University of California, Davis, has shown that for the sagebrush, responses to these warning signals can vary with relatedness.












At the start of three growing seasons, Karban's team exposed different branches of the same plants to volatile chemicals. The substances came from relatives of the same species whose leaves had been clipped to trigger chemical release.












By the end of the seasons, herbivores had done less damage to the branches exposed to chemicals from close relatives than to those receiving signals from more distant relatives – the warning probably prompting the plants to release herbivore-deterring chemicals, says Karban.












He has previously shown that the blend of volatiles varies enormously between individuals – "so much so that big peaks in some individuals are undetectable in others", he says.












However, there is some similarity between family members. Karban thinks this variability is being exploited by the plants as a kind of family-specific signature, to prevent eavesdroppers from listening in and to give those that share the same genes a greater chance of survival.












Some plants are genetically more resistant to being eaten than others, so it makes sense that plants should care more about their kin's fate than that of the general population.












"It is very elegant work," says Susan Dudley from McMaster University in Ontario, Canada, who has shown that plants competing for space in a small pot are less aggressive if they are related to their neighbours.












She thinks this kind of kin-recognition is probably common among many plants.












Journal Reference: Proceedings of the Royal Society B, doi: 10.1098/rspb.2012.3062


















































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Peru archeologists find ancient temple






LIMA: Peruvian archaeologists have discovered a temple believed to be about 5,000 years old at the ancient archaeological site of El Paraiso in a valley just north of Lima, the Culture Ministry said Tuesday.

If the date is confirmed, it would be among the oldest sites in the world, comparable to the ancient city of Caral, a coastal city some 200 kilometres (125 miles) to the north.

The discovery, dubbed the Temple of Fire, was found in one of the wings of El Paraiso's main pyramid. It includes a hearth that experts believe was used to burn ceremonial offerings.

"The smoke allowed the priests to connect with the gods," said Marco Guillen, who led the team of researchers who made the find.

Archaeologists found the hearth in mid-January as they were carrying out conservation work at a set of 4,000-year-old ruins known as El Paraiso, located some 40 kilometers northeast of Lima in the Chillon River Valley.

The discovery shows "that the Lima region was a focus of civilizations in the Andean territory," Deputy Culture Minister Rafael Varon told reporters.

Archaeologists believe the ancient coastal civilisations raised crops including cotton, which they traded with coastal fishermen for food.

El Paraiso, spread across 50 hectares (125 acres), has 10 buildings and is one of the largest ancient sites in central Peru.

-AFP/gn



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Tip: Use OS X services to reveal or open file paths



Apple's Spotlight offers a quick way to find user files and resources like applications or system preferences. However, it does not locate items in the system folder or in hidden folders, though at times you might need to access them. This limitation may be especially cumbersome to deal with if you are troubleshooting a problem in OS X or helping someone do so, meaning you may need to ask them to locate a specific hidden file and remove it or modify its contents.


For some system resources you can simply navigate through the Finder; however, in its default view the Finder does not show a number of hidden files and folders such as the user library. So, for example, if you tell someone to access his or her user library to locate the Fonts folder, since the user library is hidden he or she might instead erroneously access the global library at the root of the hard drive.




Reveal and Open contextual menu services

Right-clicking a selected text path will show an option in the Services menu to open or reveal the path in the Finder.



(Credit:
Screenshot by Topher Kessler/CNET)



Even if you are familiar with standard Unix file path notation and direct someone to open the ~/Library folder, if that person doesn't know what the tilde character means then he or she might go to the wrong directory in the Finder.



To get around these potential areas of confusion both for yourself and when instructing others, you can make use of some services and features in OS X that make possible quick access to any file or folder based on a typed path you provide, which can help avoid confusion and make it straightforward for anyone to open a specified Unix-compliant path.


The first option is to use the system's contextual services: if you have a full Unix-compliant path typed out, then you can simply highlight it, right-click the selected text, and then choose either Open or Reveal from the Services contextual menu, and the system will then display the item in the Finder or try to open it with its default handling application.


For example, you can triple-click the following folder path examples or otherwise select each in its entirety, and try opening the items in the Finder (note that if you use the Open service the system may ask for confirmation before opening the path):




Open and Reveal service warning in OS X

This warning may show up if you use the Open service.



(Credit:
Screenshot by Topher Kessler/CNET)


~/Library/Fonts

/System/Library/CoreServices

/var/db/dslocal/nodes

/Volumes


If you come across a file path as part of an instruction for tweaking your system or troubleshooting it, you can use these services to access it by selecting the file path and right-clicking in this way. Additionally, if you are attempting to help others access parts of their systems and you know the exact file or folder path they should use, then you can likewise send it to them and have them perform this procedure to quickly open it.




