astroengine writes "With the help of Europe's Herschel Space Observatory and the Atacama Large Millimeter/submillimeter Array (ALMA) in Chile, a team of astronomers have made a lucky discovery about TW Hydrae, the nearest star to the solar system that plays host to a protoplanetary disk. Not only have they gained a more precise estimate of the mass of the material inside the protoplanetary disk, they've also found that it may produce a system of worlds similar to that of the solar system. TW Hydrae may look like the solar system did over 4 billion years ago (abstract). Interestingly, TW Hydrae is also a star that would normally be considered too mature to host a protoplanetary disk. "If there's no chance your project can fail, you're probably not doing very interesting science. TW Hydrae is a good example of how a calculated scientific gamble can pay off," said Thomas Henning, of the Max Planck Institute for Astronomy in Heidelberg."
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Better known by his stage name "The Amazing Randi", James Randi has made it his quest to "debunk psychic nonsense, disprove paranormal fakers, and squash claims of pseudoscience in order to bring the truth to the forefront." Randi worked as a popular magician most of his life and earned international fame in 1972 when he accused the famous psychic Uri Geller of being a fraud and challenged him to prove otherwise. In 1996 Randi founded The James Randi Educational Foundation (JREF) a non-profit organization whose mission includes "educating the public and the media on the dangers of accepting unproven claims, and to support research into paranormal claims in controlled scientific experimental conditions." He began offering $1000 in 1964 to anyone who could demonstrate proof of the paranormal. That amount has grown over the years, and the foundation's prize for such proof is now $1M. Around 1000 people have tried to claim the prize so far without success. Randi has agreed to take a break from busting ghostbusters and giving psychic healers a taste of their own medicine in order to answer your questions. As usual, you're invited to ask as many questions as you'd like, but please divide them, one question per post.
Zothecula writes "Taking a two-month-old in for vaccination shots and watching them get stuck with six needles in rapid succession can be painful for child and parent alike. If the work of an MIT team of researchers pans out, those needles may be thing of the past thanks to a new dissolvable polymer film that allows the vaccination needle to be replaced with a patch. This development will not only make vaccinations less harrowing, but also allow for developing and delivering vaccines for diseases too dangerous for conventional techniques." The patch was designed with delivering DNA-based vaccines in mind. Thus far efforts to use DNA to generate more robust and safe vaccines has failed thanks to the immune system destroying them; the polymer film embeds itself in your skin and slowly dissolves, protecting the DNA in the process.
Lasrick writes "This article starts with an interesting anecdote: 'In 1998, President Bill Clinton read a novel about biological warfare that deeply disturbed him. In fact, the story reportedly kept him up all night. It’s one of the reasons that Clinton became personally invested in protecting the United States from bioterrorism threats. The book was The Cobra Event (Preston, 1998), a sci-fi thriller by journalist and novelist Richard Preston that told of a mad scientist who brewed a lethal, genetically engineered virus in his New York City apartment. Preston’s tale highlighted the potential ease with which individuals or small groups with access to advanced bioweapons capabilities could launch attacks on major US cities.1 After reading The Cobra Event, Clinton called several advisory meetings and ordered classified assessments and simulation exercises to examine the threat depicted in the story. As a result of these deliberations, by the end of his administration Clinton had increased funding for biodefense preparedness efforts fourfold, to more than $400 million per year.' The article goes on to describe the two trajectories of bioweapons threats, and puts them both in perspective. It may or may not calm everyone who's ever spent a sleepless night after reading one of the many bioterrorism novels"
dp619 writes "Ross Gardler, of Apache Fame, has written a guest post on the Outercurve Foundation blog advocating that universities accelerate the research process through a collaborative sharing and development of research software while examining reasons why many have been reluctant to publish their source code. Quoting: 'These highly specialized software solutions are not rarely engineered for reuse. They are often hacks to answer a specific question quickly. ... What many academic researchers fail to understand is that this specialization problem is not unique to research projects. Most software developers will seek to provide an adequate solution to their specific problem, as quickly as possible. They don't seek to build a perfect, all-purpose, tool set that can be reused in every conceivable circumstance. They simply solve the problem at hand and move on to the next one. The difference is that open source developers will do this incremental problem solving using shared code. They will share that code in incremental steps rather than wait until they've built the complete system they need but is too specific for others to use. Other people will reuse and improve on the initial solution, perhaps generalizing it a little in the process. There is no need to share the details of why one needs a 'green widget' nor is there any reason to prevent someone modifying it so it can be either a 'green widget' or a 'blue widget.'"
