A Science News Aggregator That Covers Stories in the World Of Science And Technology.
Wednesday, June 17, 2009
The Future of Energy: A Realist's Roadmap to 2050
From Popsci.com:
Which technologies will finally free us from oil?
This December, when representatives from 170 countries meet at the United Nations climate talks in Copenhagen to replace the expiring Kyoto climate treaty, the smart money predicts unprecedented collaboration. American political change coupled with spiking carbon dioxide levels could inspire a communal project on a scale not seen since World War II. A consensus, backed by science, is emerging among the international community that by 2050 we need to reduce emissions of C02, methane and other greenhouse gases to approximately 80 percent lower than they were in 1990.
Read more ....
Synthetic Cells Get Together To Make Electronics
Collections of a few protocells connected by shared membranes penetrated by pores (a) can be used in groups to perform as electronic devices (b), in this case as a rectifier, or AC to DC converter. (Image: Nature)
From New Scientist:
A network of artificial cells that work together to act as an AC/DC converter has been built. Demonstrating that synthetic cells can team up to achieve such feats is a step towards building synthetic tissues to interface biology with electronics, says the team of chemists behind the work.
Synthetic biologists have show they can reprogram living cells to make them produce drug compounds, and are even working towards building cells from scratch to create artificial life.
But that work focuses on only individual cells, says Hagan Bayley at the University of Oxford. He's more interested in making artificial tissue in which individual synthetic cells work together.
Read more ....
Shuttle Launch Delayed To July By Hydrogen Leak
Space shuttle Endeavour sits on the launch pad early Wednesday morning June 17, 2009. Racing against the clock, NASA began fueling shuttle Endeavour for a Wednesday launch to the international space station after thunderstorms caused a three-hour delay. Hydrogen gas is leaking again from a vent line on space shuttle Endeavour's external fuel tank causing an additional delay and threatening to postpone the launch until July. (AP Photo)
From Yahoo News/AP:
CAPE CANAVERAL, Fla. – For the second time in four days, a potentially dangerous hydrogen gas leak forced NASA to delay shuttle Endeavour's launch to the international space station, this time until July at the earliest.
Launch officials waited almost an hour after the leak appeared during fueling, trying to fix it through remote commands, before calling off Wednesday's pre-dawn launch.
Read more ....
Brazil Finds New Strain Of H1N1 Virus
From Breitbart/AFP:
Brazilian scientists have identified a new strain of the H1N1 virus after examining samples from a patient in Sao Paulo, their institute said Tuesday.
The variant has been called A/Sao Paulo/1454/H1N1 by the Adolfo Lutz Bacteriological Institute, which compared it with samples of the A(H1N1) swine flu from California.
The genetic sequence of the new sub-type of the H1N1 virus was isolated by a virology team lead by one of its researchers, Terezinha Maria de Paiva, the institute said in a statement.
Read more ....
Brazilian scientists have identified a new strain of the H1N1 virus after examining samples from a patient in Sao Paulo, their institute said Tuesday.
The variant has been called A/Sao Paulo/1454/H1N1 by the Adolfo Lutz Bacteriological Institute, which compared it with samples of the A(H1N1) swine flu from California.
The genetic sequence of the new sub-type of the H1N1 virus was isolated by a virology team lead by one of its researchers, Terezinha Maria de Paiva, the institute said in a statement.
Read more ....
Magnetic Super-atoms Discovered
VCs8 and MnAu24(SH)18 magnetic superatoms that mimic a manganese atom. The MnAu24 cluster is surrounded by sulfur and hydrogen atoms to protect it against outside attack, thus making it valuable for use in biomedical applications. (Credit: Image courtesy of Ulises Reveles, Ph.D, VCU.)
From Science Daily:
ScienceDaily (June 16, 2009) — A team of Virginia Commonwealth University scientists has discovered a ‘magnetic superatom’ – a stable cluster of atoms that can mimic different elements of the periodic table – that one day may be used to create molecular electronic devices for the next generation of faster computers with larger memory storage.
The newly discovered cluster, consisting of one vanadium and eight cesium atoms, acts like a tiny magnet that can mimic a single manganese atom in magnetic strength while preferentially allowing electrons of specific spin orientation to flow through the surrounding shell of cesium atoms. The findings appear online in the journal Nature Chemistry.
Read more ....
Tuesday, June 16, 2009
Road Rage: Why We Lose It
The root of road rage: Humans are territorial, and the car is an extension of a person's territory, AAA says. Image credit: stockxpert
From Live Science:
In a new survey on which of 25 major U.S. cities have the most aggressive drivers, Miami dropped from 1st to 7th, Reuters reports. The Top 3:
1. New York
2. Dallas/Fort Worth
3. Detroit
Hey! My city should be No. 1. @#%$@#!
Yes, and it's exactly that attitude that gives us road rage.
While no statistics are kept specifically on road rage, the National Highway Traffic Safety Administration (NHTSA) estimates that aggressive driving causes about a third of all crashes and about two-thirds of automobile fatalities. And studies show it's not just total jerks who become enraged.
But why does getting behind the wheel transform the meek and mild into raving, dangerous idiots?
Read more ....
New Exotic Material Could Revolutionize Electronics
Surface electron band structure of bismuth telluride.
(Credit: Image courtesy of Yulin Chen and Z. X. Shen)
(Credit: Image courtesy of Yulin Chen and Z. X. Shen)
From Science Daily:
ScienceDaily (June 16, 2009) — Move over, silicon—it may be time to give the Valley a new name. Physicists at the Department of Energy's (DOE) SLAC National Accelerator Laboratory and Stanford University have confirmed the existence of a type of material that could one day provide dramatically faster, more efficient computer chips.
