They Ate What? 2011 Pet X-ray Contest Winners
|1:10:18 AM, Tuesday, September 27, 2011|
"Veterinary Practice News would like to thank everyone who sent radiographs in for this year’s competition. Each year we’re amazed at the images and stories that come in—we wish we had room to print them all! We would also like to thank the judge, Matt Wright, DVM, Dipl. ACVR, who had the tough task of selecting a winner.
This year’s winner, Vanessa Hawkins, DVM, will receive a digital single-lens reflex camera courtesy of contest sponsor Sound-Eklin of Carlsbad, Calif. The runners-up will receive a point-and-shoot camera. More entries can be seen at VeterinaryPracticeNews.com/Contest..."
-- Yep, follow the link to see the world's smartest pets!
'First Irish Case' of Death by Spontaneous Combustion
|1:02:06 AM, Tuesday, September 27, 2011|
"A man who burned to death in his home died as a result of spontaneous combustion, an Irish coroner has ruled.
West Galway coroner Dr Ciaran McLoughlin said it was the first time in 25 years of investigating deaths that he had recorded such a verdict.
Michael Faherty, 76, died at his home in Galway on 22 December 2010.
Deaths attributed by some to "spontaneous combustion" occur when a living human body is burned without an apparent external source of ignition.
Typically police or fire investigators find burned corpses but no burned furniture.
An inquest in Galway on Thursday heard how investigators had been baffled as to the cause of Mr Faherty's death at his home at Clareview Park, Ballybane.
Forensic experts found that a fire in the fireplace of the sitting room where the badly burnt body was found, had not been the cause of the blaze that killed Mr Faherty.
The court was told that no trace of an accelerant had been found and there had been nothing to suggest foul play.
The court heard Mr Faherty had been found lying on his back with his head closest to an open fireplace.
The fire had been confined to the sitting room. The only damage was to the body, which was totally burnt, the ceiling above him and the floor underneath him.
Dr McLoughlin said he had consulted medical textbooks and carried out other research in an attempt to find an explanation.
He said Professor Bernard Knight, in his book on forensic pathology, had written about spontaneous combustion and noted that such reported cases were almost always near an open fireplace or chimney..."
Hints of Universal Behavior Seen in Exotic Three-Atom States
|12:56:14 AM, Tuesday, September 27, 2011|
"A novel type of inter-particle binding predicted in 1970 and observed for the first time in 2006, is forming the basis for an intriguing kind of ultracold quantum chemistry. Chilled to nano-kelvin temperatures, cesium atoms -- three at a time -- come together to form a bound state hundreds or even thousands of times larger than individual atoms. Unlike the case of ordinary atoms, wherein electrons are bound to a nucleus in a spectrum of energy levels on the order of an electron volt (that is, it would typically take an eV of energy to free the electron), the cesium triplets feature energy levels that are measured in trillionths of an electron volt (peV). Stranger still, a new experiment observing four such cesium states reports that the states' sizes are roughly the same. This has taken theorists by complete surprise.
In the seventeenth century Isaac Newton derived the classical force laws used to calculate the force between two objects. Calculating the behavior of three-body groupings such as the Moon/Earth/Sun system was much harder; indeed Newton never succeeded. Nowadays such problems can be studied with powerful computers, but only numerical simulations are possible, and not exact, analytical solutions.
In 1970, however, Russian physicist Vitaly Efimov predicted that under some special conditions, three bodies, such as atoms at ultralow temperatures, could be made to enter into stable states whose behavior could be calculated with remarkable ease. Then in 2006 exactly such states were actually observed by scientists at the University of Innsbruck. Now, these researchers have extended their work and demonstrated that the "three-body parameter," used to describe how the three participating bodies interact, varies in a consistent way regardless of the atomic species used.
Paul Julienne, a scientist at the Joint Quantum Institute (JQI), operated by the University of Maryland and the National Institute of Standards and Technology (NIST), contributed theoretical help to the Innsbruck scientists conducting the experiment, a team led by Rudolf Grimm. "None of the experts in three-body physics had expected this kind of universal behavior to show up in these 3-atom systems," Julienne said. "This behavior came as a big surprise." And the universality, in turn, might suggest the existence of some new kind of ultracold chemistry at work.
Efimov's 1970 work met with much skepticism, especially since his prediction specified that three particles could form stable partnerships even though none of the two-particle matchups were stable. That is, 3 particles could accomplish what 2 particles could not. This novel arrangement has been compared to the "Borromean Rings," a set of three rings used on heraldic symbol for the Borromeo family during the Italian Renaissance. The three rings hold together unless any one of the rings is removed..."
