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Archive for the ‘Feature’ Category

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Scientist Smackdown: Are Solar Neutrinos Messing With Matter?

SunSDOThe sun is breaking the known rules of physics—so said headlines that made the rounds of the Web this week.

That claim from a release out about a new study by researchers Jere Jenkins and Ephraim Fischbach of Purdue, and Peter Sturrock of Stanford. The work suggests that the rates of radioactive decay in isotopes—thought to be a constant, and used to date archaeological objects—could vary oh-so-slightly, and interaction with neutrinos from the sun could be the cause. Neutrinos are those neutral particles that pass through matter and rarely interact with it; trillions of neutrinos are thought to pass through your body every second.

In the release itself, the researchers say that it’s a wild idea: “‘It doesn’t make sense according to conventional ideas,’ Fischbach said. Jenkins whimsically added, ‘What we’re suggesting is that something that doesn’t really interact with anything is changing something that can’t be changed.’”

Could it possibly be true? I consulted with Gregory Sullivan, professor and associate chair of physics at the University of Maryland who formerly did some of his neutrino research at the Super-Kamiokande detector in Japan, and with physicist Eric Adelberger of the University of Washington.

(more…)

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August 26th, 2010 Tags: arXiv, neutrinos, radioactive decay, Scientist Smackdown, subatomic particles, sun
by Andrew Moseman in Feature, Physics & Math | 44 Comments » | RSS feed | Trackback >

5 Offshore Oil Hotspots Beyond the Gulf That Could Boom–or Go Boom

OffshoreOilAfter the fallout from the BP oil spill in the Gulf of Mexico—the dispersal agents, the containment domes, the apologies, the blame game, the court rulings over who should pay, the know-nothing punditry, and all the environmental wreckage—offshore oil drilling will go on. The cold truth is that we need the oil, and under the sea is one place we can still find it—in part because extracting it is sufficiently difficult that companies focused on easier-to-get deposits in the past.

There’s plenty of oil under the Gulf, which became perfectly clear when responders couldn’t stem the flow of the current spill, allowing thousands of barrels to leak into the water every day. But other undersea sites are loaded with oil—and are similarly expensive and risky to exploit. Here are five that might be particularly promising, and prone to trouble.

1. Alaska’s north shore

The Deepwater Horizon accident caused President Obama to put his plans to open more U.S. waters to energy exploration on hold. But the President’s proposal, which could well be resurrected, included allowing bids to drill in the Chukchi and Beaufort seas on Alaska’s northern coast after 2013 if viability studies gave the thumbs-up. Also, in 2009 Obama gave Shell the conditional go-ahead for a project in the Beaufort.

There’s just one problem, the Coastal Response Research Center says: We’re not ready. While the increasing ice melt in the Arctic might open up more area to the possibility of drilling, a spill would be disastrous. Responding to a major spill is a logistical nightmare even somewhere with the proper infrastructure, as the BP oil spill has shown. But the north shore of Alaska is remote, and the weather is bad. Slicks would be difficult to see in the winter, with the sun barely, or never, coming over the horizon. And while the National Oceanic and Atmospheric Administration has provided those handy 72-hour forecasts for the oil spreading in the Gulf, they’re still working on how to model the spread of oil in icy water.

2. The Gulf of Guinea

Nigeria and Cameroon are among the countries that bound the Gulf of Guinea, located at the big bend in Africa’s west coast. It’s one of the most promising regions in the world for offshore oil deposits. The United States already imports a sizable chunk of its oil from the region, and an International Monetary Fund working paper (pdf) in 2005 said that the U.S. could look to up its investment in the region as a way to lessen reliance on turbulent Middle Eastern countries.

And then, there were pirates. A slew of attacks in the last two years targeted oil supply vessels, fishing boats, and other ships. Even in 2008 the Center for Investigative Journalism reported that attacks on oil installations slowed Nigerian production from 2.5 to 1.5 million barrels per day.