coondoggie writes "Stanford researchers said this week they had used a supercomputer with 1,572,864 compute cores to predict the noise generated by a supersonic jet engine. 'Computational fluid dynamics simulations test all aspects of a supercomputer. The waves propagating throughout the simulation require a carefully orchestrated balance between computation, memory and communication. Supercomputers like Sequoia divvy up the complex math into smaller parts so they can be computed simultaneously. The more cores you have, the faster and more complex the calculations can be. And yet, despite the additional computing horsepower, the difficulty of the calculations only becomes more challenging with more cores. At the one-million-core level, previously innocuous parts of the computer code can suddenly become bottlenecks.'"
sciencehabit writes "Researchers have identified three genetic mutations that appear to have helped humans survive in the frigid climate of Siberia over the last 25,000 years. One helps the body's fat stores directly produce heat rather than producing chemical energy for muscle movements or brain functions, a process called 'nonshivering thermogenesis.' Another is involved in the contraction of smooth muscle, key to shivering and the constriction of blood vessels to avoid heat loss. And the third is implicated in the metabolism of fats, especially those in meat and dairy products—a staple of the fat-laden diets of Arctic peoples."
sciencehabit writes "Each year, hundreds of millions of metric tons of dust, water, and humanmade pollutants make their way into the atmosphere, often traveling between continents on jet streams. Now a new study confirms that some microbes make the trip with them, seeding the skies with billions of bacteria and other organisms—and potentially affecting the weather. What's more, some of these high-flying organisms may actually be able to feed while traveling through the clouds, forming an active ecosystem high above the surface of the Earth."
chicksdaddy writes "Google cemented its reputation as the squarest company around Monday (pun intended), offering prizes totaling Pi Million Dollars — that's right: $3.14159 million greenbacks — in its third annual Pwnium hacking contest, to be held at the CanSecWest conference on March 7 in Vancouver, British Columbia. Google will pay $110,000 for a browser or system level compromise delivered via a web page to a Chrome user in guest mode or logged in. The company will pay $150,000 for any compromise that delivers 'device persistence' delivered via a web page, the company announced on the chromium blog. 'We believe these larger rewards reflect the additional challenge involved with tackling the security defenses of Chrome OS, compared to traditional operating systems,' wrote Chris Evans of Google's Security Team."
The recipient of nineteen honorary doctorates, and honors from three U.S. presidents, Ray Kurzweil's accolades are almost too many to list. A prolific inventor, Kurzweil created the first CCD flatbed scanner, the first omni-font optical character recognition, the first print-to-speech reading machine for the blind, the first text-to-speech synthesizer, and the first music synthesizer capable of recreating the grand piano and other orchestral instruments. His book, The Singularity Is Near, was a New York Times best seller. and is considered one of the best books about futurism and transhumanism ever written. Mr. Kurzweil was hired by Google in December as Director of Engineering to "work on new projects involving machine learning and language processing." He has agreed to take a short break from creating and predicting the future in order to answer your questions. As usual, you're invited to ask as many questions as you'd like, but please divide them, one question per post.
MarkWhittington writes "With two private companies, Planetary Resources and Deep Space Industries, proposing to set up asteroid mining, the prospect of accessing limitless wealth beyond the Earth has caused a bit of media speculation about what that could mean. The question arises, could asteroid resources be used to create the greatest dreams — and perhaps the worst nightmares — of science fiction?"
Iranian state TV is claiming that the country has successfully sent a monkey into space and back, bringing Iran one step closer to its goal of a manned space flight. According to the report, the rocket named Pishgam, or Pioneer in Farsi, reached a height of 120km. From the article: "Iran has long said it seeks to send an astronaut into space as part of its ambitious aerospace program, including plans for a new space center announced last year. In 2010, Iran said it launched an Explorer rocket into space carrying a mouse, a turtle and worms."
jjp9999 writes "Recent findings published on Jan. 27 in the journal Nature Neuroscience may inspire you to get some proper sleep. Researchers at UC Berkeley found that REM sleep plays a key role in moving short term memories from the hippocampus (where short-term memories are stored) to the prefrontal cortex (where long-term memories are stored), and that degeneration of the frontal lobe as we grow older may play a key role in forgetfulness. 'What we have discovered is a dysfunctional pathway that helps explain the relationship between brain deterioration, sleep disruption and memory loss as we get older – and with that, a potentially new treatment avenue,' said UC Berkeley sleep researcher Matthew Walker."
