Wired has a feature on noctilucent clouds, once seen only at high latitudes but increasingly visible now lower down the globe. The clouds result from ice crystals at altitudes of 50 miles, higher than five 9s of the atmosphere. What water ice is doing up there, in a region 100 million times drier than the Sahara desert, is only one of the mysteries associated with the clouds. They are a recent phenomenon: the first scientific description of noctilucent clouds was penned in 1885. For a time it was believed that the clouds were an effect resulting from the eruption of the Krakatoa volcano two years before. Since 2002, the clouds have been sighted — and photographed — as far south as Oregon, Colorado, and Utah. Some scientists believe that human-caused climate change is playing a role, but others doubt this. Two satellites are in orbit to study the clouds; NASA's AIM generated this day-by-day movie of clouds in the vicinity of the North Pole during 2008.

Scrameustache writes "Researcher working on a rare type of aortic abnormality found that the DNA from diseased tissue did not match the DNA from the blood of the same patients So far it's unclear whether these differences in the blood and aortic tissue are the consequence of RNA editing, which changes the messenger RNA but not the gene, or DNA editing, which involves differences in the gene itself. Based on the evidence so far, the researchers believe the differences resulted from developmental rather than somatic DNA alterations. 'Traditionally when we have looked for genetic risk factors for, say, heart disease, we have assumed that the blood will tell us what's happening in the tissue,' lead author Bruce Gottlieb said in a statement. 'It now seems this is simply not the case.'"

jollyreaper writes "Technology moves quickly and what was conventional wisdom last year can be folly this year. But the one thing that's remained constant is hard drives are far too large to backup via conventional means. Tape is expensive and can be unreliable, though it certainly has its proponents. DVDs are just too small. There are prosumer devices like the Drobo, but it's still just a giant box of hard drives, basically RAID. And as we've all had drilled into our heads, 'RAID is not backup.' When last this topic came up on Slashdot, the consensus was that hard drives were the best way to backup hard drives. Backup your internal HDD to an external one, and if your data is really important, have two externals and swap one off-site once a week. Is there any better advice these days?"

_Sharp'r_ writes "In Honduras, according to breaking Catalan newspaper reports (translations available, USA Today mention), authorities have seized 45 computers containing certified election results for a constitutional election that never happened. The election had been scheduled for June 28, but on that day the president, Manuel Zelaya, was ousted. The 'certified' and detailed electronic records of the non-existent election show Zelaya's side having won overwhelmingly."

Not long after Firefox 3.5.1 was released to address a security issue, a new exploit has been found and a proof of concept has been posted. "The vulnerability is a remote stack-based buffer-overflow, triggered by sending an overly long string of Unicode data to the document.write method. If exploited, the resulting overflow could lead to code execution, or if the exploit attempts fail, a denial-of-service scenario." It's recommended that Firefox users disable Javascript until the issue is patched, though add-ons like NoScript should do the trick as well (unless a site on your whitelist becomes compromised).

Update: 07/20 00:09 GMT by KD : An anonymous reader informs us that the Mozilla security blog is indicating that this vulnerability is not exploitable; denial of service is as bad as it gets.

BuzzSkyline writes "The same folks who brought us the tsunami invisibility cloak last year have now come up with an earthquake invisibility cloak. They show that a platform made of just the right configuration of elastic rings could make a structure invisible to earthquakes by effectively steering a quake around the structure. It doesn't work well for compression waves, but the researchers claim it could hide buildings from the slower-moving, more destructive shear earthquake waves. The research is due to be published soon in the journal Physical Review Letters."

Hugh Pickens writes "Discover Magazine reports that although medical simulations have been around for a long time, medical schools like Imperial College London are starting to use virtual hospitals in Second Life so students can learn their way around an O.R. before they enter the real thing. The students can also test their knowledge in the Virtual Respiratory Ward by interviewing patient avatars, ordering tests, diagnosing problems, and recommending treatment. 'The real innovation in SL clinical simulations is that they bring people together in a clinical space — you are standing next to an avatar who is a real patient, and the doctor avatar to your right is a resident at Massachusetts General Hospital and the nurse to your left is at the University of Pennsylvania hospital,' says John Lester, the Education and Healthcare Market Developer at Linden Labs. The most significant benefit of SL training may be the cost. Real-life training facilities require thousands, and sometimes millions of dollars to build and maintain, while SL simulation rooms can be created for minimal costs, and accessed from anywhere in the world for the price of an internet connection. SL can also expose students to situations that a standard academic program can't duplicate: 'You can take risks that aren't safe in the real world and teach more complex subjects in three dimensions,' says Colleen Lin. 'When you're resuscitating a dummy in real life, it looks like a dummy. But you can program an avatar to look like it's choking or having a heart attack, and it looks more real to the student responsible for resuscitating it.'"

suraj.sun sends in this excerpt from CNet: "One of the most recognizable brands in the history of illegal downloading is due to officially resurface, perhaps as early as next week, sources close to the company told CNET News. Only this time the name Kazaa will be part of a legal music service. Altnet and parent company Brilliant Digital Entertainment attached the Kazaa brand to a subscription service that will offer songs and ringtones from all four of the major recording companies. For the past few months, a beta version has been available. The company tried recently to ratchet up expectations with a series of vague, and what some considered misguided, press releases. The site will open with over 1 million tracks." The NYTimes has a related story about how the music industry is trying to convert casual pirates by offering more convenient new services.