Recently-predicted and much-sought, the material allows electrons on its surface to travel with no loss of energy at room temperatures and can be fabricated using existing semiconductor technologies. Such material could provide a leap in microchip speeds, and even become the bedrock of an entirely new kind of computing industry based on spintronics, the next evolution of electronics.
Read more ....
Alcohol Goes To The Head In Six Minutes, Scientists Say
From The Telegraph:
Alcohol goes to your head in just six minutes, scientists revealed on Tuesday.
For the first time, researchers have proved the rapid changes that drinking alcohol causes in human brain cells.
Previous tests on how alcohol affects the brain have only been done on animals.
Scientists set out to test the well-known saying that just one drink can quickly go to your head.
Only six minutes after consuming an amount of alcohol equivalent to three glasses of beer or two glasses of wine, leading to a blood alcohol level of 0.05 to 0.06 percent, changes had already taken place in brain cells.
Read more ....
Update: Alcohol really does go to your head fast -- The Telegraph
Return of the Once-Rare Beaver? Not in My Yard.
CONSTRUCTION AREA A beaver dam in Boxborough Station Wildlife Management Area in Massachusetts has helped create wetlands. Travis Dove for The New York Times
From The New York Times:
CONCORD, Mass. — The dozens of public works officials, municipal engineers, conservation agents and others who crowded into a meeting room here one recent morning needed help. Property in their towns was flooding, they said. Culverts were clogged. Septic tanks were being overwhelmed.
“We have a huge problem,” said David Pavlik, an engineer for the town of Lexington, where dams built by beavers have sent water flooding into the town’s sanitary sewers. “We trapped them,” he said. “We breached their dam. Nothing works. We are looking for long-term solutions.”
Mary Hansen, a conservation agent from Maynard, said it starkly: “There are beavers everywhere.”
Read more ....
The Web Back In 1996-1997
From Pingdom:
Back in 1996 the Web was starting to gain some serious momentum, but it was still just a few years old. Now in 2008, looking 12 years back into the past of the Web can be a both nostalgic and entertaining experience.
To give you some perspective, in 1996…
* Google.com didn’t exist yet.
* In January 1996 there were only 100,000 websites, compared to more than 160 million in 2008.
* The web browser of choice was Netscape Navigator, followed by Microsoft Internet Explorer as a distant second (Microsoft launched IE 3 in 1996).
* Most people used dial-up Internet connections with mighty speeds ranging from 28.8Kbps to 33.6Kbps. Highly modern 56Kbps modems would arrive in 1997.
* People had only recently started to switch from 640×480 to 800×600 screen resolutions.
We have used the good old WayBack Machine (a.k.a the Internet Archive) to track down screenshots of what websites looked like back in 1996-97.
Read more ....
Hat Tip: Geek Press
NASA Will Try To Launch Space Shuttle Wednesday
The space shuttle Endeavour sits on Launch Pad 39-A hours after being scrubbed due a hydrogen leak Saturday morning, June 13, 2009 at the Kennedy Space Center in Cape Canaveral, Fla. Seven astronauts were scheduled to liftoff on a trip to the international space station. (AP Photo/Chris O'Meara)
From Yahoo News/AP:
CAPE CANAVERAL, Fla. – NASA will try to launch space shuttle Endeavour again Wednesday, after repairing a hydrogen gas leak that thwarted the first attempt.
Top officials decided Monday to bump an unmanned moon mission so Endeavour could have another shot at flying to the international space station. The delayed moon mission is NASA's first in a decade and is critical to the space agency's long-term effort to return humans to the lunar surface.
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500th Astronaut Heads For Space
From Scientific American:
A little-noticed but historic milestone will be reached this week when the 500th person ever to fly in space blasts off. The moment will come whenever NASA's shuttle Endeavour finally launches to continue building the international space station. Endeavour's crew of seven will include four rookie astronauts, making their first trip into orbit. But the crew agreed that former naval commander Chris Cassidy, 39, who has led combat missions in Afghanistan, will take the honour.
Endeavour's crew of seven will include four rookie astronauts, making their first trip into orbit. But the crew agreed that former naval commander Chris Cassidy, 39, who has led combat missions in Afghanistan, will take the honour.
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Carbon Nanotubes May Suppress Human Immunity
From The Guardian:
The findings from animal research suggest workers involved in the manufacture of the materials may be at risk
Inhaling carbon nanotubes can suppress the immune system, according to scientists. The findings raise possible health concerns for those working in the manufacture of the materials.
Carbon nanotubes are rolled-up sheets of graphite thousands of times thinner than a human hair. Because they are immensely strong and are good electric conductors, they are poised for use in a wide range of fields from engineering to medicine. However, there are concerns over the similar shape of nanotubes and asbestos fibres, which are known to cause damage to the lungs in conditions such as mesothelioma.
Read more ....
Monday, June 15, 2009
New Test Reveals Parthenon's Hidden Colour
The Parthenon would once have been much more gaudy (Image: Roy Rainford/Robert Harding/Rex Features)
From New Scientist:
Images of the Parthenon as a stark, white structure set against an azure sky will have to change. Researchers have found the first evidence of coloured paints covering its elaborate sculptures.
The temple, which tops the Acropolis in Athens, Greece, dates from the 5th century BC. Its carved statues and friezes show scenes from Greek mythology and are some of the most impressive sculptures to survive from ancient Greece.