3. The Sea of Okhotsk

The treacherous, icy continental shelf on the north of Russia extends thousands and miles and could be laden with energy reserves, but right now the Russians have their eyes on the eastern part of their huge country, specifically the Sea of Okhotsk. Presently Russia is pushing the United Nations to expand its territorial claim further over the sea’s shelf so it can begin trying to the tap the perhaps billions of tons of oil, and trillions of cubic feet of natural gas, in the sea.

Truly, though, Okhotsk is an unpleasant and dangerous place to work. To sum it up:

The Sea of Okhotsk is subject to dangerous storm winds, severe waves, icing of vessels, intense snowfalls and poor visibility. The average annual extreme low ranges between -32°C and -35°C. Ice sheets up to 1.5m thick move at speeds of 1-2 knots.

During the ice-free period, wave heights range between 1-3m, but can reach as high as 19m during 100-year storm conditions. Strong north-east and south-east winds cause a great amount of sea agitation in autumn and winter [Offshore Technology].

4. Deepwater Angola

Angola is the new kid on the block. In 2007 it joined the Organization of Petroleum Exporting Countries (OPEC). It has knocked off Nigeria as West Africa’s number one oil producer. In March it beat out Saudi Arabia to become China’s number one oil supplier. And the United States’ Energy Information Administration reports that Angola is trying to grow even faster, to as high at 3 million barrels a day by 2015. If not for OPEC production limits, it might be able to grow even faster.

BP, ExxonMobil, and other huge oil companies produce oil here. One of BP’s deepwater operations here, the Greater Plutonio, lies in water as deep as 5,000 feet—roughly the same depth at the Deepwater Horizon leaks.

And Angola is, in a word, dangerous. Part of the reason so much of the nation’s oil infrastructure is offshore is to get away from the land, where civil war raged from 1975 to 2002. While the politics may have stabilized somewhat, a University of Texas assessment points out (pdf) another problem of Angolan production: it’s a long way from China, the U.S., or Europe, meaning longer tanker trips.

5. Brazil’s Santos Basin

The good news: The Tupi oil field, out to sea south of Rio de Janeiro, could hold enough oil to up Brazil’s oil reserves by 50 percent. The bad news: Tupi is stuck below a layer of salt that in some places is up to 6,500 feet thick.

Brazilian oil giant Petrobras wants to start exploring the region as soon as this year. But no one knows for sure what they’re getting into. The salt layer supposedly acts like a sludge, and explorers have traditionally tried to avoid going through such formations. The energy consulting firm Wood Mackenzie estimated it would take upward of $100 billion to fully explore, and Offshore Techonlogy says the region could be 10 times pricier to explore than the other deposits off the Brazilian coast that Petrobras currently explores.

Outside the Gulf Coast region, Brazil is the world’s most promising ultra-deepwater producer, with new discoveries in the past five years in the so-called Santos basin that experts think will make the South American giant a powerhouse in the oil business [Kansas City Star].

Brazil’s National Petroleum Agency is getting in on the act, too. Last week it made an oil discovery in the Santos Basin—but at a depth of nearly 18,000 feet.

Image: Wikimedia Commons

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May 6th, 2010 Tags: environmental policy, Gulf of Mexico Oil Spill, ocean, oil & gas, pollution
by Andrew Moseman in Environment, Feature | 4 Comments » | RSS feed | Trackback >

E.O. Wilson’s New Novel Finds Life Lessons in an Anthill

OB-HY428_anthil_DV_20100325Many children have a “bug period”–a time of life when bugs and creepy crawlies are a source of endless fascination and learning. Naturalist Edward O. Wilson jokes that unlike other kids, he never grew out of his bug period.

Luckily for this biologist, his lifelong passion for ants has yielded a career rich in accomplishment and accolades. He is not just the world’s preeminent expert on the social behavior of ants, but also the recipient of the National Medal of Science and two Pulitzer Prizes for nonfiction. Now, at the age of 80, Wilson has taken a stab at fiction. His first novel, Anthill, combines two of his greatest loves–his childhood home, Alabama, and the ants that have been his lifelong friends.