Space Storms to Pose Greater Risk to Flyers and Astronauts
|12:45:01 AM, Tuesday, September 27, 2011|
"If you thought the outlook for Earth's climate looked bleak, don't look up. A new study suggests that space weather—the hail of energetic particles above our atmosphere—is set to worsen in coming decades. The grim forecast suggests that astronauts and frequent flyers will face greater radiation hazards and could rule out a crewed mission to Mars before 2050.
Space weather is a general term for the environmental conditions above Earth's atmosphere. When space weather is bad, dangerous particles abound. These include protons and ions, known as galactic cosmic rays (GRCs), raining down at near-light speed from space, and similar particles coming in bursts from the sun, called solar energetic particles (SEPs).
The sun has the biggest impact on space weather. The radiation it emits fluctuates both over the short term and across centuries. When the sun is emitting more radiation, it generates a strong external magnetic field, which swaddles the solar system in the "heliosphere"—a shield against GRCs. On the downside, a more active sun is thought to emit SEPs more consistently. Currently, the sun's activity seems to be fading from a "grand maximum" that has been with us since the 1920s, suggesting a new minimum is upon us.
Although that might seem like good news, it's actually not, according to space meteorologist Michael Lockwood of the University of Reading in the United Kingdom and colleagues. Lockwood's group has analyzed how variations in GRCs and SEPs reaching Earth have correlated with the sun's activity over hundreds of years. No one was recording the influx of GRCs or SEPs back then, so the researchers use proxy data taken from the composition of ancient ice cores dug up at the poles. Nitrates are produced as GRCs react with the atmosphere, so an ice sample containing more nitrates is likely to have been frozen at a time of abundant GRCs. Meanwhile, SEPs are thought to fill ice with rare isotopes of beryllium-10.
Lockwood's group found that in times of low solar activity, there seem to have been more GRCs reaching Earth. This wasn't too surprising: low activity means the solar system's shield—the heliosphere—would have been weaker. The researchers also found that low solar activity seemed to bring fewer SEP events. But to their surprise, there was a caveat: Although fewer, the SEP events appeared to be far more intense. The worst time for SEPs appeared to be at times of "middling" solar activity—precisely the transition period we are thought to be entering. The results were published last month in Geophysical Research Letters..."
Putin Once More Moves to Assume Top Job in Russia
|12:40:18 AM, Tuesday, September 27, 2011|
"MOSCOW — Prime Minister Vladimir V. Putin, who transformed post-Soviet Russia by imposing Kremlin control over most aspects of public life, moved on Saturday to return to the presidency and could remain until 2024, giving him a rule comparable in length with that of Brezhnev or Stalin.
President Dmitri A. Medvedev announced at a party convention in Moscow that he would step aside for Mr. Putin, who served as president from 2000 to 2008 but was limited by the Constitution to two consecutive terms. Mr. Medvedev is to take his place as prime minister after presidential elections in March that Mr. Putin is assured of winning.
At the announcement, wave upon wave of applause washed over the hall, where 11,000 members of Mr. Putin’s party, United Russia, had gathered. Mr. Medvedev’s face was projected on a giant screen above the stage, and he gave a flickering smile as the crowd roared, rose and swung its attention away from him toward Mr. Putin, who was sitting in the audience.
The move brings an end to years of uncertainty, inside and outside Russia, about whether Mr. Putin intended to loosen his grip on power. Neither leader offered any reason for the decision, but Mr. Putin said the deal had been made years ago. If that is true, Mr. Medvedev’s presidency, and the tension that accompanied its end, now looks like an orchestrated political drama that drew in much of the world.
“I want to say directly: An agreement over what to do in the future was reached between us several years ago,” Mr. Putin said. Mr. Medvedev also said there had been no conflict, though his account was less definitive.
“What we are recommending to the convention, it is a deeply thought-out decision,” Mr. Medvedev said. “Moreover, we really discussed this possible turn of events at the time when we formed our comradely union.”
The change casts uncertainty on the future of the so-called reset in relations between the United States and Russia, which benefited from an easy rapport between Mr. Medvedev and President Obama. But a senior Obama administration official played down such concerns on Saturday, saying that American officials “have very deliberately sought to avoid playing favorites.”
“Everyone knows that Putin runs Russia,” the official said, speaking on condition of anonymity. “Remembering this obvious fact means that Putin has supported the reset with the U.S.”