Living in dense cities makes for certain efficiencies: being able to walk or take mass transit to work, living in buildings with (at least potentially) efficient HVAC systems, and more. That's why cities have been lauded in recent years for their (relatively) low environmental impact. But it seems at least one aspect of city life has an environmental effect felt at extreme distances from the cities themselves: waste heat. All those tightly packed sources of heat, from cars to banks of AC units, result in temperature changes not just directly (and locally) but by affecting weather systems surrounding the source city. From the article: "The released heat is changing temperatures in areas more than 1,000 miles away (1609 kilometers). It is warming parts of North America by about 1 degree Fahrenheit (0.6 degrees Celsius) and northern Asia by as much as 1.8 degrees Fahrenheit (1 degree Celsius), while cooling areas of Europe by a similar amount, scientists report in the journal Nature Climate Change. The released heat (dubbed waste heat), it seems, is changing atmospheric circulation, including jet streams — powerful narrow currents of wind that blow from west to east and north to south in the upper atmosphere. This impact on regional temperatures may explain a climate puzzle of sorts: why some areas are having warmer winters than predicted by climate models, the researchers said. In turn, the results suggest this phenomenon should be accounted for in models forecasting global warming."
Numerous news outlets are reporting the findings of a study from the Research Council of Norway — a government agency — which concludes that (in Bloomberg's version) "After the planet's average surface temperature rose through the 1990s, the increase has almost leveled off at the level of 2000, while ocean water temperature has also stabilized." The New York Times' Dot Earth blog offers some reasons to be skeptical of the findings.
An anonymous reader writes "Microsoft Research and UN scientists have teamed up to build the first general-purpose computer model of whole ecosystems across the entire world. The project was detailed in a recent Nature article [note: yet another expensively paywalled original article] titled 'Ecosystems: Time to model all life on Earth.'"
sciencehabit writes with this excerpt from Science magazine's colorful synopsis of a paywalled article at Current Biology "A day in the life of a male dung beetle goes something like this: Fly to a heap of dung, sculpt a clump of it into a large ball, then roll the ball away from the pile as fast as possible. However, it turns out that the beetles, who work at night, need some sort of compass to prevent them from rolling around in circles. New research suggests that the insects use starlight to guide their way. Birds, seals, and humans also use starlight to navigate, but this is the first time it's been shown in an insect." Also on the topic of How Animals Get Around Without GPS, new research has considerably heightened scientists understanding of birds' sensitivity to magnetic fields. For homing pigeons at least, this ability seems to be tied to a cluster of just 53 neurons (original paper, also behind a paywall).
sciencehabit writes "A purported conflict between the century-old theory of classical electrodynamics and Einstein's theory of special relativity doesn't exist, a chorus of physicists says. Last April, an electrical engineer claimed that the equation that determines the force exerted on an electrically charged particle by electric and magnetic fields — the Lorentz force law — clashes with relativity, the theory that centers on how observers moving at a constant speed relative to one another will view the same events. To prove it, he concocted a simple 'thought experiment' in which the Lorentz force law seemed to lead to a paradox. Now, four physicists independently say that they have resolved the paradox."
MikeChino writes "Instructables member Patrik has successfully transformed an old HP5150 inkjet printer into a DIY bioprinter. To do this he removed the plastic covers and panels and rewired the paper handling mechanism. Then he prepped ink cartridges to be able to handle biological materials by opening the lid, removing the ink, and washing it out with deionized water. For his first experiment, he printed a simple solution of arabinose onto filter paper."
ananyo writes "The proton, a fundamental constituent of the atomic nucleus, seems to be smaller than was previously thought. And despite three years of careful analysis and reanalysis of numerous experiments, nobody can figure out why. An new experiment published in Science only deepens the mystery. The proton's problems started in 2010, when research using hydrogen made with muons seemed to show that the particle was 4% smaller than originally thought. The measurement, published in Nature, differed from those obtained by two other methods by 4%, or 0.03 femtometers. That's a tiny amount but is still significantly larger than the error bars on either of the other measurements. The latest experiment also used muonic hydrogen, but probed a different set of energy levels in the atom. It yielded the same result as the Nature paper — a proton radius of 0.84 fm — but is still in disagreement with the earlier two measurements. So what's the problem? There could be a problem with the models used to estimate the proton size from the measurements, but so far, none has been identified. The unlikely but tantalizing alternative is that this is a hint of new physics."
