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DNA Reveals History of Vanished "Paleo-Eskimos"

samzenpus posted 11 hours ago | from the back-in-the-day dept.

Earth 46

An anonymous reader writes The earliest people in the North American Arctic remained isolated from others in the region for over 4,000 years before vanishing around 700 years ago, new analysis shows. The study also reveals that today's Inuit and Native Americans of the Arctic are genetically distinct from the region's first settlers. "A single founding population settled, and endured the harsh environmental conditions of the Arctic, for almost 5,000 years — during which time the culture and lifestyle changed enough to be represented as distinct cultural units," explained Dr Maanasa Raghavan, first author of the new paper.

Feynman Lectures Released Free Online

samzenpus posted yesterday | from the watch-and-learn dept.

Education 61

Anna Merikin writes In 1964, Richard Feynman delivered a series of seven hour-long lectures at Cornell University which were recorded by the BBC, and in 2009 (with a little help from Bill Gates), were released to the public. The three-volume set may be the most popular collection of physics books ever written, and now the complete online edition has been made available in HTML 5 through a collaboration between Caltech (where Feyman first delivered these talks, in the early 1960s) and The Feynman Lectures Website. The online edition is "high quality up-to-date copy of Feynman's legendary lectures," and, thanks to the implementation of scalable vector graphics, "has been designed for ease of reading on devices of any size or shape; text, figures and equations can all be zoomed without degradation." Volume I deals mainly with mechanics, radiation and heat; Volume II with electromagnetism and matter; and Volume III with quantum mechanics. Last year we told you when Volume I was made available. It's great to see the rest added.

Iceland Raises Volcano Aviation Alert Again

samzenpus posted yesterday | from the every-ash-cloud-has-a-silver-lining dept.

Earth 33

An anonymous reader writes Iceland's authorities have raised an aviation warning for a region close to the Bardarbunga volcano after a small fissure eruption in the area. The eruption began around 0600 GMT prompting the Icelandic Met Office to raise the aviation warning code to red for the Bardarbunga/Holuhraun area, the Department of Civil Protection and Emergency Management said in a statement. The country's meteorological agency described the eruption as a "very calm lava eruption and can hardly be seen on seismometers."

Battle of the Heavy Lift Rockets

Soulskill posted yesterday | from the go-big-or-stay-home dept.

Space 165

schwit1 writes: Check out this detailed and informative look at the unspoken competiton between NASA's SLS rocket and SpaceX's planned heavy lift rocket. It's being designed to be even more powerful than the Falcon Heavy. Key quote: "It is clear SpaceX envisions a rocket far more powerful than even the fully evolved Block 2 SLS – a NASA rocket that isn't set to be launched until the 2030s." The SpaceX rocket hinges on whether the company can successfully build its new Raptor engine. If they do, they will have their heavy lift rocket in the air and functioning far sooner than NASA, and for far less money.

States Allowing Medical Marijuana Have Fewer Painkiller Deaths

Soulskill posted yesterday | from the but-more-dorito-related-injuries dept.

Medicine 197

An anonymous reader writes: Narcotic painkillers aren't one of the biggest killers in the U.S., but overdoses do claim over 15,000 lives per year and send hundreds of thousands to the emergency room. Because of this, it's interesting that a new study (abstract) has found states that allow the use of medical marijuana have seen a dramatic reduction in opioid overdose fatalities. "Previous studies hint at why marijuana use might help reduce reliance on opioid painkillers. Many drugs with abuse potential such as nicotine and opiates, as well as marijuana, pump up the brain's dopamine levels, which can induce feelings of euphoria. The biological reasons that people might use marijuana instead of opioids aren't exactly clear, because marijuana doesn't replace the pain relief of opiates. However, it does seem to distract from the pain by making it less bothersome." This research comes at a time when the country is furiously debating the costs and benefits of marijuana use, and opponents of the idea are paying researchers to paint it in an unfavorable light.

NASA's Competition For Dollars

Soulskill posted yesterday | from the all-about-the-benjamins dept.