Described as an “six-legged Iliad,” Wilson’s Anthill draws parallels between human and ant societies. Though there are no ant symphony orchestras, secret police, or schools of philosophy, both ants and men conduct wars, divide into specialized castes of workers, build cities, maintain infant nurseries and cemeteries, take slaves, practice agriculture, and indulge in occasional cannibalism, though ant societies are more energetic, altruistic, and efficient than human ones [The New York Review of Books].

The book’s first and third sections deal with the adventures of an Alabama boy named Raphael Semmes Cody, called Raff. The boy grows up poking around the lush pine savanna of the Nokobee Tract; he’s drawn to its natural wonders, and uses the forest to escape from his parents’ toxic marriage. In this pristine woodland he literally leaves no stone unturned as he discovers the forest’s rich flora and fauna. Raff grows up and heads to Harvard to study law, returning later in life to protect the Nokobee from feckless developers. But fans of Wilson’s science will be most interested in the book’s middle section, where the author inserts a mini-novella describing the trials and tribulations of the ants living in the endangered forest.

(more…)

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April 9th, 2010 Tags: animal behavior, Anthill, ants, e.o.wilson, insects, literature
by Smriti Rao in Environment, Feature, Living World | 1 Comment » | RSS feed | Trackback >

A Novel That Laughs Along with Climate Change: Ian McEwan’s Solar

Solar“It’s a catastrophe. Relax!”

Those are the words of Michael Beard, the Nobel laureate physicist long past his prime who is the anti-hero of Ian McEwan’s new novel Solar, out this week in the United States. McEwan, no stranger to writing scientist characters or scientific themes, dives this time headlong into climate change. McEwan says he was nervous attempting to write fiction about a subject that has the potential to be, well, dull. But Solar is a laugh-out-loud read thanks to its ridiculous protagonist and willingness to make light of the apocalyptic seriousness of the conversation.

At the book’s outset, in the year 2000, Beard isn’t particularly convinced about climate change. He’s coasting on his reputation as a Nobelist, making money giving repetitive lectures and sitting on various boards, when suddenly he finds himself in charge of a shiny new British government research center out to build the next new thing in alternative energy. In the second part of “Solar,” Beard has become a believer in global warming, working on a way to get non-carbon power from artificial photosynthesis—a new application of a never-quite-explained theory that he came up with in his 20s. Unfortunately, he didn’t discover the application himself. He stole it from his dead assistant [Wall Street Journal], the marvelously enthusiastic (or at least enthusiastic until an unfortunate encounter with a coffee table) Tom Aldous.

(more…)

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April 1st, 2010 Tags: climate change, energy, global warming, Ian McEwan, literature, photosynthesis, solar power
by Andrew Moseman in Environment, Feature | 1 Comment » | RSS feed | Trackback >

Vaccinating School Kids Can Protect the Whole “Herd” of Community Members

hypodermic-needle-vaccineAn extensive study conducted on school children in Western Canada has proved that immunizing kids and adolescents goes a long way towards protecting the entire community from communicable diseases like the flu, thanks to a phenomenon known as “herd immunity.”

The findings come at a time when vaccine phobia is one of our largest public health concerns, with many parents worrying that immunizing kids can lead to adverse side affects. A recent survey revealed that one in four U.S. parents think that vaccines might cause autism, probably due in part to a 1998 paper published in the journal The Lancet that wrongly linked autism to vaccines–that paper has since been refuted, and fully retracted by the journal.

Now, scientists have more evidence that vaccines provide a public health benefit. Researchers studying youngsters in 49 remote Hutterite farming colonies in Canada found that giving flu shots to almost 80 percent of a community’s children created a herd immunity that helped protect unvaccinated older people from illness. As children often transfer viruses to each other first and then pass them along to grown-ups, the study provided solid proof that the best way to contain epidemics like the recent H1N1 outbreak is to first vaccinate all the kids. By immunizing the most germ-friendly part of the herd first, you indirectly protect the rest of the community, scientists say.