As the news filtered into the street, most Russians expressed little surprise. Mr. Putin’s rise to power accompanied an oil-fueled rise in income, and most Russians feel no nostalgia for the chaotic political pluralism of the 1990s. Opposition to Mr. Putin’s government is growing, however, in places like Moscow, whose residents get information from the Internet and are less dependent on government social payments..."
DMANLT.COM is back!
|11:59:59 PM, Monday, September 26, 2011|
I’m still testing that everything is working correctly, but it would appear we are back in business! Sorry for all the dead links and outdated home page!!! My web host let me down pretty hard this Friday, here is the reply I received from them after trying to update my site and realized everything was reset back to 8/16/2011:
“This morning (9/23/2011) the system experienced a hard drive raid failure. The raid was recovered within 60 minutes of failure. Unfortunately, the raid failure caused some loss of data from the past few weeks. We are recovering our disaster backup from the morning of 9/22/2011 to a secondary location. We will then process a differential comparison of the recovered data and the current live data. This will result in recently created or updated data recovering to your live website. We are unable to recover any file changes / updates that occurred after 9/22/2011 2:00 AM Eastern (GMT-4). We anticipate the file recovery and differential comparison to complete within a 48 hour time frame.”
So, yes, some of the posts are gone, including the ones about the NASA satellite crash and the latest discoveries concerning neutrinos at CERN!!! I might re-post some of them, but I will also just pick up where I left off and start posting new content.
Time to invest in a nice FTP and start scheduling daily back-ups! =/
Scientists Turn Back the Clock on Adult Stem Cells Aging
|1:54:59 AM, Thursday, September 22, 2011|
"Researchers have shown they can reverse the aging process for human adult stem cells, which are responsible for helping old or damaged tissues regenerate. The findings could lead to medical treatments that may repair a host of ailments that occur because of tissue damage as people age. A research group led by the Buck Institute for Research on Aging and the Georgia Institute of Technology conducted the study in cell culture, which appears in the September 1, 2011 edition of the journal Cell Cycle
The regenerative power of tissues and organs declines as we age. The modern day stem cell hypothesis of aging suggests that living organisms are as old as are its tissue specific or adult stem cells. Therefore, an understanding of the molecules and processes that enable human adult stem cells to initiate self-renewal and to divide, proliferate and then differentiate in order to rejuvenate damaged tissue might be the key to regenerative medicine and an eventual cure for many age-related diseases. A research group led by the Buck Institute for Research on Aging in collaboration with the Georgia Institute of Technology, conducted the study that pinpoints what is going wrong with the biological clock underlying the limited division of human adult stem cells as they age.
"We demonstrated that we were able to reverse the process of aging for human adult stem cells by intervening with the activity of non-protein coding RNAs originated from genomic regions once dismissed as non-functional 'genomic junk'," said Victoria Lunyak, associate professor at the Buck Institute for Research on Aging.
Adult stem cells are important because they help keep human tissues healthy by replacing cells that have gotten old or damaged. They're also multipotent, which means that an adult stem cell can grow and replace any number of body cells in the tissue or organ they belong to. However, just as the cells in the liver, or any other organ, can get damaged over time, adult stem cells undergo age-related damage. And when this happens, the body can't replace damaged tissue as well as it once could, leading to a host of diseases and conditions. But if scientists can find a way to keep these adult stem cells young, they could possibly use these cells to repair damaged heart tissue after a heart attack; heal wounds; correct metabolic syndromes; produce insulin for patients with type 1 diabetes; cure arthritis and osteoporosis and regenerate bone.
The team began by hypothesizing that DNA damage in the genome of adult stem cells would look very different from age-related damage occurring in regular body cells. They thought so because body cells are known to experience a shortening of the caps found at the ends of chromosomes, known as telomeres. But adult stem cells are known to maintain their telomeres. Much of the damage in aging is widely thought to be a result of losing telomeres. So there must be different mechanisms at play that are key to explaining how aging occurs in these adult stem cells, they thought.
Researchers used adult stem cells from humans and combined experimental techniques with computational approaches to study the changes in the genome associated with aging. They compared freshly isolated human adult stem cells from young individuals, which can self-renew, to cells from the same individuals that were subjected to prolonged passaging in culture. This accelerated model of adult stem cell aging exhausts the regenerative capacity of the adult stem cells. Researchers looked at the changes in genomic sites that accumulate DNA damage in both groups.
