An anonymous reader writes "Early humans were able to move from Africa after a single genetic mutation allowed them to become vegetarians, scientists claim. The switch, which allowed humans to process vegetables, meant that humans were able to move away from water sources and spread across the continent. A team of geneticists compared DNA sequences from a variety of people around the world to see how different populations relate to one another and when they have gone their separate ways. The scientists found that a key genetic variant gave humans the ability to convert fats from plants into essential nutrients for the brain."

MassDosage writes "I've always found Chemistry interesting, particularly in high school when I had the good fortune of having a Chemistry teacher who was not only really good looking, but a great teacher too. I studied it for a year at University and then moved on and haven't really given the periodic table and its elements much thought since. This changed when the Wonderful Life with the Elements was delivered to me two weeks ago. It's one of those books that aims to make science fun and, unlike many other attempts which turn out to be pretty lame, this actually succeeds in presenting the periodic table in a fresh, original and interesting manner." Read on for the rest of Mass Dosage's review.

ananyo writes "Vesta, the second-most-massive body in the asteroid belt, was thought to be bone dry. But NASA's Dawn spacecraft has found evidence that smaller, water-rich asteroids once implanted themselves in Vesta's surface. The water stays locked up in hydrated minerals until subsequent impacts create enough heat to melt the rock and release the water as a gas, leaving pitted vents in the surface. The discovery shows that yet another body in the inner Solar System has a water cycle."

Hugh Pickens writes "Joseph Walker writes at the WSJ that although personality tests have a long history in hiring, sophisticated software has now made it possible to evaluate more candidates, amass more data and peer more deeply into applicants' personal lives and interests. This allows employers to predict specific outcomes, such as whether a prospective hire will quit too soon, file disability claims, or steal. For example after a half-year trial that cut attrition by a fifth, Xerox now leaves all hiring for its 48,700 call-center jobs to software. Xerox used to pay lots of attention to applicants who had done the job before. Then, an algorithm told the company that experience doesn't matter. It determined what does matter in a good call-center worker — one who won't quit before the company recoups its $5,000 investment in training. By putting applicants through a battery of tests and then tracking their job performance, Evolv has developed a model for the ideal call-center worker (PDF). The data recommend a person who lives near the job, has reliable transportation and uses one or more social networks, but not more than four. He or she tends not to be overly inquisitive or empathetic, but is creative. 'Some of the assumptions we had weren't valid,' says Connie Harvey, Xerox's chief operating officer of commercial services. However, data-based hiring can expose companies to legal risk. Practices that even unintentionally filter out older or minority applicants can be illegal under federal equal opportunity laws. If a hiring practice is challenged in court as discriminatory, a company must show the criteria it is using are proven to predict success in the job."

Plammox writes "As Copenhagen Suborbitals continue to develop their donation-based, garage-level technology solution to manned suborbital spaceflight, they're looking to crowdfund the next space capsule design. For a mere $25, your name will fly in the next capsule test launch. $2000 will buy you a guided tour of the premises in Copenhagen. The volunteer-based organization has previously done a number of different static engine tests with spectators, and two sea launches of a launch escape system and their first big rocket."

Freshly Exhumed writes "Drawing on new data released Wednesday by the National Snow and Ice Data Center that the Arctic ice pack has melted to an all time low within the satellite record (video), NASA climate scientist James Hansen has declared the current reality a 'planetary emergency.' As pointed out by Prof. David Barber from the University of Manitoba, 'The thaw this year broke all the records that we had previous to this and it didn't just break them, it smashed them.' So, not sure why your mainstream press isn't covering this story? 'It's hard for the public to realize,' Hansen said, 'because they stick their head out the window and don't see much going on.' Thankfully, some people are noticing, as Bill McKibben's recent Rolling Stone article, Global Warming's Terrifying New Math has gone viral."

scibri writes "Your moral positions may be more flexible than you think. Researchers in Sweden have tricked people into reversing their opinions on moral issues, even to the point of constructing good arguments to support the opposite of their original positions (paper in PLOS ONE). They used a 'magic trick' to reverse a person's responses to such moral issues as 'Large-scale governmental surveillance of e-mail and Internet traffic ought to be forbidden as a means to combat international crime and terrorism,' by switching 'forbidden' to 'permitted' when the subject turned the page of the questionaire. When asked to read back the questions and answers, about half of the subjects did not detect the changes, and a full 53% of participants argued unequivocally for the opposite of their original attitude in at least one of the manipulated statements."