Pigments are known to have adorned other Greek statues and temples, but despite 200 years of searching, archaeologists had found no trace of them on the Parthenon's sculptures.
Read more ....
From New Scientist:
Images of the Parthenon as a stark, white structure set against an azure sky will have to change. Researchers have found the first evidence of coloured paints covering its elaborate sculptures.
The temple, which tops the Acropolis in Athens, Greece, dates from the 5th century BC. Its carved statues and friezes show scenes from Greek mythology and are some of the most impressive sculptures to survive from ancient Greece.
Pigments are known to have adorned other Greek statues and temples, but despite 200 years of searching, archaeologists had found no trace of them on the Parthenon's sculptures.
Read more ....
Five Discoveries Made While Dreaming
From The BBC:
Scientists believe that a nap can boost creative thought and help problem-solving. So what major breakthroughs in science and the arts have been made during sleep?
The old adage "I'll sleep on it" may have some truth in it, after all.
A study by researchers at the University of California San Diego has concluded that problems are more likely to be solved after a period of dreamy (rapid eye movement) sleep.
Scientists believe so-called REM sleep allows the brain to form new nerve connections without the interference of other thought pathways that occur when we are awake or in non-dreamy sleep.
Anecdotal evidence from some key figures in the arts and science suggests there could be some truth in this.
Here are some examples of major discoveries made in dreams.
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Some Wine Can Improve If Stored In A Carton Rather Than In A Bottle
From The Economist:
AMONG snobs and sommeliers, nothing can compete with wine in a glass bottle sealed with a cork stopper. Yet as cheap alternatives to cork have become available and high fuel prices have made transporting glass more expensive, some winemakers have adopted an alternative method of storage: putting wine in cartons, like those used for milk, made from layers of polythene, paper and aluminium foil. Admittedly, serving wine from a carton lacks the aesthetic appeal of a bottle, and cartons have also been criticised for allowing flavour-destroying oxygen to seep in during storage. A new study, however, reveals that although the criticism of wine cartons for allowing oxidation is valid, they have the advantage of soaking up chemicals that can ruin the flavour in other ways.
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Evolution Can Occur In Less Than 10 Years, Guppy Study Finds
From Science Daily:
ScienceDaily (June 15, 2009) — How fast can evolution take place? In just a few years, according to a new study on guppies led by UC Riverside's Swanne Gordon, a graduate student in biology.
Gordon and her colleagues studied guppies — small fresh-water fish biologists have studied for long — from the Yarra River, Trinidad. They introduced the guppies into the nearby Damier River, in a section above a barrier waterfall that excluded all predators. The guppies and their descendents also colonized the lower portion of the stream, below the barrier waterfall, that contained natural predators.
Read more ....
Top 10 Amazing Moon Facts
From Live Science:
NASA's Lunar Reconnaissance Orbiter (LRO), slated for launch this week, will map the moon's surface from orbit with unprecedented detail, capable even of imaging the tracks that lunar rovers left behind.
Also heading moonward is the Lunar Crater Observation and Sensing Satellite (LCROSS), which will slam into the Shackleton Crater on the south pole of the moon in a few months and kick up material that could have been in shadow for 2 billion years. Another probe will slam into the moon a few minutes later at a different location.
It's all an effort to learn more about what the moon is made of, whether there is water ice in the crater, and therefore where to send U.S. astronauts in a planned return by 2020.
Read more ....
Herschel Telescope 'Opens Eyes'
Key features on the Herschel space observatory. The inset compares Herschel with Hubble and the future James Webb Space Telescope.
From The BBC:
Europe's new billion-euro Herschel space observatory, launched in May, has achieved a critical milestone.
The telescope has opened the hatch that has been protecting its sensitive instruments from contamination.
The procedure allowed light collected by Herschel's giant 3.5m mirror to flood its supercold instrument chamber, or cryostat, for the first time.
The observatory's quest is to study how stars and galaxies form, and how they evolve through cosmic time.
Read more ....
Crops Under Stress As Temperatures Fall
Our politicians haven't noticed that the problem may be that the world is not warming but cooling, observes Christopher Booker.
From The Telegraph:
For the second time in little over a year, it looks as though the world may be heading for a serious food crisis, thanks to our old friend "climate change". In many parts of the world recently the weather has not been too brilliant for farmers. After a fearsomely cold winter, June brought heavy snowfall across large parts of western Canada and the northern states of the American Midwest. In Manitoba last week, it was -4ºC. North Dakota had its first June snow for 60 years.
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My Comment: I have a farm in Southern Quebec .... we are 3 weeks behind in our planting.
How The World's Greatest Golfer Lost His Game
Ralph Guldahl tees off in front of a large gallery during a 1940s Masters Tournament at Augusta National Golf Club in Augusta, Georgia (Image: Augusta National / Getty Images)
From New Scientist:
In 1939, Ralph Guldahl was a giant in the game of golf. A towering figure on the links, the taciturn Texan seemingly came from nowhere to win successive US Opens in 1937 and 1938, and then the Masters in 1939. But after writing Groove Your Golf, a step-by-step guide for beginners, Guldahl never won another championship. "He went from being the being temporarily the best player in the world, to one who couldn't play at all," said fellow PGA champion Paul Runyan. The question that has haunted golfers ever since is: did too much thinking derail one of the sport's greatest talents?