Lasrick writes "The Guardian has an exclusive story regarding a secret uranium-enriching plant in the UK that was closed due to safety fears. From the article: 'A top-secret plant at Aldermaston that makes enriched uranium components for Britain's nuclear warheads and fuel for the Royal Navy's submarines has been shut down because corrosion has been discovered in its 'structural steelwork', the Guardian can reveal. The closure has been endorsed by safety regulators who feared the building did not conform to the appropriate standards. The nuclear safety watchdog demands that such critical buildings are capable of withstanding 'extreme weather and seismic events,' and the plant at Aldermaston failed this test. It has set a deadline of the end of the year for the problems to be fixed.'"
An anonymous reader points out that 9 years ago the Opportunity rover started to explore the red planet. "The older, smaller cousin of NASA's huge Mars rover Curiosity is quietly celebrating a big milestone Thursday — nine years on the surface of the Red Planet. NASA's Opportunity rover landed on Mars the night of Jan. 24, 2004 PST (just after midnight EST on Jan. 25), three weeks after its twin, Spirit, touched down. Spirit stopped operating in 2010, but Opportunity is still going strong, helping scientists better understand the Red Planet's wetter, warmer past."
John "Jack" R. Horner is the Curator of Paleontology at the Museum of the Rockies, adjunct curator at the National Museum of Natural History, and one of the most famous paleontologists in the world. Known in the scientific community for his research on dinosaur growth and whether or not some species lived in social groups, he is most famous for his work on Jurassic Park and being the inspiration for the character of Alan Grant. Horner caused quite a stir with the publication of his book, How to Build a Dinosaur: Extinction Doesn't Have to Be Forever, in which he proposes creating a "chickensaurus" by genetically "nudging" the DNA of a chicken. Jack has agreed to step away from the genetics lab and put down the bones in order to answer your questions. As usual, you're invited to ask as many questions as you'd like, but please divide them, one question per post.
giminy writes "Clay Shirky has a thought-provoking piece on depression in the hacker community. While hackers tend to be great at internet collaboration on software projects, we often fall short when it comes to helping each other with personal problems. The evidence is only anecdotal, but there seems to be a higher than average incidence of mental health issues among hackers and internet freedom fighters. It would be great to see this addressed by our community through some outreach and awareness programs."
sciencehabit writes "In a new study, researchers find that a single number that describes the complexity of feather patterns on bird chests, a parameter called the fractal dimension, is linked to whether a bird has a strong immune system or is malnourished. When scientists restricted the food of red-legged partridges, the patterns on their chests had a lower fractal dimension than those sported by their well-fed colleagues. The food-restricted birds, on average, weighed 13% less than their well-fed colleagues and had weaker immune systems, which makes fractal dimension an easily recognizable sign of a potential mate's health and vitality, the researchers contend."
skade88 writes "NPR is reporting on a study in which the author claims to have found the formula to predict the average life span of members of a species. It does not apply to specific individuals of that species, only to the average life span of members of the species as a whole. From the article: 'It's hard to believe that creatures as different as jellyfish and cheetahs, daisies and bats, are governed by the same mathematical logic, but size seems to predict lifespan. The formula seems to be nature's way to preserve larger creatures who need time to grow and prosper, and it not only operates in all living things, but even in the cells of living things. It tells animals for example, that there's a universal limit to life, that though they come in different sizes, they have roughly a billion and a half heart beats; elephant hearts beat slowly, hummingbird hearts beat fast, but when your count is up, you are over.'"
MatthewVD writes "Infrared cameras on satellites and night vision goggles could soon use lasers to cool their components. According to the study published in Nature, researchers in Singapore were able to cool the semiconductor cadmium sulfide from 62 degrees fahrenheit to -9 degrees by focusing a green laser on it and making it fluoresce and lose energy as light. Since they require neither gas nor moving parts, they can be more compact, free from vibration and not prone to mechanical failure."