(more…)

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March 11th, 2010 Tags: antivax, flu shots, herd immunity, pandemic, vaccination
by Smriti Rao in Feature, Health & Medicine | 2 Comments » | RSS feed | Trackback >

Obama’s NASA Plan Draws Furious Fire; The Prez Promises to Defend His Vision

SpaceShuttleTakeoffYou can’t cancel an enormous federal program without hitting pushback, and President Obama is hitting plenty of it over his proposal to end NASA’s Constellation program. In January his budget proposal put forth no funding for Constellation, the space shuttle successor program that included the Ares rockets, Orion crew capsule, and plans to send astronauts back to the moon by 2020. Instead, NASA would become more reliant on private companies to ferry its astronauts to the space station, and would explore new ideas for visiting Mars or nearby asteroids. But the proposal has already ruffled lots of feathers, prompting the President to say he will hold a conference to further outline his plan.

First, many high-profile space experts balked at the proposal. Former astronaut Tom Jones said Obama was surrendering human spaceflight, and Apollo 17 astronaut Harrison Schmitt, one of the last men to walk on the moon, was equally displeased. “It’s bad for the country,” Schmitt said. “This administration really does not believe in American exceptionalism” [Washington Post]. Dissent wasn’t universal; DISCOVER blogger Phil Plait, for one, praised the possibilities for commercial space-faring.

(more…)

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March 10th, 2010 Tags: NASA, President Obama, space flight, space shuttle, SpaceX
by Andrew Moseman in Feature, Space | 21 Comments » | RSS feed | Trackback >

Microsoft Rejoins the Smart Phone Revolution With the Windows 7 Phone

MS-phoneAfter being bypassed and outclassed by other companies in the mobile-technology space, Microsoft has announced plans to chuck its old Windows Mobile operating system and start afresh with the Windows 7 Phone Series. Judging by company’s big reveal at the Mobile World Congress–and the ensuing buzz in the blogosphere–the rebooted Microsoft phone may already be a surprisingly strong contender.

After the successful launch of Windows 7 operating system last year, Microsoft announced on Monday that the company will soon be launching its Windows 7 Phone Series. No date was mentioned at the Barcelona announcement yesterday, but some expect the phones to be out in late 2010–just in time to be a holiday offering. The Windows Phone 7 launch caps a year of product launches met with critical praise. There was the launch of Microsoft’s impressive new search engine (Bing), a popular new operating system suite of cloud-based products (Office Web Apps), and a revitalized Web presence (MSN.com) [PCWorld].

At the phone’s launch at Mobile World Congress 2010, Microsoft CEO Steve Ballmer said the operating system will integrate deeply not just with current social networking sites likes Facebook, Twitter, and LinkedIn but will also bring Xbox LIVE games and the Zune music and video experience to the mobile phone. With this phone, the world’s largest software manufacturer hopes to make a serious dent in a consumer market already populated with Apple’s iPhone, RIM’s Blackberry, and phones using Google’s Android operating software.

A few bloggers who got their hands on the Windows 7 Phone Series report breathlessly that the display is like nothing they have seen before. The interface, they say, is clean and simple with no busy backgrounds, no drop-shadows, shaded icons, or faux 3-D. The whole look is strangely reminiscent of a terminal display (maybe Microsoft is recalling its DOS roots here) — almost Tron-like in its primary color simplicity[Engadget].

(more…)

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February 16th, 2010 Tags: cell phones, gadgets, Microsoft, windows 7
by Smriti Rao in Feature, Technology | 6 Comments » | RSS feed | Trackback >

How Henrietta Lacks’s Cells Became Immortal and Changed Medical Science

The-Immortal-Life-of-Henrie You may have learned of the line of cells known as the HeLa strain in a biology class, where a teacher explained the “virtually immortal” nature of these rapidly multiplying cells, and how they played a defining role in science. Over the last six decades, the prolific HeLa cells have been used to develop the first polio vaccines, test chemotherapy drugs, and develop techniques for in vitro fertilization. With their amazing capacity to multiply, the cells are an endless bounty to scientists. HeLa has helped build thousands of careers, not to mention more than 60,000 scientific studies, with nearly 10 more being published every day, revealing the secrets of everything from aging and cancer to mosquito mating and the cellular effects of working in sewers [The New York Times].