"HOW can you hit and think at the same time?" the gnomic American baseball player Yogi Berra once asked. It's a question that has hung for decades over a forgotten great of golfing: a tall, shy Texan called Ralph Guldahl.
Read more ....
My Comment: This still does not explain my (lousy) game.
From New Scientist:
In 1939, Ralph Guldahl was a giant in the game of golf. A towering figure on the links, the taciturn Texan seemingly came from nowhere to win successive US Opens in 1937 and 1938, and then the Masters in 1939. But after writing Groove Your Golf, a step-by-step guide for beginners, Guldahl never won another championship. "He went from being the being temporarily the best player in the world, to one who couldn't play at all," said fellow PGA champion Paul Runyan. The question that has haunted golfers ever since is: did too much thinking derail one of the sport's greatest talents?
"HOW can you hit and think at the same time?" the gnomic American baseball player Yogi Berra once asked. It's a question that has hung for decades over a forgotten great of golfing: a tall, shy Texan called Ralph Guldahl.
Read more ....
My Comment: This still does not explain my (lousy) game.
Sunday, June 14, 2009
NASA Builds World's Largest Space Parachute For Martian Landing
From Popular Mechanics:
To survive the thin Martian atmosphere, the 2000-plus-lb. Mars Science Laboratory rover will depend on the largest space parachute ever built. Here’s how NASA’s next chute will work.
When the NASA Mars Science Laboratory rover lands on Mars in 2012, it will face a unique obstacle: With an Earth weight of nearly a ton (compared to about 400 pounds for previous Mars rovers) and a Mars weight of about 750 pounds, it is too massive for any existing space parachute. So to cushion its fall through the thin Martian atmosphere (which is less than 1 percent as dense as Earth’s), NASA engineers had to come up with something really big. The new parachute opens to a diameter of 52 feet, making it twice the size of any parachute ever flown beyond Earth.
Read more ....
Argentine Glacier Advances Despite Global Warming
In this May 18, 2009 file photo, a tourist looks back through a cave on Perito Moreno Glacier in Los Glaciares National Park in Argentina's Patagonia region. (AP Photo/Natacha Pisarenko, File)
From Yahoo News/AP:
BUENOS AIRES, Argentina – Argentina's Perito Moreno glacier is one of only a few ice fields worldwide that have withstood rising global temperatures.
Nourished by Andean snowmelt, the glacier constantly grows even as it spawns icebergs the size of apartment buildings into a frigid lake, maintaining a nearly perfect equilibrium since measurements began more than a century ago.
"We're not sure why this happens," said Andres Rivera, a glacialist with the Center for Scientific Studies in Valdivia, Chile. "But not all glaciers respond equally to climate change."
Read more ....
Sonic Disruptions Create Artificial Black Hole
None More Black : Erlenmeyer fask. Check. Beaker. Check. Black hole. Ummm... courtesy of Wikimedia Commons
From Popsci.com:
After 30 years of trying, scientists create first-ever acoustic black hole.
Stephen Hawking once theorized that black holes would emit a stream of electromagnetic radiation named, what else, Hawking Radiation. However, in the 35 years since Hawking made his prediction, no one has observed the phenomena. Now, a team of Israeli scientists are working on a way to make their own Hawking Radiation by creating an artificial black hole in their lab.
Read more ....
Can Microsoft's Bing Really Challenge Google?
From Times Online:
Bing will start to take on the mighty Google in the battle for web search supremacy this week; UK version a 'Beta test'
The two biggest names in technology are set to slug it out over the coming weeks in a $20 billion (£12 billion) battle for web supremacy. In one corner is Google, the dominant player in online searches; in the other is Microsoft, the world’s biggest software company. Microsoft is poised to launch Bing, a new search engine it says will give more useful results and end its rival’s hegemony.
If the software lives up to its maker’s claims, it will allow users to target their searches more accurately and do away with the millions of irrelevant results that many searches retrieve on Google. Microsoft calls it a “decision engine” because, it claims, it refines your search more carefully and offers a list of topics of related interest — something Google doesn’t do.
Read more ....
How A Solar System 'Wobble' Could Make The Earth Crash Into Mars... But Don't Worry, It Won't Happen For 3 Billion Years
Scientists have discovered that small rocky planets like Earth are far less stable than the gas giants
From The Daily Mail:
A wobble in the precise clockwork of the solar system could see the Earth collide with Mercury, Mars or Venus, scientists predict.
But they say reassuringly that such a mishap is unlikely to occur for billions of years.
The orbits of the planets are not completely stable because of the gravitational interplay between them.
Over time, the system can become increasingly disordered - like a poorly balanced tyre that eventually tears itself off the axle of a moving car.
Read more ....
What Really Prompts The Dog's 'Guilty Look'
From Science Daily:
ScienceDaily (June 14, 2009) — What dog owner has not come home to a broken vase or other valuable items and a guilty-looking dog slouching around the house? By ingeniously setting up conditions where the owner was misinformed as to whether their dog had really committed an offense, Alexandra Horowitz, Assistant Professor from Barnard College in New York, uncovered the origins of the “guilty look” in dogs in the recently published “Canine Behaviour and Cognition” Special Issue of Elsevier’s Behavioural Processes.
Horowitz was able to show that the human tendency to attribute a “guilty look” to a dog was not due to whether the dog was indeed guilty. Instead, people see ‘guilt’ in a dog’s body language when they believe the dog has done something it shouldn’t have – even if the dog is in fact completely innocent of any offense.