NASA 67

An anonymous reader writes: We often decry the state of funding to NASA. Its limited scope has kept us from returning to the moon for over four decades, maintained only a minimal presence in low-Earth orbit, and failed to develop a capable asteroid defense system. But why is funding such a problem? Jason Callahan, who has worked on several of NASA's annual budgets, says it's not just NASA's small percentage of the federal budget that keeps those projects on the back burner, but also competition for funding between different parts of NASA as well. "[NASA's activities include] space science, including aeronautics research (the first A in NASA), technology development, education, center and agency management, construction, maintenance, and the entire human spaceflight program. The total space science budget has rarely exceeded $5 billion, and has averaged just over half that amount. Remember that space science is more than just planetary: astrophysics, heliophysics, and Earth science are all funded in this number. Despite this, space science accounts for an average of 17 percent of NASA's total budget, though it has significant fluctuations. In the 1980s, space science was a mere 11 ½ percent of NASA's budget, but in the 2000s, it made up 27 percent."

Reformatting a Machine 125 Million Miles Away

Soulskill posted 2 days ago | from the red-rover-red-rover-send-updates-right-over dept.

Mars 146

An anonymous reader writes: NASA's Opportunity rover has been rolling around the surface of Mars for over 10 years. It's still performing scientific observations, but the mission team has been dealing with a problem: the rover keeps rebooting. It's happened a dozen times this month, and the process is a bit more involved than rebooting a typical computer. It takes a day or two to get back into operation every time. To try and fix this, the Opportunity team is planning a tricky operation: reformatting the flash memory from 125 million miles away. "Preparations include downloading to Earth all useful data remaining in the flash memory and switching the rover to an operating mode that does not use flash memory. Also, the team is restructuring the rover's communication sessions to use a slower data rate, which may add resilience in case of a reset during these preparations." The team suspects some of the flash memory cells are simply wearing out. The reformat operation is scheduled for some time in September.

Scientists Found the Origin of the Ebola Outbreak

Soulskill posted 2 days ago | from the it-was-the-butler-with-the-candlestick-in-the-library dept.

Medicine 79

Taco Cowboy sends this report from Vox: One of the big mysteries in the Ebola outbreak in West Africa is where the virus came from in the first place — and whether it's changed in any significant ways. ... In a new paper in Science (abstract), researchers reveal that they have sequenced the genomes of Ebola from 78 patients in Sierra Leone who contracted the disease in May and June. Those sequences revealed some 300 mutations specific to this outbreak. Among their findings, the researchers discovered that the current viral strains come from a related strain that left Central Africa within the past ten years. ... Using genetic sequences from current and previous outbreaks, the researchers mapped out a family tree that puts a common ancestor of the recent West African outbreak some place in Central Africa roughly around 2004. This contradicts an earlier hypothesis that the virus had been hanging around West Africa for much longer than that. Researchers are also planning to study the mutations to see if any of them are affecting Ebola's recent behavior. For example, this outbreak has had a higher transmission rate and lower death rate than others, and researchers are curious if any of these mutations are related to that. ... The scientific paper on Ebola is also a sad reminder of the toll that the virus has taken on those working on the front lines. Five of the authors died of Ebola before it was published.

Anti-Ebola Drug ZMapp Makes Clean Sweep: 18 of 18 Monkeys Survive Infection

timothy posted 2 days ago | from the not-that-kind-of-monkey-trial dept.

Biotech 88

Scientific American reports, based on a study published today in Nature, that ZMapp, the drug that has been used to treat seven patients during the current Ebola epidemic in West Africa, can completely protect monkeys against the virus, research has found. ... The drug — a cocktail of three purified immune proteins, or monoclonal antibodies, that target the Ebola virus — has been given to seven people: two US and three African health-care workers, a British nurse and a Spanish priest. The priest and a Liberian health-care worker who got the drug have since died. There is no way to tell whether ZMapp has been effective in the patients who survived, because they received the drug at different times during the course of their disease and received various levels of medical care. NPR also has an interview with study lead Gary Kobinger, who says that (very cautious) human trials are in the works, and emphasizes the difficulites of producing the drug in quantity.