"We found the majority of DNA damage and associated chromatin changes that occurred with adult stem cell aging were due to parts of the genome known as retrotransposons," said King Jordan, associate professor in the School of Biology at Georgia Tech..."
Biologists Discover Genes That Repair Nerves After Injury
|1:32:40 AM, Thursday, September 22, 2011|
"Biologists at the University of California, San Diego have identified more than 70 genes that play a role in regenerating nerves after injury, providing biomedical researchers with a valuable set of genetic leads for use in developing therapies to repair spinal cord injuries and other common kinds of nerve damage such as stroke.
In the September 22 issue of the journal Neuron, the scientists detail their discoveries after an exhaustive two-year investigation of 654 genes suspected to be involved in regulating the growth of axons -- the thread-like extensions of nerve cells that transmit electrical impulses to other nerve cells. From their large-scale genetic screen, the researchers identified 70 genes that promote axon growth after injury and six more genes that repress the re-growth of axons.
"We don't know much about how axons re-grow after they're damaged," said Andrew Chisholm, a professor of biology at UC San Diego. "When you have an injury to your spinal cord or you have a stroke you cause a lot of damage to your axons. And in your brain or spinal cord, regeneration is very inefficient. That's why spinal cord injuries are basically untreatable."
Chisholm and UC San Diego biology professor and HHMI Investigator Yishi Jin headed the collaborative research team, which also included researchers from the University of Oregon.
While scientists in recent decades have gained a good understanding of how nerve cells, or neurons, develop their connections in the developing embryo, much less is known about how adult animals and humans repair -- or fail to repair -- those connections when axons are damaged.
"There are many processes not involved in early development that are involved in switching the neurons to this re-growth mode," said Chisholm. "In essence what we found are genes that people had not suspected previously to be part of this process."
Of particular interest to the UC San Diego biologists are the six genes that appear to repress the growth of axons.
"The discovery of these inhibitors is probably the most exciting finding," said Chisholm, because identifying and eliminating the inhibiting factors to the re-growth of axons could be just as essential as the biochemical pathways that promote axon re-growth in repairing spinal cord injuries and other kinds of nerve damage..."
Dash Berlin - Never Cry Again (Jorn Van Deynhoven Remix)
|1:21:10 AM, Thursday, September 22, 2011|
Lasers Could Be Used to Detect Roadside Bombs
|12:17:03 AM, Thursday, September 22, 2011|
"A research team at Michigan State University has developed a laser that could detect roadside bombs -- the deadliest enemy weapon encountered in Iraq and Afghanistan.
he laser, which has comparable output to a simple presentation pointer, potentially has the sensitivity and selectivity to canvas large areas and detect improvised explosive devices -- weapons that account for around 60 percent of coalition soldiers' deaths. Marcos Dantus, chemistry professor and founder of BioPhotonic Solutions, led the team and has published the results in the current issue of Applied Physics Letters.
The detection of IEDs in the field is extremely important and challenging because the environment introduces a large number of chemical compounds that mask the select few molecules that one is trying to detect, Dantus said.
"Having molecular structure sensitivity is critical for identifying explosives and avoiding unnecessary evacuation of buildings and closing roads due to false alarms," he said.
Since IEDs can be found in populated areas, the methods to detect these weapons must be nondestructive. They also must be able to distinguish explosives from vast arrays of similar compounds that can be found in urban environments. Dantus' latest laser can make these distinctions even for quantities as small as a fraction of a billionth of a gram.
The laser beam combines short pulses that kick the molecules and make them vibrate, as well as long pulses that are used to "listen" and identify the different "chords." The chords include different vibrational frequencies that uniquely identify every molecule, much like a fingerprint. The high-sensitivity laser can work in tandem with cameras and allows users to scan questionable areas from a safe distance.
"The laser and the method we've developed were originally intended for microscopes, but we were able to adapt and broaden its use to demonstrate its effectiveness for standoff detection of explosives," said Dantus, who hopes to net additional funding to take this laser from the lab and into the field.
This research is funded in part by the Department of Homeland Security. BioPhotonic Solutions is a high-tech company Dantus launched in 2003 to commercialize technology invented in a spinoff from his research group at MSU..."
Bionic Bacteria May Help Fight Disease and Global Warming
|12:03:31 AM, Thursday, September 22, 2011|
"A strain of genetically enhanced bacteria developed by researchers at the Salk Institute for Biological Studies may pave the way for new synthetic drugs and new ways of manufacturing medicines and biofuels, according to a paper published September 18 in Nature Chemical Biology.