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Marijuana Damages DNA and May Cause Cancer
From Live Science:
A lot of studies have shown marijuana is not good for you. It can fry the brain and contribute to psychosis. The latest one finds "convincing evidence" that marijuana smoke damages the genetic material DNA in ways that could increase the risk of cancer.
Toxic substances in tobacco smoke can damage DNA and increase the risk of lung and other cancers. However, there has been uncertainty over whether marijuana smoke has the same effect.
Scientists are especially concerned about the toxicity of acetaldehyde, present in both tobacco and marijuana. However, it has been difficult to measure DNA damage from acetaldehyde with conventional tests.
Read more ....
A lot of studies have shown marijuana is not good for you. It can fry the brain and contribute to psychosis. The latest one finds "convincing evidence" that marijuana smoke damages the genetic material DNA in ways that could increase the risk of cancer.
Toxic substances in tobacco smoke can damage DNA and increase the risk of lung and other cancers. However, there has been uncertainty over whether marijuana smoke has the same effect.
Scientists are especially concerned about the toxicity of acetaldehyde, present in both tobacco and marijuana. However, it has been difficult to measure DNA damage from acetaldehyde with conventional tests.
Read more ....
The Evolution of House Cats
From Scientific American:
Genetic and archaeological findings hint that wildcats became house cats earlier--and in a different place--than previously thought
It is by turns aloof and affectionate, serene and savage, endearing and exasperating. Despite its mercurial nature, however, the house cat is the most popular pet in the world. A third of American households have feline members, and more than 600 million cats live among humans worldwide. Yet as familiar as these creatures are, a complete understanding of their origins has proved elusive. Whereas other once wild animals were domesticated for their milk, meat, wool or servile labor, cats contribute virtually nothing in the way of sustenance or work to human endeavor. How, then, did they become commonplace fixtures in our homes?
Read more ....
Genetic and archaeological findings hint that wildcats became house cats earlier--and in a different place--than previously thought
It is by turns aloof and affectionate, serene and savage, endearing and exasperating. Despite its mercurial nature, however, the house cat is the most popular pet in the world. A third of American households have feline members, and more than 600 million cats live among humans worldwide. Yet as familiar as these creatures are, a complete understanding of their origins has proved elusive. Whereas other once wild animals were domesticated for their milk, meat, wool or servile labor, cats contribute virtually nothing in the way of sustenance or work to human endeavor. How, then, did they become commonplace fixtures in our homes?
Read more ....
Saturday, June 13, 2009
Microsoft To Give Away Anti-Virus
From The BBC:
Microsoft is poised to start giving away security software.
The company is reportedly trialling free anti-virus software internally and said the beta version would be released "soon".
Called Morro, the software will tackle viruses but lack the broader range of utilities, such as parental locks, found in paid-for security suites.
Morro will be Microsoft's second venture in the highly competitive security market.
Microsoft's first attempt revolved around the Windows Live OneCare service that did not succeed in turning many customers away from rivals such as Symantec and McAfee.
Read more ....
Microsoft is poised to start giving away security software.
The company is reportedly trialling free anti-virus software internally and said the beta version would be released "soon".
Called Morro, the software will tackle viruses but lack the broader range of utilities, such as parental locks, found in paid-for security suites.
Morro will be Microsoft's second venture in the highly competitive security market.
Microsoft's first attempt revolved around the Windows Live OneCare service that did not succeed in turning many customers away from rivals such as Symantec and McAfee.
Read more ....
Gravity Mysteries: What Is Gravity?
Image: We tend to think of gravity as a force that affects objects, but Einstein showed it was something else entirely (Image: Alex Telfer Photography Limited / Getty)
From New Scientist:
You jump up, and gravity brings you back down to Earth. You reach the brow of a hill and gravity accelerates you down the other side. All neat and tidy then: gravity behaves in the way Newton thought of it, as a force that affects and changes the motion of something else.
That, at least, was how it seemed until Einstein came along. His general theory of relativity tells us that gravity is not quite that simple.
General relativity provides a framework under which the laws of physics look the same for everyone at every moment, regardless of how they are moving. Einstein achieved this by making gravity a property of the universe, rather than of individual bodies.
Read more ....
From New Scientist:
You jump up, and gravity brings you back down to Earth. You reach the brow of a hill and gravity accelerates you down the other side. All neat and tidy then: gravity behaves in the way Newton thought of it, as a force that affects and changes the motion of something else.
That, at least, was how it seemed until Einstein came along. His general theory of relativity tells us that gravity is not quite that simple.
General relativity provides a framework under which the laws of physics look the same for everyone at every moment, regardless of how they are moving. Einstein achieved this by making gravity a property of the universe, rather than of individual bodies.
Read more ....
Early Rocks To Reveal Their Ages
From BBC:
A new technique has been helping scientists piece together how the Earth's continents were arranged 2.5 billion years ago.
The novel method allows scientists to recover rare minerals from rocks.
By analysing the composition of these minerals, researchers can precisely date ancient volcanic rocks for the first time.
By aligning rocks that have a similar age and orientation, the early landmasses can be pieced together.
This will aid the discovery of rocks rich in ore and oil deposits, say the scientists. The approach has already shown that Canada once bordered Zimbabwe, helping the mining industry identify new areas for exploration.
Read more ....
A new technique has been helping scientists piece together how the Earth's continents were arranged 2.5 billion years ago.
The novel method allows scientists to recover rare minerals from rocks.
By analysing the composition of these minerals, researchers can precisely date ancient volcanic rocks for the first time.