Open and Reveal services in OS X

These services can be enabled or disabled in the Keyboard system preferences. You can also assign them custom hot keys if desired.



(Credit:
Screenshot by Topher Kessler/CNET)


These contextual services are built into OS X and should be enabled by default, but if they aren't then they can be enabled in the Services section of the Keyboard system preferences, under the Keyboard Shortcuts tab.


While useful for opening a full file path from a text document or Web page, these options are also convenient in other areas. If you are a power user and access the Terminal regularly, then you probably have a number of file paths listed in your command history that you previously acted upon. If you need to open one of these paths in the Finder, you can use these services to quickly select and open it.


A last and related way to navigate through a full file path is to use the OS X Go to Folder feature that is available in the Finder's Go menu (and can also be invoked by pressing Shift-Command-G). With this option, you can copy a full file path or even a partial one with respect to the directory of the current Finder window, and then paste it in the Go to Folder field instead of using the Open or Reveal services, which should open it for you in the Finder. For example, select and copy any of the file paths listed above, and then paste it in the Go to Folder field to have the system open it in the Finder.




Questions? Comments? Have a fix? Post them below or !
Be sure to check us out on Twitter and the CNET Mac forums.


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Your Shot: Blizzard Photos From Our Readers








































































































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Officer Dies After Dorner Shootout; Cabin on Fire













The remote California mountain cabin in which fugitive ex-cop Christopher Dorner has barricaded himself in tense standoff with police is on fire, following a shootout with police in which one officer was killed and another wounded.


Once the fire started, a single shot was heard from inside the cabin and then flames and a large column of black smoke were seen rising above the snow-covered trees near Big Bear, Calif., ABC station KABC-TV in Los Angeles reported.


Dorner is a former Navy marksman and Los Angeles Police Department officer charged with murdering a police officer and suspected in the deaths of two other people, including the daughter of a former LAPD captain, earlier this month.


Dozens of local, state and federal authorities are at the scene in the San Bernardino Mountains, and have the the cabin surrounded. Dorner has sworn to kill police and their family members in a manifesto discovered online last week.


FULL COVERAGE: Christopher Dorner Manhunt


The search for Dorner, one of the largest manhunts in recent memory, took a turn this afternoon when police received a call that a suspect resembling Dorner had broken into a home in the Big Bear area, taken hostages and stolen a car.


Police said the former cop, believed to be heavily armed and extremely dangerous, took two women hostage before stealing a car just around 12:20 p.m. PT, police said.








Christopher Dorner Manhunt: Police Exchange Fire With Possible Suspect Watch Video











Fugitive Ex-Cop Believed Barricaded in Cabin, California Cops Say Watch Video





The two hostages, who were tied up by Dorner but later escaped, were evaluated by paramedics and were determined to be uninjured.


Officials say Dorner crashed the stolen vehicle and fled on foot to the cabin where he barricaded himself and exchanged fire with deputies from the San Bernardino Sheriff's Office and state Fish and Game officers.


Two deputies were wounded in the firefight and airlifted to a nearby hospital, where one died, police said. The second deputy was in surgery and was expected to survive, police said.



PHOTOS: Former LAPD Officer Suspected in Shootings


Police have sealed all roads going into the area and imposed a no-fly zone above the cabin, nestled in a wooded area that has received several inches of snow in recent days.


Four Big Bear area schools were briefly placed on lockdown.


The San Bernardino County Sheriff's Department stopped all traffic leaving the area and thoroughly searched vehicles, as SWAT team and tactical units could be seen driving toward the cabin, their sirens blaring.


Authorities say they believe Dorner may be watching reports of the standoff and have asked media not to broadcast images of police surrounding the cabin.


"If he's watching this, the message ... is: Enough is enough. It's time to turn yourself in. It's time to stop the bloodshed. It's time to let this event and let this incident be over," said Los Angeles Police Department spokesman Andy Smith, told reporters at a press conference.


Dorner faces capital murder charges that involve the killing of Riverside police officer Michael Crain, who was gunned down in an ambush last Thursday.


Since then a massive manhunt has been under way, focused primarily in the San Bernardino Mountains, but extending to neighboring states and as far away as Mexico.


A capital murder charge could result in the death penalty if Dorner is captured alive and convicted. Crain was married with two children, aged 10 and 4.





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Arctic sunshine cranks up threat from greenhouse gases









































IT'S a solar double whammy. Not only does sunlight melt Arctic ice, but it also speeds up the conversion of frozen organic matter into carbon dioxide.











The amount of carbon in dead vegetation preserved in the far northern permafrost is estimated to be twice what the atmosphere holds as CO2. Global warming could allow this plant matter to decompose, releasing either CO2 or methane – both greenhouse gases. The extent of the risk remains uncertain because the release mechanisms are not clear.