But for all that research, little was known about the origin of the cells or about the unwitting donor who supplied them–Henrietta Lacks (The “He” in HeLa stands for Henrietta and “La,” for Lacks). Lacks was a 30-year old black tobacco worker who died of cervical cancer nearly 60 years ago. She died in a public ward for “coloreds” at the then-segregated Johns Hopkins hospital in Baltimore.

In a new book, The Immortal Life of Henrietta Lacks, author Rebecca Skloot explores Henrietta Lacks’s impoverished background and raises troubling ethical questions. She notes that Lacks’s cells are still used to this day, but the family never received a penny and was largely unaware of the fate of the cells. Over the course of 10 years, Skloot worked with Lacks’s daughter Deborah to uncover the real story behind the HeLa cells.

(more…)

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February 8th, 2010 Tags: HeLa cells, Henrietta Lacks, literature, rebecca skloot
by Smriti Rao in Feature, Health & Medicine, Technology | 2 Comments » | RSS feed | Trackback >

MRI Brain Scans Show Signs of Consciousness in Some “Vegetative” Patients

brain-3A few months ago, Belgian man Rom Houben hit the headlines for a misdiagnosis that lasted 23 years. Houben was thought to have lost all brain function in a horrific car accident, and was believed to be in a persistent vegetative state. New evaluations helped determine that Houben actually had normal brain activity, and was yearning to communicate–although the “facilitated communication” his family used to allow Houben to tell his story quickly kicked up a kerfuffle over the validity of the whole tale.

Now, a new study published in The New England Journal of Medicine gives credence to the notion that some patients who have been classified as vegetative are actually conscious, and a rare few may be able to communicate.

The researchers used functional magnetic resonance imaging (fMRI) to scan patients’ brains, and to record any activity generated in the patients’ brains following verbal prompts and questions from the doctors. They found signs of awareness in four patients, one of whom was able to answer basic yes or no questions by activating different parts of his brain. Experts said Wednesday that the finding could alter the way some severe head injuries were diagnosed — and could raise troubling ethical questions about whether to consult severely disabled patients on their care [The New York Times].

(more…)

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February 4th, 2010 Tags: brain, coma, neuroscience
by Smriti Rao in Feature, Health & Medicine, Mind & Brain | 4 Comments » | RSS feed | Trackback >

Scientist Smackdown: Did a Nuclear Blast on Earth Create the Moon?

moonHow on Earth did the moon come into being? If you subscribe to the latest theory, the moon was born out of a nuclear explosion on Earth that sent a chunk of mass flying from the planet’s core into orbit, where it finally became the moon. But cool as that sounds, some killjoy scientists are pooh-poohing the hypothesis, calling it “unnecessary,” “nonsensical,” and “not physically sensible.”

The standard theory of the moon’s origin holds that a giant space object, possibly an asteroid, banged into Earth and sent a large piece of the planet flying into space. That piece eventually became the moon. But the composition of the moon doesn’t seem to support this theory. Researchers say if an asteroid or some such object smashed away part of the Earth, the Moon ought to be composed of about 80 percent of that object’s constituent material and about 20 percent of the Earth’s. But the makeup of moon rock closely mirrors that of the Earth [Popular Science].

An alternate theory, known as the fission theory, suggests that the moon spun out of the rapidly spinning blob of molten rock that would later become Earth [Popular Science]. But no one has been able to explain what caused a huge chunk of earth to spin away and become the moon. Now, researchers Rob de Meijer and Wim van Westrenem have proposed in an online paper that centrifugal forces may have concentrated heavy, radioactive elements like uranium and thorium at the boundary between the Earth’s mantle and its core. Then, they propose, a massive nuclear explosion occurred at the edge of Earth’s core, flinging red-hot, liquid rock into space. The orbiting detritus gradually congealed into what is now our planet’s lone satellite [Discovery News].

Such “georeactors” have existed on Earth before, albeit on a smaller scale than these researchers propose. But de Meijer and van Westrenem have gotten little support for their hypothesis, and plenty of scorn.