By aligning rocks that have a similar age and orientation, the early landmasses can be pieced together.
This will aid the discovery of rocks rich in ore and oil deposits, say the scientists. The approach has already shown that Canada once bordered Zimbabwe, helping the mining industry identify new areas for exploration.
Read more ....
Leak Halts Shuttle Launching
There would be no countdown to launch after NASA delayed the launch of the space shuttle Endeavour due to a hydrogen gas leak. Stan Honda/Agence France-Presse — Getty Images
From The New York Times:
KENNEDY SPACE CENTER, Fla. — The launching of the space shuttle Endeavour on Saturday was called off because of a hydrogen leak similar to one that delayed another shuttle’s departure three months ago.
During fueling with liquid hydrogen, sensors detected a leak at the valve next to the external tank, creating a potential for fire.
The planned 7:17 a.m. liftoff was called off at 12:26 a.m. and will be delayed at least four days. A similar leak occurred during the countdown for the shuttle Discovery in March.
Mission managers originally said that if the Endeavour could not go by Monday, the launching would be moved to July because a lunar orbiter was scheduled to lift off Wednesday.
Read more ....
Red Wine Compound Resveratrol Demonstrates Significant Health Benefits
Low to moderate drinking -- especially of red wine -- appears to reduce all causes of mortality. (Credit: iStockphoto)
From Science Daily:
ScienceDaily (June 12, 2009) — The benefits of alcohol are all about moderation. Low to moderate drinking – especially of red wine – appears to reduce all causes of mortality, while too much drinking causes multiple organ damage. A mini-review of recent findings on red wine's polyphenols, particularly one called resveratrol, will be published in the September issue of Alcoholism: Clinical & Experimental Research; the review is also available at Early View.
"Reports on the benefits of red wine are almost two centuries old," said Lindsay Brown, associate professor in the School of Biomedical Sciences at The University of Queensland and corresponding author for the study. "The media developed the more recent story of the French paradox in the early 1990s. However, studies on the actions of resveratrol, one of the active non-alcoholic ingredients, were uncommon until research around 1997 showed prevention of cancers. This led to a dramatic interest in this compound."
Read more ....
Genetic Difference Found in Wild vs. Tame Animals
From Live Science:
A study of nasty and nice lab rats has scientists on the verge of knowing the genes that separate wild animals like lions and wolves from their tame cousins, cats and dogs.
Unlike their wild ancestors, house pets and other domesticated animals share the trait of tameness, meaning they tolerate or even seek out human presence. New research, which is published in the June issue of the journal Genetics and involved the interbreeding of friendly and aggressive rats, reveals gene regions that influence the opposing behaviors.
Read more ....
Mind-Reading Tech May Not Be Far Off
From Popsci.com:
At the World Science Festival this week, indications that brain scanners may soon uncover your private thoughts
Neuroscientists are already able to read some basic thoughts, like whether an individual test subject is looking at a picture of a cat or an image with a specific left or right orientation. They can even read pictures that you're simply imagining in your mind's eye. Even leaders in the field are shocked by how far we've come in our ability to peer into people's minds. Will brain scans of the future be able to tell if a person is lying or telling the truth? Suggest whether a consumer wants to buy a car? Reveal our secret likes and dislikes, or our hidden prejudices? While we aren't there yet, these possibilities have dramatic social, legal and ethical implications.
Read more ....
Get Ready! Facebook To Offer Personalised URLs From Tomorrow
From The Daily Mail:
Facebook users will soon be able to choose a web address for their profile page which is all together more personal.
At present anyone with a Facebook account has a string of random numbers at the end of their web address. However from 5am tomorrow (BST) they will be able to create a memorable URL by adding their name, such as www.facebook.com/joebloggs.
Tags will be assigned on a first come first served basis so those with common names will need to get in quick. The website founder, Mark Zuckerberg, has already claimed his.
Read more ....
Friday, June 12, 2009
Search For ET Just Got Easier: Effective Way To Search Atmospheres Of Planets For Signs Of Life
An artist's concept of the sunlight glowing through the Earth's thin atmosphere and reaching an observer on the Moon during a lunar eclipse. (Credit: Gabriel Perez Diaz, SMM, Instituto de Astrofisica de Canarias (IAC))
From Science Daily:
ScienceDaily (June 12, 2009) — Astronomers using the Science and Technology Facilities Council's (STFC) William Herschel Telescope (WHT) on La Palma have confirmed an effective way to search the atmospheres of planets for signs of life, vastly improving our chances of finding alien life outside our solar system.
The team from the Instituto de Astrofisica de Canarias (IAC) used the WHT and the Nordic Optical Telescope (NOT) to gather information about the chemical composition of the Earth's atmosphere from sunlight that has passed through it. The research is published June11 in Nature.
Read more ....
Global Biosphere Images Reveal Changes in Plant Growth
The 2008 global biosphere. Chlorophyll concentration in blue, vegetation index in green. Credit: NASA/Rob Simmon/Jesse Allen.
From Live Science:
A new series of NASA images illustrates how Earth's plant growth has changed over the past 11 years.
The images are part of the series, "World of Change: Global Biosphere." They show the yearly changes in plant growth between 1999 and 2008 based on data on chlorophyll on the ocean's surface and vegetation density on land. Scientists use the images to study Earth's carbon cycle – the uptake and release of carbon by Earth's biosphere.
The global biosphere, or the sum of all ecosystems that support life on Earth, is in constant flux. The images show changes in chlorophyll, the green pigment in plants allows photosynthesis to occur, averaged over each year. Changes in land growth are shown as a vegetation index, a blend of the variation between the summer flourishes and the slow growth winter.