Rose Cory at the University of North Carolina at Chapel Hill and her colleagues analysed water from ponds forming on melting permafrost at 27 sites across the Arctic. They found that the amount of CO2 released was 40 per cent higher when the water was exposed to ultraviolet light than when kept dark. This is because UV light, a component of sunlight, raises the respiration rate of soil bacteria and fungi, amplifying the amount of organic matter they break down and the amount of CO2 released.












The thawing Arctic is emerging as a potentially major source of positive feedback that could accelerate global warming beyond existing projections. "Our task now is to quantify how fast this previously frozen carbon may be converted to CO2, so that models can include the process," Cory says.












Journal reference: PNAS, DOI: 10.1073/pnas.1214104110.




















































If you would like to reuse any content from New Scientist, either in print or online, please contact the syndication department first for permission. New Scientist does not own rights to photos, but there are a variety of licensing options available for use of articles and graphics we own the copyright to.




































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American Express card users can shop at Twitter






SAN FRANCISCO: American Express began letting users of its payment cards make purchases with messages fired off at Twitter as the popular social network dabbles with making money from e-commerce.

American Express announced that members who synchronize their cards with Twitter can take advantage of offers "tweeted" by the financial services company.

American Express will promote products in messages fired off at Twitter. Card holders buy items by tweeting indicated hashtags, with their accounts being charged accordingly.

Depending on the offers, products will be shipped to buyers or picked up in shops.

"We're leveraging our unique technology and closed-loop network to introduce a seamless solution that redefines what's possible in the world of social commerce," said American Express senior vice president Leslie Berland.

"We know there is significant power in combining our assets with Twitter's platform."

American Express said cardholders will be able to buy Sony, Amazon.com, Xbox 360 or Urban Zen products in tweets by using special hashtags, or words preceded by the "#" symbol.

Twitter and American Express have worked together in the past with alliances that let cardholders take advantage of discounts offered in coupons tweeted by merchants.

- AFP/ck



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Tesla's Elon Musk lambasts New York Times article



Tesla's Model S.



(Credit:
Tesla)


Tesla's CEO Elon Musk has become incensed over a critical news article about the all-electric car that was published in The New York Times last week.

"I do not think this is a he said, she said situation," Musk told Bloomberg West in an interview today. "It is really black and white. The facts are the facts."

The tussle got started after New York Times reporter John Broder wrote an article about taking the Tesla Model S out on a test drive in the East Coast's freezing weather. He claimed that the
car couldn't keep a charge and ultimately died before reaching its intended destination. Before leaving on his trip, Broder said he charged the car until the display read "charge complete;" and then, working to conserve the battery while driving, he said he turned off the car's heat and drove on cruise control at 54 mph.

Musk alleges that none of this is true and he has the car logs to prove it.

"We will publish the actual logs on the car and it is crystal clear," Musk told Bloomberg West.

According to Musk, the logs show that Brody did not charge the car to full capacity before taking off on his trip. Also, the reporter allegedly took an unplanned detour through Manhattan and drove well above the speed limit. Musk claims it was these actions that drove the battery down, rather than the cold or some default of the car.

"If you do all those three things, which we were clear should not be done and obviously common sense suggests should not be done, then you will not be able to go as far," Musk told Bloomberg West. "If you did not fill a gasoline car's gas tank far enough, then went on a detour and ran out of gas, you should not be surprised if that occurs."

The New York Times is standing by its reporter, however. According to The Verge, the newspaper said, "The Times's February 10th article recounting a reporter's test drive in a Tesla Model S was completely factual, describing the trip in detail exactly as it occurred. Any suggestion that the account was "fake" is, of course, flatly untrue."

CNET contacted Tesla and The New York Times for comment. We'll update the story when we get more information.

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Kumbh Mela: Pictures From the Hindu Holy Festival








































































































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Who's Next? A Look at Likely Successors to Benedict





With 1 billion Catholics worldwide, the face of the church is changing.



It's something the cardinal electors may keep in mind when the conclave to elect a new pontiff begins in late March, said Matthew Bunson, general editor of the Catholic Almanac and author of "We Have a Pope! Benedict XVI."



RELATED: Pope Benedict XVI Resigns: The Statement



The 117 cardinals who are eligible to vote for the new pontiff hail from approximately 50 different countries, and they almost always elect one of their own.



Joseph Ratzinger, an intellectual and respected cardinal from Germany, was the frontrunner for the papacy in 2005, Bunson said. When elected, he became Pope Benedict XVI.



This year, there are no strong favorites.



"The door, in a way, is very much open," Bunson said.



FULL COVERAGE: Pope Benedict XVI Resignation



Here's a quick look at some of the possible picks for pope:




Angelo Cardinal Scola, 71, Italy


Scola was named the Archbishop of Milan in 2011, a prominent post in the Roman Catholic church.