alphadogg writes "The Ig Nobel Prize ceremony has honored a wide array of strange research and advancement over the years, from exploding pants to woodpecker headaches to aggressive parking enforcement, and Thursday night's ceremony in Cambridge, Mass., was no exception. Particular highlights included a Russian company that turns ammunition into trace amounts of diamond, Japanese engineers who developed a speech jamming device, and research into such critical topics as why coffee is so hard to carry without slopping and what makes a ponytail move the way it does."

First time accepted submitter amkkhan writes "One lucky space-lover with some extra cash could become the proud new owner of the largest moon rock ever to be auctioned, according to the auction house Heritage Auctions. The moon rock, known as Dar al Gani 1058, is part of a lunar meteorite that was found on Earth in 1988 and is expected to fetch as much as $380,000 at auction."

SchrodingerZ writes "The nuclear power station on Three Mile Island in Pennsylvania shut down abruptly this afternoon. Its shutdown was caused when one of four coolant pumps for a reactor failed to work. 'The Unit 1 reactor shut off automatically about 2:20 p.m., the plant's owner, Exelon Corporation, reported. There is no danger to the public, but the release of steam in the process created "a loud noise heard by nearby residents," the company said.' If radiation was released into the environment, it is so low that it thus far has not been detected. The plant is a 825-megawatt pressurized water reactor, supplying power to around 800,000 homes, thought there has been no loss of electrical service. Three Mile Island was the site of a partial nuclear meltdown in 1979. The Unit 2 reactor has not been reactivated since."

pigrabbitbear writes "Is bottled beer nuclear bombproof? The United States government conducted a couple tests in the 1950s to find out—it exploded nuclear bombs with 'packaged commercial beverages' deposited at varying distances from the blast center to see if beer and soda would be safe to drink afterwards. The finding? Yep, surviving bottled and canned drinks can be consumed in the event of a nuclear holocaust, without major health risks."

RocketAcademy writes "Virgin Galactic's SpaceShip Two is in the final stages of preparation for powered flight. The suborbital spacecraft, built by Scaled Composites, has successfully completed airspeed, angle-of-attack, center-of-gravity, and structural tests during unpowered glide flights. It is now on track for powered glide flights by the end of this year. Meanwhile, in the hangar next door, XCOR Aerospace continues to work on the Lynx spacecraft, expected to begin powered flight tests early next year. Some exclusive photos provide a sneak peak at things to come." Also to watch for in the world of private space launches, next month (possibly as early as the 8th), SpaceX has another launch scheduled to reach the ISS.

cripkd writes "The 3rd pillar from the ELI program was given the go ahead Tuesday: 'In Romania, Magurele, the ELI pillar will focus on laser-based nuclear physics. For this purpose, an intense gamma-ray source is foreseen by coupling a high-energy particle accelerator to a high-power laser.' Here are some specs and details about why this is not your regular key-chain laser."

angry tapir writes "Researchers at the University of New South Wales in Australia have created the world's first working quantum bit based on a single atom in silicon. The research team was able to both read and write information using the spin, or magnetic orientation, of an electron bound to a single phosphorous atom embedded in a silicon chip. In February, UNSW researchers revealed they had successfully created a single-atom transistor using a single phosphorous atom in a silicon crystal."

mtcups writes "I am a musician/IT guy whose hearing has suffered from VERY LOUD guitar players, (yes I do use earplugs now, but too late), and am faced with the outrageously priced hearing aids $4.5K+/pair and was appalled at their lack of integration with smart phones. It seems obvious to me that I should be able to control the hearing aids via a smart phone interface so I can shape the profile for different environments, and also control features like 'hearing loops' and Bluetooth connections. I have done some research, but my guess is that the hearing aid companies want proprietary systems and don't want a smartphone interface since they would loose control and it would allow for competition for cheaper & better programs. I am not convinced that a combination of good ear-buds, good microphone(s), and a smartphone interface couldn't totally replace these overpriced solutions."

ananyo writes "A new material has broken the record for converting heat into electricity. The material had a conversion efficiency of about 15% — double that of one of the most well-known thermoelectrics: lead telluride (abstract). For decades, physicists have toyed with ways to convert heat into electricity directly. Materials known as thermoelectrics use temperature differences to drive electrons from one end to another. The displaced electrons create a voltage that can in turn be used to power other things, much like a battery. Such materials have found niche applications: the Curiosity rover trundling about on the surface of Mars, for example, uses thermoelectrics to turn heat from its plutonium power source into electricity. That doesn't mean that the material is ready to be used on the next Mars rover, however: NASA has been looking at similar materials for future space missions, but the agency is not yet convinced that they are ready for primetime."