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The Inside Story Of The Conficker Worm
The Conficker worm has seized control of millions of computers in just
a few months (Image: Carsten Müller / stock.xchng)
a few months (Image: Carsten Müller / stock.xchng)
From New Science:
A HOTEL bar in Arlington, Virginia, 23 October 2008. A group of computer security experts has spent the day holed up with law enforcement agencies. It is an annual event that attracts the best in the business, but one the participants like to keep low-key - and under the radar of the cybercriminals they are discussing.
That evening, conversation over drinks turned to a security update Microsoft had just released. Its timing was suspicious: updates usually came once a month, and the next was not due for two weeks. "I remember thinking I should take a look at this," recalls Paul Ferguson, a researcher at Trend Micro, a web security company in Cupertino, California.
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Large Hadron Collider To Start Again, But Costs Rise In Race To Discover 'God Particle'
From The Telegraph:
The Large Hadron Collider is to be run flat out throughout the year in order to make up for lost time and to beat an American rival to finding the elusive Higgs Boson – known as the "God Particle".
The £4bn particle accelerator, which broke down last year, was to be turned off in winter to reduce energy demands during peak electricity prices.
But the delays and the news that a smaller less powerful accelerator at Fermilab in Illinois is closing in on the particle has meant it will continue running throughout the year – at an extra cost of £13 million.
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Launching Saturday: Shuttle Endeavour Headed For Space Station
From Yahoo News/Space.com:
CAPE CANAVERAL, Fla. - Seven astronauts are set to blast off on the space shuttle Endeavour Saturday morning on an ambitious mission bound for the International Space Station.
The shuttle is scheduled to lift off at 7:17 a.m. EDT (1117 GMT) from the seaside Launch Pad 39A here at NASA's Kennedy Space Center. Endeavour is slated for a grueling 16-day mission to ferry the final element of the space station's Japanese-built Kibo laboratory.
"We all realize that we have a tremendous amount of work to do," said Endeavour commander Mark Polansky. "We do know it's a combination of a sprint and a marathon, because it's a long, long mission."
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Wired Science News for Your Neurons Scientists Create a Form of Pre-Life
From Wired Science:
A self-assembling molecule synthesized in a laboratory may resemble the earliest form of information-carrying biological material, a transitional stage between lifeless chemicals and the complex genetic architectures of life.
Called tPNA, short for thioester peptide nucleic acids, the molecules spontaneously mimic the shape of DNA and RNA when mixed together. Left on their own, they gather in shape-shifting strands that morph into stable configurations.
The molecules haven’t yet achieved self-replication, the ultimate benchmark of life, but they hint at it. Best of all, their activities require no enzymes — molecules that facilitate chemical reactions, but didn’t yet exist in the primordial world modeled by scientists seeking insight into life’s murky origins.
Read more ....
A self-assembling molecule synthesized in a laboratory may resemble the earliest form of information-carrying biological material, a transitional stage between lifeless chemicals and the complex genetic architectures of life.
Called tPNA, short for thioester peptide nucleic acids, the molecules spontaneously mimic the shape of DNA and RNA when mixed together. Left on their own, they gather in shape-shifting strands that morph into stable configurations.
The molecules haven’t yet achieved self-replication, the ultimate benchmark of life, but they hint at it. Best of all, their activities require no enzymes — molecules that facilitate chemical reactions, but didn’t yet exist in the primordial world modeled by scientists seeking insight into life’s murky origins.
Read more ....
Labels:
artificial life,
early earth,
genetics
Fact or Fiction: Dogs Can Talk
From Scientific American:
Are human speech-like vocalizations made by some mammals equivalent to conversation--or just a rough estimation of it?
Maya, a noisy, seven-year-old pooch, looks straight at me. And with just a little prompting from her owner says, "I love you." Actually, she says "Ahh rooo uuu!"
Maya is working hard to produce what sounds like real speech. "She makes these sounds that really, really sound like words to everyone who hears her, but I think you have to believe," says her owner, Judy Brookes.
Read more ....
My Comment: I do not know if dogs can talk, but I do know that I can always talk to my dog.
Are human speech-like vocalizations made by some mammals equivalent to conversation--or just a rough estimation of it?
Maya, a noisy, seven-year-old pooch, looks straight at me. And with just a little prompting from her owner says, "I love you." Actually, she says "Ahh rooo uuu!"
Maya is working hard to produce what sounds like real speech. "She makes these sounds that really, really sound like words to everyone who hears her, but I think you have to believe," says her owner, Judy Brookes.
Read more ....
My Comment: I do not know if dogs can talk, but I do know that I can always talk to my dog.
Antibody Drugs Customized by Genotype
Image: Group therapy: Genetic differences affect how patients respond to monoclonal-antibody therapies. PIKAMAB believes that it can sort patients into specific groups and tailor treatments accordingly. Credit: Technology Review
From Technology Review:
A company wants to improve monoclonal-antibody therapies by tailoring them to patients' genotypes.
Monoclonal antibodies, which are engineered to hone in on very specific biological targets, have taken off therapeutically in recent years: several are now approved for treating cancers and autoimmune diseases, and nearly 200 are in clinical trials. But one of the challenges of monoclonal-antibody therapy is the fact that some people respond very well to the drugs while others respond only moderately or not at all.