"If we had to pick a frontrunner, it's him," Bunson said. "He first is a brilliant theologian and has the intellectual heft to be pope, which is crucial. He has the clear favor of Pope Benedict.


Milan and Venice together have produced five popes in the past century.


Scola is also committed to promoting an understanding across faiths.


He started the Oasis Foundation in 2004, which helps bridge a dialogue between Christians and Muslims.


Helen Alvaré, a professor of law at George Mason University and an advisor to Pope Benedict XVI's Pontifical Council for the Laity, agreed that Scola will be considered papabili -- an Italian word for someone highly qualified for the papacy.


"It would not be surprise me if a Scola, or another great European mind also was determined to be what was needed for the times," she said.

Marc Cardinal Ouellet, 68, Canada


The former Archbishop of Quebec, who now heads the Congregation of Bishops, has a deep knowledge of the global workings of the church, Bunson said.


"He has had a major role in the appointment of the church's leaders around the world," Bunson said.


And he points out that at 68 years old, Ouellet has age on his side.


Ouellet is someone who could have "worldwide reach," Alvaré said.


"The man who is chosen for the position he has is someone who is understood to have the presence and the future of the church in mind," she said.

Peter Cardinal Turkson, 64, Ghana


Turkson, who hails from Ghana, may be in the running.


He is currently the president of the Pontifical Council for Justice and Peace, a post he was appointed to by Pope Benedict XVI in 2009.


The job has sent Turkson, who speaks six languages, around the world to handle mediations.


"The fact that an African cardinal is a candidate to be elected pope is the statement to the diversity of the church and the remarkable growth around the world," Bunson said.


Turkson discussed the possible of a black pope at a press conference in 2009, following the U.S. presidential election.


"And if by divine providence -- because the church belongs to God -- if God would wish to see a black man also as Pope, thanks be to God," he said.


Francis Cardinal Arinze, from Nigeria, has also been discussed as a potential pope.

Leonardo Cardinal Sandri, 69, Argentina


With a large center of Catholic faithful in Latin America, Sandri could become the first pope from the region.


The 69-year-old, who was born in Argentina to Italian parents, served as a chief of staff in the Vatican, often reading public message when Pope John Paul II was in declining health.


It was Sandri who announced the passing of the pontiff in St. Peter's Square on April 2, 2005.


"He's well-liked around the world," Bunson said.


He currently serves on the Congregation for the Oriental Churches, acting as a liason with Eastern European Catholic churches.


Sandri is fluent in English, Spanish, Italian, German and French.

Angelo Cardinal Bagnasco, 70, Italy


The Archbishop of Genoa has a "reputation for intellectual heft," Bunson said.


Bagnasco, two-time president of the Italian Bishops Conference, has a history of taking a strong stance on church doctrine.


In 2007, he was the subject of death threats after he led a campaign against proposed Italian legislation to grant some legal rights to unmarried couples, including people in same-sex relationships.


Italians form the largest voting block in the College of Cardinals, with 25 percent of the seats, and could help propel Bagnasco into the papacy.

Tarsicio Cardinal Bertone, 78, Italy


The current Cardinal Secretary of State is a strong candidate if the Holy Spirit wants another great European mind at the helm of the church, Alvaré said.


Bertone runs the day-to-day business of the Roman Curia, the Vatican's government.


He has reportedly been criticized by Vatican officials for his handling of issues ranging from sexual abuse in the church to Vatican finances.


In an open letter last year, Pope Benedict XVI acknowledged the in-fighting and pledged his support for his secretary of state.


"I've noted with regret the unjust criticism directed at your person," the pope wrote. "I intend to reaffirm my pledge of personal faith in you."


Although he's held in high regard by the pope, Bunson believes Bertone's age will keep him from the papacy.


"His age is against him," he said, pointing out that Bertone is the same age as his boss when he was elected.

Timothy Cardinal Dolan, 63, New York


While the thought of an American pope has long seemed impossible, Cardinal Dolan should not be ruled out, Alvaré said.


"History is changing," she said. "We've been at this a while here in the states, [although] not anywhere as long as Europe."


Dolan, an affable cardinal well-known by Catholics in the U.S. and abroad, "has been grappling with some of the leading questions that face the church for the future," Alvaré said.


In September 2012, along with comedian Stephen Colbert, he co-led a discussion on faith and humor at Fordham University.


"If I am elected pope, which is probably the greatest gag all evening, I'll be Stephen III," he told the crowd of students.


Despite Dolan's good standing, Bunson said he has some doubts.


"It strikes me as unlikely, simply because we are the world's last superpower," he said of the U.S. "So I think that might factor in."


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