JohnMoD writes With the advent of forge.mil, etc. the military seems to be getting on board with free and open source software. A working group meeting is going to be held at Georgia Tech in Atlanta, August 12-13, 2009. There's a pretty good lineup of speakers including a Marine from the Iraq-Marine Expeditionary Forces, who was on the ground and saw the agility open source gave to him and his soldiers. A number of OSS projects are going to be meeting there: Delta 3D, OpenCPI, FalconView, OSSIM, Red Hat, etc. Looks like there will be some good discussions."

MBCook writes "A Danish conservation expert named Rene Larsen has finished a 5-year study of the infamous Vinland Map and declared it genuine. 'All the tests that we have done over the past five years — on the materials and other aspects — do not show any signs of forgery,' he said at the press conference. He and his team studied the ink, the paper, and even insect damage. They believe that the ink, which was discovered in 1972 to contain titanium dioxide and thus supposedly was too new for the map to be genuine, was contaminated when sand was used to dry the ink."

An opinion piece on Gamasutra discusses how, in spite of the fancy new motion control systems that have come to console gaming, the PC's keyboard and mouse setup is still unreplaceable for many titles and genres. Quoting: "With over 100 keys to choose from (back of the box quotation right there), the possibilities are near endless, if you start to think of shift and control functions altering the purpose of keys. It means that, when the developers start to make their game, they don't have to worry about the limitations of the interface, knowing that, if all else fails, they can always assign the compass to K, even if that's a bit of a stretch to all but the pianists. The keyboard is the friend of ambition, and ArmA 2 is the testament to that, in all its surrealist, broken glory. ... It's the same reason RTS games have found a home on the PC for so long, able to use the skills people accumulate moving around windows and clicking on icons to command troops and manipulate their battle lines. Developers taking advantage of what we already know to teach us something we don't is what gaming is all about."

dgun writes "I recently put together a new PC. When I purchased the motherboard, I noticed that it came with an instant-on OS, a small GNU/Linux distro called Splashtop. I assumed that the OS was on a ROM chip on the motherboard. To my great annoyance, when I tried to boot to this OS, a message said that it was not installed. It turns out that motherboard comes with an install disk for this GNU/Linux OS — that you can only run from Windows, to install Splashtop on the hard drive. First of all, doesn't installing it on the hard drive defeat the point of having an instant-on OS? If I wanted to dual-boot a small GNU/Linux OS, there are plenty that I could choose from. Second, if distributing GPL'ed software by means that completely preclude it from being used without Windows is not a violation of the GPL, should it not be?"

webdoodle writes "A new study finds that a change in a single gene has sent two closely related bird populations on their way to becoming two distinct species. The study, published in the August issue of the American Naturalist, is one of only a few to investigate the specific genetic changes that drive two populations toward speciation."

theodp writes "As GE readies appliances that communicate with smart meters in the hope of taking advantage of cheaper electricity rates, CNet asks a big question: Are consumers ready for the smart grid? Right now, most utilities only offer a flat rate, not time-of-use pricing, so the example of a drier that reacts to a 'price signal' about peak rates by keeping one's clothes wet until a more affordable time is pretty much a fantasy. And longer-term, a big question is whether consumers will want to deal with the hassle of optimizing household appliance energy usage themselves, or be willing to relinquish monitoring and control to utility companies — with a concomitant loss of privacy. After all, losing one's copy of 1984 is one thing — losing one's lights and refrigerator is another thing altogether."

FleaPlus writes "From studying past solid rocket launch failures, the 45th Space Wing of the US Air Force has concluded that an early abort (up to a minute after launch) of NASA Marshall Flight Center's Ares I rocket would have a ~100% chance of killing all crew (report summary and link), even if the launch escape system were activated. This would be due to the capsule being surrounded until ground impact by a 3-mile-wide cloud of burning solid propellant fragments, which would melt the parachute. NASA management has stated that their computer models predict a safe outcome. The Air Force has also been hesitant to give launch range approval to the predecessor Ares I-X suborbital rocket, since its solid rocket vibrations are violent enough to disable both its steering and self-destruct module, endangering people on the ground."