A startup called PIKAMAB, based in Menlo Park, CA, believes that it can make monoclonal antibodies more effective by grouping patients together based on their genotype and offering a customized antibody developed for that genotype. The company hopes that this "stratified" approach to drug development and treatment will help drug companies achieve better results.
Read more ....
From Technology Review:
A company wants to improve monoclonal-antibody therapies by tailoring them to patients' genotypes.
Monoclonal antibodies, which are engineered to hone in on very specific biological targets, have taken off therapeutically in recent years: several are now approved for treating cancers and autoimmune diseases, and nearly 200 are in clinical trials. But one of the challenges of monoclonal-antibody therapy is the fact that some people respond very well to the drugs while others respond only moderately or not at all.
A startup called PIKAMAB, based in Menlo Park, CA, believes that it can make monoclonal antibodies more effective by grouping patients together based on their genotype and offering a customized antibody developed for that genotype. The company hopes that this "stratified" approach to drug development and treatment will help drug companies achieve better results.
Read more ....
Thursday, June 11, 2009
Health Risks Of Nanotechnology: How Nanoparticles Can Cause Lung Damage, And How The Damage Can Be Blocked
From Science Daily:
ScienceDaily (June 11, 2009) — Scientists have identified for the first time a mechanism by which nanoparticles cause lung damage and have demonstrated that it can be combated by blocking the process involved, taking a step toward addressing the growing concerns over the safety of nanotechnology.
Nanotechnology, the science of the extremely tiny (one nanometre is one-billionth of a metre), is an important emerging industry with a projected annual market of around one trillion US dollars by 2015. It involves the control of atoms and molecules to create new materials with a variety of useful functions, including many that could be exceptionally beneficial in medicine. However, concerns are growing that it may have toxic effects, particularly damage to the lungs. Although nanoparticles have been linked to lung damage, it has not been clear how they cause it.
Read more ....
ScienceDaily (June 11, 2009) — Scientists have identified for the first time a mechanism by which nanoparticles cause lung damage and have demonstrated that it can be combated by blocking the process involved, taking a step toward addressing the growing concerns over the safety of nanotechnology.
Nanotechnology, the science of the extremely tiny (one nanometre is one-billionth of a metre), is an important emerging industry with a projected annual market of around one trillion US dollars by 2015. It involves the control of atoms and molecules to create new materials with a variety of useful functions, including many that could be exceptionally beneficial in medicine. However, concerns are growing that it may have toxic effects, particularly damage to the lungs. Although nanoparticles have been linked to lung damage, it has not been clear how they cause it.
Read more ....
The Great Shampoo Sham
You don't need to shampoo daily. And the "no poo" movement suggests you don't do it at all. But if not washing your hair sounds flat-out gross, and yet you want to avoid some iffy chemicals, there are many all-natural shampoos. Image credit: stockxpert
From Live Science:
Shampooing can be complicated. First, there are the convoluted instructions: Lather, rinse, repeat. It doesn't say anything about stopping. And now there's a movement afoot, called the "no poo" movement, advocating no shampooing whatsoever.
Shampoo is indeed a modern invention, as the no-poo'ers attest, developed roughly around the end of the 19th century. And few of us need to be shampooing every day, dermatologists say. That said, the necessity for shampoo varies from person to person, depending on your hair type and what you put in to your hair each day.
Forgoing shampooing completely, if that concept even appeals to you, ultimately could be rough on your hair and rougher on your social interactions.
Read more ....
Seven Mysteries Of Gravity
From New Scientist:
It's the force we all know about and think we understand. It keeps our feet firmly on the ground and our world circling the sun.
Yet look a little closer, and the certainties start to float away, revealing gravity as the most puzzling and least understood of the four fundamental forces of nature.
Michael Brooks investigates its mysterious ways
Read more ....
Famous Star Is Shrinking, Puzzling Astronomers
A Hubble Space Telescope image taken in 1996 shows the red supergiant star Betelgeuse, one of the brightest stars in the familiar constellation Orion.Betelgeuse, one of the largest known stars, is shrinking rapidly and no one knows why, astronomers said at a June 2009 meeting. Image courtesy A. Dupree (CfA), R. Gilliland (STScI), NASA
From The National Geographic:
One of the largest known stars in the universe is shrinking rapidly, and astronomers don't know why.
Betelgeuse (pronounced almost like "beetle juice") is a red supergiant star 600 light-years away in the constellation Orion. From Earth the star is clearly visible with the naked eye as the reddish dot that marks Orion's left shoulder.
Researchers at the University of California, Berkeley, first measured the star in 1993 with an infrared instrument on top of Southern California's Mount Wilson. They estimated the star to be as big around as Jupiter's orbit around the sun.
Read more ....
New, Superheavy Element To Enter Periodic Table
The periodic table in an undated image. A new, superheavy chemical element numbered 112 will soon be officially included in the periodic table, German researchers said. REUTERS/NIST/Handout
From Yahoo News/Reuters:
BERLIN (Reuters) – A new, superheavy chemical element numbered 112 will soon be officially included in the periodic table, German researchers said.
A team in the southwest German city of Darmstadt first produced 112 in 1996 by firing charged zinc atoms through a 120-meter-long particle accelerator to hit a lead target.
"The new element is approximately 277 times heavier than hydrogen, making it the heaviest element in the periodic table," the scientists at the GSI Helmholtz Center for Heavy Ion Research said in a statement late on Wednesday.
The zinc and lead nuclei were fused to form the nucleus of the new element, also known as Ununbium, Latin for 112.
Read more ....
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