Islamic State "Laptop of Doom" Hints At Plots Including Bubonic Plague

timothy posted 2 days ago | from the theocrat's-cookbook dept.

Biotech 352

Foreign Policy has an in-depth look at the contents of a laptop reportedly seized this year in Syria from a stronghold of the organization now known as the Islamic State, and described as belonging to a Tunisian national ("Muhammed S."). The "hidden documents" folder of the machine, says the report, contained a vast number of documents, including ones describing and justifying biological weapons: The laptop's contents turn out to be a treasure trove of documents that provide ideological justifications for jihadi organizations -- and practical training on how to carry out the Islamic State's deadly campaigns. They include videos of Osama bin Laden, manuals on how to make bombs, instructions for stealing cars, and lessons on how to use disguises in order to avoid getting arrested while traveling from one jihadi hot spot to another. ... The information on the laptop makes clear that its owner is a Tunisian national named Muhammed S. who joined ISIS in Syria and who studied chemistry and physics at two universities in Tunisia's northeast. Even more disturbing is how he planned to use that education: The ISIS laptop contains a 19-page document in Arabic on how to develop biological weapons and how to weaponize the bubonic plague from infected animals. ... "The advantage of biological weapons is that they do not cost a lot of money, while the human casualties can be huge," the document states.

Study: Social Networks Have Negative Effect On Individual Welfare

Soulskill posted 2 days ago | from the tweeting-can-cause-polio dept.

Social Networks 74

An anonymous reader writes: A study of 50,000 people in Italy has found the impact of social networking on individual welfare to be "significantly negative." The researchers found that improvements in self-reported well-being occurred when online networking led to face-to-face interactions, but this effect was overwhelmed by the perceived losses in well-being (PDF) generated by interaction strictly through social networks. The researchers "highlight the role of discrimination and hate speech on social media which they say play a significant role in trust and well-being. Better moderation could significantly improve the well-being of the people who use social networks, they conclude."

Particle Physics To Aid Nuclear Cleanup

Soulskill posted 2 days ago | from the baby-steps-to-a-tricorder dept.

Science 34

mdsolar sends this report from Symmetry Magazine: Cosmic rays can help scientists do something no one else can: safely image the interior of the nuclear reactors at the Fukushima Daiichi plant. ... [M]uon tomography is similar to taking an X-ray, only it uses naturally produced muons. These particles don't damage the imaged materials and, because they already stream through everything on Earth, they can be used to image even the most sensitive objects. Better yet, a huge amount of shielding is needed to stop muons from passing through an object, making it nearly impossible to hide from muon tomography. ... By determining how muons scatter as they interact with electrons and nuclei within the item, the team's software creates a three-dimensional picture of what's inside. ... To prove the technology, the Los Alamos team shipped a demo detector system to a small, working nuclear reactor in a Toshiba facility in Kawasaki, Japan. There, they placed one detector on either side of the reactor core. "When we analyzed our data we discovered that in addition to the fuel in the reactor core, they had put a few fuel bundles off to the side that we didn't know about," says Morris. "They were really impressed that not only could we image the core, but that we also found those bundles."

Magnetic Stimulation Boosts Memory In Humans

Soulskill posted 2 days ago | from the better-learning-through-fridge-magnets dept.

Medicine 72

sciencehabit writes: Our memories are annoyingly glitchy. Names, dates, birthdays, and the locations of car keys fall through the cracks, losses that accelerate at an alarming pace with age and in neurodegenerative diseases. Now, by applying electromagnetic pulses through the skull to carefully targeted brain regions, researchers have found a way to boost memory performance in healthy people. The new study (abstract) sheds light on the neural networks that support memories and may lead to therapies for people with memory deficits, researchers say. Similar studies have been performed using electric current.

Coffee Naps Better For Alertness Than Coffee Or Naps Alone

Soulskill posted 2 days ago | from the meth-naps-still-frowned-upon dept.