Zothecula writes "NASA and the Canadian Space Agency (CSA) have begun practicing satellite refueling in space on a test bed outside the International Space Station (ISS). In a series of tests that started on January 14 and are scheduled to continue until the 25th, the two space agencies are using the Robotic Refueling Module (RRM) and Canada's Special Purpose Dexterous Manipulator, or Dextre, robot to carry out simulated refueling operations. The purpose of these tests is to develop refueling methods aimed at extending the life of satellites and reducing the amount of space debris orbiting the Earth."
angry tapir writes "An international team of astronomers has used the CSIRO-run Australia Telescope Compact Array to measure the cooling of the universe since the Big Bang. According to the CSIRO, it is the most accurate reading yet of how hot the universe used to be. When the universe was half its current age its temperature was -267.92 degrees Celsius (5.08 Kelvin), the team found, which is warmer than today's universe (-270.27 degrees Celsius)."
sciencehabit writes "Male scientists — especially at the upper echelons of the profession — are far more likely than women to commit misconduct. That's the bottom line of a new analysis by three microbiologists of wrongdoing in the life sciences in the United States. Ferric Fang of the University of Washington, Seattle; Joan Bennett of Rutgers University; and Arturo Casadevall of Albert Einstein College of Medicine combed through misconduct reports on 228 people released by the U.S. Office of Research Integrity (ORI) over the last 19 years. They then compared the gender balance — or imbalance, in this case — against the mix of male and female senior scientists and trainees to gauge whether misconduct was more prevalent among men. A remarkable 88% of faculty members who committed misconduct were men, or 63 out of 72 individuals. The number of women in that group was one-third of what one would expect based on female representation in the life sciences."
SternisheFan sends news of researchers who encoded an MP3, a PDF, a JPG, and a TXT file into DNA, along with another file that explains the encoding. The researchers estimate the storage density of this technique at 2.2 petabytes per gram (abstract). "We knew we needed to make a code using only short strings of DNA, and to do it in such a way that creating a run of the same letter would be impossible. So we figured, let's break up the code into lots of overlapping fragments going in both directions, with indexing information showing where each fragment belongs in the overall code, and make a coding scheme that doesn't allow repeats. That way, you would have to have the same error on four different fragments for it to fail – and that would be very rare," said one of the study's authors. "We've created a code that's error tolerant using a molecular form we know will last in the right conditions for 10 000 years, or possibly longer," said another.
astroengine writes "Scientists have long puzzled over why the surface of the sun is cooler than its corona, the outer hazy atmosphere visible during a solar eclipse. Now, thanks to a five-minute observation by a small, but very high-resolution ultraviolet telescope, they have some answers. Hi-C, which was launched aboard a suborbital rocket to study the sun without interference from Earth's atmosphere, revealed interwoven magnetic fields braided like hair. When the braids relaxed, they released energy, heating the corona (abstract). 'I had no idea we would see structures like that in the corona. Seeing these braids was very new to me,' astrophysicist Jonathan Cirtain with NASA's Marshall Space Flight Center in Huntsville, Ala., told Discovery News."
Jeremiah Cornelius writes "Researchers with the European Food Safety Authority discovered variants of the Cauliflower mosaic virus 35S in the most widely harvested varieties of genetically-modified crops, including Monsanto's RoundupReady Soy and Maze. According to the researchers, Podevin and du Jardin, the particular 'Gene VI' is responsible for a number of possible consequences that could affect human health, including inhibition of RNA silencing and production of proteins with known toxicity. The EFSA is endorsing 'retrospective risk assessment' of CaMV promoter and its Gene VI sequences — in an attempt to give it a clean bill of health. It is unknown if the presence of the hidden viral genes were the result of laboratory contamination or a possible recombinant product of the resultant organism. There are serious implications for the production of GMO for foodstuffs, given either possibility."
coondoggie writes "A new company intends by 2015 to send a fleet of tiny satellites to mine passing asteroids for high-value metals. Deep Space Industries Inc.'s asteroid mining proposal begins in 2015, when the company plans to send out a squadron of 55lb cubesats, called Fireflies, that will explore near-Earth space for two to six months looking for target asteroids. The company's CEO said, 'Using resources harvested in space is the only way to afford permanent space development. More than 900 new asteroids that pass near Earth are discovered every year. They can be like the Iron Range of Minnesota was for the Detroit car industry last century — a key resource located near where it was needed. In this case, metals and fuel from asteroids can expand the in-space industries of this century. That is our strategy.'"