DevotedSkeptic sends this excerpt about research that found a correlation between the use of a common food-packaging chemical and obesity rates. "Since the 1960s, manufacturers have widely used the chemical bisphenol-A (BPA) in plastics and food packaging. Only recently, though, have scientists begun thoroughly looking into how the compound might affect human health—and what they've found has been a cause for concern. Starting in 2006, a series of studies, mostly in mice, indicated that the chemical might act as an endocrine disruptor (by mimicking the hormone estrogen), cause problems during development and potentially affect the reproductive system, reducing fertility. After a 2010 Food and Drug Administration report warned that the compound could pose an especially hazardous risk for fetuses, infants and young children, BPA-free water bottles and food containers started flying off the shelves. In July, the FDA banned the use of BPA in baby bottles and sippy cups, but the chemical is still present in aluminum cans, containers of baby formula and other packaging materials. Now comes another piece of data on a potential risk from BPA but in an area of health in which it has largely been overlooked: obesity. A study by researchers from New York University, published today in the Journal of the American Medical Association, looked at a sample of nearly 3,000 children and teens across the country and found a 'significant' link between the amount of BPA in their urine and the prevalence of obesity."

RocketAcademy writes "British billionaire Richard Branson, whose Virgin Galactic company is backing the development of SpaceShip Two, has told CBS News he is 'determined to start a population on Mars.' He said, 'I think over the next 20 years, we will take literally hundreds of thousands of people to space and that will give us the financial resources to do even bigger things. That will give us the resources then to put satellites into space at a fraction of the price, which can be incredibly useful for thousands of different reasons.' Branson isn't the only billionaire interested in the Red Planet. Elon Musk, founder of Space Exploration Technologies (SpaceX), wants to put humans on Mars in the next 12 to 15 years."

New submitter spirito writes with this snippet about rats fed Roundup laced water: "The first animal feeding trial studying the lifetime effects of exposure to Roundup tolerant GM maize, and Roundup, the world's best-selling weedkiller, shows that levels currently considered safe can cause tumors and multiple organ damage and lead to premature death in laboratory rats, according to research published online today by the scientific journal Food and Chemical Toxicology. ... Three groups were given Roundup in their drinking water, at three different levels consistent with exposure through the food chain from crops sprayed with the weedkiller: the mid level corresponded to the maximum level permitted in the US in some GM feed; the lowest corresponded to contamination found in some tap waters. Three groups were fed diets which contained different proportions of NK603 – 11%, 22% and 33%. Three groups were given both Roundup and NK603 at the same three dosages. The final control group was fed an equivalent diet with no Roundup or NK603 but containing 33% of equivalent non-GM maize." The Chicago Tribune reports that not everyone's convinced of the results: "Experts not involved in the study were highly skeptical about its methods and findings, with some accusing the French scientists of going on a 'statistical fishing trip.'"

When you think of garage-based tech start-ups, hardware makers like Apple or data-manipulators like Google probably spring to mind before biotech, and way before farming. Lewis Weil, though, has for the last several years been perfecting the art of growing seaweed in central Texas, and his Austin Sea Veggies have garnered interest from gourmets and restaurants across the U.S. In large part, that's because seaweed is so useful for industrial purposes, it's getting harder to find eating seaweed these days. Lewis says there's nothing stopping anyone with an interest in aquaculture in emulating his success as an inland ocean farmer, but has some cautions, too -- when small things go wrong, or a record heatwave overcomes humans' puny air conditioning systems, your seaweed harvest can fail just like any other crop. Update: 09/19 16:40 GMT by T : Now with transcript! If video's too slow and linear, click below to read what Lewis had to say.