(more…)

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February 4th, 2010 Tags: arXiv, moon, nuclear energy, Scientist Smackdown
by Smriti Rao in Feature, Space | 13 Comments » | RSS feed | Trackback >

The Fracas Over the “Abstinence Education Works” Study

sex edThere’s been lots of gloating, arguing, and tossing around of cliches like “game-changing” in the wake of a new study on abstinence education and its potential to reduce sexual activity in teens. But the study isn’t exactly what the political forces trumpeting its arrival would like you to believe.

The study appears in the journal Archives of Pediatrics & Adolescent Medicine. In its introduction, study leader John B. Jemmott III concludes that “Theory-based abstinence-only interventions may have an important role in preventing adolescent sexual involvement.”

So what’s actually in the study? Between 2001 and 2004, Jemmott’s team studied 662 African-American middle schoolers in the northeastern United States, who were each paid $20 a session to attend sex-education classes. The kids were randomly assigned to one of several different programs: One program emphasized only abstinence, one both safe sex and abstinence, one just safe sex, and the last was a control group that simply taught healthy living—eating well, exercise, and the like.

(more…)

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February 3rd, 2010 Tags: pregnancy, sex & reproduction, teens
by Andrew Moseman in Feature, Health & Medicine | 10 Comments » | RSS feed | Trackback >

Obama’s NASA Budget: So Long, Moon Missions; Hello, Private Spaceflight

Ares-I-X-test-flightThe Obama administration’s new budget may come in at a hulking $3.8 trillion, but one thing it doesn’t include is continued funding for the Constellation program. The program, which was intended to continue the work of the aging space shuttles, will get the ax if Congress approves the President’s plan. This also means that NASA would abandon its goal of returning to the moon by 2020.

Obama’s budget ends work on the shuttle follow-on vehicle, known as Orion, as well as a pair of rockets developed to fly astronauts to the space station, the moon and other destinations in the solar system. “We are proposing canceling the program, not delaying it,” Peter Orszag, director of the Office of Management and Budget, told reporters [Reuters]. The announcement had been some time in coming: The Augustine panel that Obama convened last year to review human spaceflight concluded that Constellation couldn’t succeed without $3 billion in additional annual  funding, and rumors broke out last week that the President’s budget would kill the program for good.

In place of the Constellation program’s Ares rockets and Orion crew capsule, Obama’s plan calls for funneling money to private companies that are jockeying for NASA contracts. The Washington Post reports that the plan would funnel $6 billion to support private space companies developing a vehicle to ferry astronauts back and forth from the International Space Station. Companies expected to seek the new space taxi business include United Launch Alliance, a partnership between Boeing and Lockheed Martin that launches rockets for theUnited States Air Force, and Space Exploration Technologies, a start-up company led by Elon Musk, who founded PayPal [ The New York Times]. The plan would also extend the life of the space station until 2020.

Commercial Spaceflight Federation president Bretton Alexander was understandably giddy at the prospect of private companies taking center stage. “At a time when job creation is the top priority for our nation, a commercial crew programme will create more jobs per dollar because it leverages millions in private investment and taps the potential of systems that serve both government and private customers,” he said [BBC News].

(more…)

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February 1st, 2010 Tags: International Space Station, NASA, President Obama, space shuttle, spaceflight
by Andrew Moseman in Feature, Space | 37 Comments » | RSS feed | Trackback >

Meet the “Puffin,” NASA’s One-Man Electric Plane

The one-man stealth plane of the future is on the horizon–and it’s named after a conspicuously cute bird. NASA scientists will officially unveil their design for a hover-capable, electric-powered aircraft, nicknamed “the Puffin,” on Wednesday at an American Helicopter Society meeting in San Francisco.

On the ground, the Puffin is designed to stand on its tail, which splits into four legs to help serve as landing gear. As it prepares to take off, flaps on the wings would tilt to deflect air from the 2.3-meter-wide propeller rotors upward, keeping the plane on the ground until it was ready to fly and preventing errant gusts from tipping it over. The Puffin would rise, hover and then lean over to fly horizontally, with the pilot lying prone as if in a [hang] glider [Scientific American].