Science 124

An anonymous reader writes: Caffeine is a staple of most workplaces — it's rare to find an office without a coffee pot or a fridge full of soda. It's necessary (or at least feels like it's necessary) because many workers have a hard time staying awake while sitting at a desk for hours at a time, and the alternative — naps — aren't usually allowed. But new research shows it might be more efficient for employers to encourage brief "coffee naps," which are more effective at returning people to an alert state than either caffeine or naps alone. A "coffee nap" is when you drink a cup of coffee, and then take a sub-20-minute nap immediately afterward. This works because caffeine takes about 20 minutes to get into your bloodstream, and a 20-minute nap clears adenosine from your brain without putting you into deeper stages of sleep. In multiple studies, tired participants who took coffee naps made fewer mistakes in a driving simulator after they awoke than the people who drank coffee without a nap or slept without ingesting caffeine.

Software Error Caused Soyuz/Galileo Failure

samzenpus posted 3 days ago | from the put-that-anywhere dept.

Space 154

schwit1 writes An investigation into the recent failed Soyuz launch of the EU's Galileo satellites has found that the Russian Fregat upper stage fired correctly, but its software was programmed for the wrong orbit. From the article: "The failure of the European Union’s Galileo satellites to reach their intended orbital position was likely caused by software errors in the Fregat-MT rocket’s upper-stage, Russian newspaper Izvestia reported Thursday. 'The nonstandard operation of the integrated management system was likely caused by an error in the embedded software. As a result, the upper stage received an incorrect flight assignment, and, operating in full accordance with the embedded software, it has delivered the units to the wrong destination,' an unnamed source from Russian space Agency Roscosmos was quoted as saying by the newspaper."

Canada Tops List of Most Science-Literate Countries

timothy posted 3 days ago | from the one-end-of-the-moose-has-more-gravity dept.

Canada 212

An anonymous reader writes "A recent survey of scientific education and attitudes showed the Canadian population to have the highest level of scientific literacy in the world, as well as the fewest reservations about the direction of scientific progress (full report). A key factor is a high level of scientific knowledge among the general population (despite comparatively low numbers of people employed in STEM fields). Another is a higher level of comfort with choosing rationality over religious belief — only 25% of Canadians surveyed agreed with the statement "We depend too much on science and not enough on faith", as opposed to 55% in the U.S. and 38% in the E.U.

I also wonder if the vaunted Canadian healthcare system plays a role. When advances in medical science are something you automatically expect to benefit from personally if you need them, they look a lot better than when you have to scramble just to cover your bills for what we have now."

Drought Inspires a Boom In Pseudoscience, From Rain Machines To 'Water Witches'

timothy posted 3 days ago | from the hi-cousin-barry dept.

Earth 259

merbs (2708203) writes Across drought-stricken California, farmers are desperate for water. Now, many of them are calling dowsers. These "water witches," draped in dubious pseudoscience or self-assembled mythologies—or both—typically use divining rods and some sort of practiced intuition to "find" water. The professional variety do so for a fee. And business is booming. They're just part of a storied tradition of pseudoscientific hucksters exploiting our thirst for water, with everything from cloudbusters to rainmachines to New Age rituals.

No, a Stolen iPod Didn't Brick Ben Eberle's Prosthetic Hand

timothy posted 3 days ago | from the too-bad-to-be-true dept.

The Military 122

New submitter willoremus writes A wounded Army vet had his $75k prosthetic hand bricked when someone stole his iPod Touch? Yeah, not so much. I'm a tech reporter for Slate.com, and a Slashdot post earlier this week prompted me to look into this story and ultimately debunk some of the key info. Sorry for self-posting, but I thought folks here might be interested in the truth since the false story was one of the top posts earlier this week.

Death Valley's Sailing Stones Caught In the Act

timothy posted 3 days ago | from the aliens-did-it dept.

Science 48

Capt.Albatross (1301561) writes "The flat surface of the Racetrack Playa in Death Valley is littered with rocks, some weighing hundreds of kilograms, each at the end of a track indicating that it has somehow slid across the surface. The mechanism behind this has been the subject of much speculation but little evidence, until a trio of scientists caught them in action with cameras and GPS."

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