MTorrice writes "About 320,000 soldiers returning from the wars in Afghanistan and Iraq have struggled with neurological problems associated with traumatic brain injury, according to the Rand Corporation. Some veterans experience symptoms, such as memory loss and anxiety, without noticeable physical signs of brain injury. Now researchers report a possible chemical signature: Levels of a certain lipid spike in the brains of mice exposed to mild explosions (abstract; full article paywalled). This lipid could serve as a way to diagnose people who are at risk of developing neurological disorders after a blast, the scientists say."
An anonymous reader writes "Radical Islamist hackers have been harassing Egyptologist Kate Phizackerley's online journal Egyptological and her blog KV64. Phizackerley and her team finally got tired of it and shut their online work down. As blogger Roger Pearse says, 'A bunch of violent scumbags... who never have contributed in any way to the web, have successfully interfered with the scientific effort of the entire human race... Next year there will be more.' How do we route around damage like this?"
carmendrahl writes "A science historian has collaborated with a publisher to digitize a one-of-a kind collection of chemists' signatures. In the shadow of World War II, a Japanese chemist named Tetsuo Nozoe traveled outside his land for the first time, and collected autographs from the people he met on the way. This turned into a forty year hobby, and a 1200-page collection. The digital collection sucks chemists in for hours — it's full of cartoons, jokes, haikus, and scribbles the signers admit to having scrawled 'in a drunken state.' Nobel Prizewinners and ordinary chemists signed side-by-side. The Nozoe notebook collection will be open access for at least three years, with a big goal being to identify all the 'mystery' signatures in the collection with help from readers."
ananyo writes "Scrounging chemicals and equipment in their spare time, a team of chemistry bloggers is trying to replicate published protocols for making molecules. The researchers want to check how easy it is to repeat the recipes that scientists report in papers — and are inviting fellow chemists to join them. Blogger See Arr Oh, chemistry graduate student Matt Katcher from Princeton, New Jersey, and two bloggers called Organometallica and BRSM, have together launched Blog Syn, in which they report their progress online. Among the frustrations that led the team to set up Blog Syn are claims that reactions yield products in greater amounts than seems reasonable, and scanty detail about specific conditions in which to run reactions. In some cases, reactions are reported which seem too good to be true — such as a 2009 paper which was corrected within 24 hours by web-savvy chemists live-blogging the experiment; an episode which partially inspired Blog Syn. According to chemist Peter Scott of the University of Warwick in Coventry, UK, synthetic chemists spend most of their time getting published reactions to work. 'That is the elephant in the room of synthetic chemistry.'"
lukej writes "Over eleven years ago, the possibility of using the retired Homestake Mine as an underground science laboratory was first proposed. Today the local newspaper gives a science-filled tour of that facility, along with a short photo tour, and decent descriptions of some of the experiments it hosts (Majorana, LUX, Long Baseline Neutrino Experiment). Some fairly interesting deep, dirty, and real physical science!"
The Bad Astronomer writes "Studies of carbon-14 in Japanese trees and beryllium-10 in Antarctic ice indicate the Earth was hit by a big radiation blast in 775 AD. Although very rare, occurring only once every million years or so, the most likely culprit is a gamma-ray burst, a cosmic explosion accompanying the birth of a black hole. While a big solar flare is still in the running, a GRB from merging neutron stars produces the ratio of carbon and beryllium observed, and also can explain why no bright explosion was seen at the time, and no supernova remnant is seen now."
Zothecula writes "Scientists based at Empa, the Swiss Federal Laboratories for Materials Science and Technology, have set a new efficiency record for thin-film copper indium gallium (di)selenid (or CIGS) based solar cells on flexible polymer foils, reaching an efficiency of 20.4 percent. This is an increase from a previous record of 18.7 percent set by the team back in 2011."