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January 20th, 2010 Tags: aviation, flight, NASA, Puffin
by Smriti Rao in Feature, Technology | 15 Comments » | RSS feed | Trackback >

Generation iPod: Young’Uns Spend 53 Hours a Week Consuming Media

teen-on-computerWhen your kid isn’t in class, he/she is probably listening to an iPod, flipping TV channels, or switching between tabs on their computer, which means they may be juggling between Myspace, Facebook, and YouTube–in other words, kids today are staying hyperconnected and wired through their waking hours. That reality is confirmed by a new study done by the Kaiser Family Foundation, which reveals that if your kids are awake, they’re probably online [The New York Times].

In the third of a series of large-scale national surveys, the Kaiser Foundation study found that kids between the ages of 8-18 years now spend an average of 7 hours, 38 minutes per day using entertainment media. That adds up to more than 53 hours of entertainment consumption in a week. And this does not include the time kids spending texting or talking on their cell phones.

(more…)

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January 20th, 2010 Tags: computers, family health, internet, learning, social networking
by Smriti Rao in Feature, Health & Medicine, Mind & Brain | 8 Comments » | RSS feed | Trackback >

GM Corn & Organ Failure: Lots of Sensationalism, Few Facts

cornUPDATE: On Tuesday, Gilles-Eric Séralini responded by email to the criticisms in this post. Mostly, he says, the answers can be found in the study itself. But where he has addressed these criticisms in particular, we have included that below in italics. Séralini stresses that while the data he had available was limited, his findings show that you can’t say these GM corn varieties are safe enough to put on the market and authorize for human consumption right now.

On Wednesday, we covered the overreaction by a few important online sources to an International Journal of Biological Sciences article claiming to find “signs of toxicity” in three varieties of genetically modified (GM) corn produced by Monsanto. We posted some caveats that made us uneasy about the study, such as the funding sources, the unknown quality of the journal, and the fact that the toxicity claims rely on reinterpreting statistical data that Gilles-Eric Séralini and his coauthors themselves note is not as robust as it needs to be.

Karl Haro von Mogel, a University of Wisconsin Ph.D. student who works with Pamela Ronald (the GM expert we quoted in our last post), responded with some other problems he has on this study. He has a blog post of his own (in which he gets hopping mad at coverage that attributed organ damage, organ failure, or even cancer to the rats in the study). But here are the major issues he points out to DISCOVER:

1. Cherry-picking. “They were picking out about 20–30 significant measurements out of about 500 for one of the sets of data they analyzed,” Haro von Mogel tells DISCOVER. “At the 95% significance level, you would expect that 5% of the observations would show a significant difference due to chance alone, which is what happened.” In other words, one would expect to get some alarming results in approximately 25 out of the 500 of the measurements, which is indeed what they found. “Picking apart what seems to be normal background variability seems to me to be data dredging.”

Séralini: We have not  chosen the significant measurements, we have listed all the parameters  disturbed, all indicated by stars (see Tables joines), there are 20 on 60 for  NK603, 15/60 for MON 810 and 23/60 for MON 863 (other paper published in  2007). This is a lot, concentrating mostly on liver and kidneys, the major  organ reacting in case of chemical intoxication by food.

One must understand that there are the only  blood mammalian analyses allowing the commercialization of these GMOs in the  world, these tests lasting only three months and kept secret for the crude  data before our study.

(more…)

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January 15th, 2010 Tags: biotechnology, Genetic Engineering, genetically modified foods
by Andrew Moseman in Environment, Feature, Living World | 46 Comments » | RSS feed | Trackback >

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      80beats is DISCOVER's news aggregator, weaving together the choicest tidbits from the best articles on the day's most compelling topics.

      80beats is written by Veronique Greenwood and Valerie Ross. This team darts through each day's science news faster than the ruby-throated hummingbird that beats its wings 80 times per second. Send ideas, tips, suggestions, and complaints to [azeeberg at discovermagazine dot com].



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