SternisheFan notes that scientists at Cambridge University have found four-stranded DNA in human cells for the first time. "If you've ever studied genetics in school or college, you'll know that the structure of DNA is a double helix. You likely know that DNA carries all of our genetic code. While traditionally we think of only double helix DNA, scientists from Cambridge University in England have made an interesting discovery. According to the researchers, a quadruple helix is also present in some cells and is believed to relate to cancer in some ways. According to the researchers, controlling these quadruple helix structures could provide new ways to fight cancer. The scientists believe the quadruple helix may form when the cell has a certain genotype or operates in a certain dysfunctional state. Scientists have been able to produce quadruple helix material in test tubes for years. The material produced is called the G-quadruplex. The G refers to guanine, which is one of the base pairs that hold DNA together. The new research performed at the University is believed to be the first to firmly pinpoint quadruple helix in human cells."
riverat1 writes "The Berkeley Earth Surface Temperature studies latest release finds that land surface temperature changes since 1750 are nearly completely explained by increases in greenhouse gases and large volcanic eruptions. They also said that including solar forcing did not significantly improve the fit. Unlike the other major temperature records BEST used nearly all available temperature records instead of just a representative sample. Yet to come is an analysis that includes ocean temperatures."
hypnosec writes "Stephen Hawking's ability to communicate has been deteriorating over the years and as it stands, he is only able to communicate at the rate of 1 word per minute. Intel CTO Justin Rattner has revealed that they are working on an interface that will boost the scientist's speech to up to 10 words per minute. Beyond twitching his cheek, Hawking is also capable of other voluntary facial expressions which can be tapped to achieve faster communications with the help of a better character interface and a better word predictor."
dgharmon writes in with an interesting article about how much (or how little) beef is in a UK burger. "The presence of horsemeat in value beefburgers has caused a furore. But what is usually in the patties? It has been a sobering week for fans of the beefburger. Tesco have used full-page adverts in national newspapers to apologize for selling burgers in the UK that were found to contain 29% horsemeat. Traces of horse DNA were also detected by the Food Standards Agency of Ireland in products sold by Iceland, Lidl, Aldi and Dunnes. But a beefburger rarely contains 100% beef."
First time accepted submitter ggrocca writes "Using human mucus as a testbed for how well influenza virus thrives in different humidity conditions, researchers at Virginia Tech found that the virus survived best if humidity is below 50%, a typical indoor situation during the winter in temperate climates due to artificial heating. The virus begins to find itself at home again only when humidity reaches almost 100%. Unsurprisingly, the latter finding explains flu spikes during rainy season in tropical climates. Full paper on PLOS ONE."
MightyMartian writes "NASA scientists say Cassini has discovered that far fewer craters are visible on Titan than on the other moons of Saturn. The craters they have discovered are far shallower than other moons' craters and appear to be filling with hydrocarbon sand. On top of being another reason Titan's active geology is very cool, it adds to the mystery of where all the methane on Titan is coming from. 'The rain that falls from Titan's skies is not water, but contains liquid methane and ethane, compounds that are gases at Earth's temperatures. ... The source of Titan's methane remains a mystery because methane in the atmosphere is broken down over relatively short time scales by sunlight. Fragments of methane molecules then recombine into more complex hydrocarbons in the upper atmosphere, forming a thick, orange smog that hides the surface from view. Some of the larger particles eventually rain out onto the surface, where they appear to get bound together to form the sand.'"
theodp writes "Harvard geneticist George Church recently told Der Spiegel he's close to developing the necessary technology to clone a Neanderthal, at which point all he'd need is an 'adventurous human woman' to be a surrogate mother for the first Neanderthal baby to be born in 30,000 years (article in German, translation to English). Church said, 'We have lots of Neanderthal parts around the lab. We are creating Neanderthal cells. Let's say someone has a healthy, normal Neanderthal baby. Well, then, everyone will want to have a Neanderthal kid. Were they superstrong or supersmart? Who knows? But there's one way to find out.'"
New submitter EngnrFrmrlyKnownAsAC writes "Communicating with lasers has become the hot new thing. While most researchers are seeking faster throughput, NASA set its sights in a different direction: the moon. They recently announced the first successful one-way laser communication 'at planetary distances.' What did they send? An image of the Mona Lisa, of course. 'Precise timing was the key to transmitting the image. Sun and colleagues divided the Mona Lisa image into an array of 152 pixels by 200 pixels. Every pixel was converted into a shade of gray, represented by a number between zero and 4,095. Each pixel was transmitted by a laser pulse, with the pulse being fired in one of 4,096 possible time slots during a brief time window allotted for laser tracking. The complete image was transmitted at a data rate of about 300 bits per second.'"