For the first time, the scientists were able to create bacteria capable of effectively incorporating "unnatural" amino acids - artificial additions to the 20 naturally occurring amino acids used as biological building blocks - into proteins at multiple sites. This ability may provide a powerful new tool for the study of biological processes and for engineering bacteria that produce new types of synthetic chemicals.
"This provides us with a lot more room to think about what we can do with protein synthesis," said Lei Wang, assistant professor in Salk's Chemical Biology and Proteomics Laboratory and holder of the Frederick B. Rentschler Developmental Chair. "It opens up new possibilities, from creating drugs that last longer in the blood stream to manufacturing chemicals in a more environmentally friendly manner."
In 2001, Wang and his colleagues were the first to create bacteria that incorporated unnatural amino acids (Uaas) into proteins, and, in 2007, they first used the technique in mammalian cells. They did this by creating an "expanded genetic code," overriding the genetic code of the cells and instructing them to use the artificial amino acids in the construction of proteins.
The addition of Uaas changes the chemical properties of proteins, promising new ways to use proteins in research, drug development and chemical manufacturing.
For instance, Wang and his colleagues have inserted Uaas that will glow under a microscope when exposed to certain colors of light. Because proteins serve as the basis for a wide range of cellular functions, the ability to visualize this machinery operating in live cells and in real time helps scientists decipher a wide range of biological mechanisms, including those involved in the development of disease and aging..."
Ojai Valley Taxidermy, Chuck Testa, Expert Taxidermist
|11:46:07 PM, Wednesday, September 21, 2011|
-- Ojai Valley Taxidermy just got a huge boost thanks to this hilarious commercial made by Commercial Kings Rhett and Link.
Rider in the Storm: Since 9/11, Afghanistan's National Sport of Buzkashi Has Become as Complicated as the Country Itself
|10:59:02 PM, Wednesday, September 21, 2011|
"There aren't a lot of bats, balls or rackets in northern Afghanistan. There are goats, horses, men and dusty plains, and they have been there ever since Genghis Khan and his Mongol horde swept into the neighborhood in the 13th century. Their game, then, is simple. Men on horseback grab a goat from a chalk circle, carry it around a pole and drop it into another circle. No downs, innings, line judges or refs. Sometimes there are teams, and sometimes there aren't. Sometimes the field is 200 meters by 200 meters, and sometimes it isn't. And the goat? The goat might be a calf, but it's always dead, just lying there with its head and hooves cut off.
Grab the goat, bring it around the pole and put it in the circle. That's buzkashi.
The game sounds simple until you hang out with Mohammad Hasan Palwan. "Palwan" means strongman in Dari, the Persian language of Afghanistan. That's what people call him. The strongman. For a strongman, he's hardly big like American athletes, not like Ndamukong Suh or Blake Griffin. He's tall and wiry with brown-green eyes and a neat mustache. For an athlete at the top of his game, he's old -- maybe 42 or 43. He's not sure because he doesn't know his birthday. His hands, though, are giant and covered with a thousand small scars. His fingers are crooked, knobby and gnarled, like a pair of moving ginseng roots. Palwan has broken them all. And his ribs. And his arms. And his legs. And his jaw.
Palwan is one of buzkashi's great "chapandazan" -- the men who play Afghanistan's national sport, men who have been riding horses since they were boys, just like their fathers and grandfathers and great-grandfathers forever back in time. In Mazar-e Sharif, the sport's heartland located 200 miles north of Kabul, Palwan has been the champion 11 times -- four short of his father, who is regarded as the best chapandaz ever. Is Palwan the best in the country? It's hard to say. There is no Super Bowl or Stanley Cup that decides these things.
Buzkashi is played on Friday afternoons from November through February or so. I saw my first match in December 2008 in a barren field on the edge of Mazar. Musicians in turbans wailed as hash wafted over a crowd of thousands of men watching from the sidelines. (Women do not attend.) There were no tickets or uniforms, and anybody could play. That day, more than 100 horsemen wearing Soviet-era tank helmets and hand-worked, knee-high leather boots fought leg to leg in a scrum of horseflesh and cracking whips to pick up a headless goat weighing 150 pounds from the backs of their 1,100-pound stallions. Horses reared, men whipped each other, and spectators fled when the action got too close. Horse owners in the audience offered prizes for the victors: It could be $20; it could be $3,000; it could be a horse or a car. Egos often take over, and the pots become enormous. Palwan remembers riding home from a match 20 years ago with $17,000, earrings for his wife, two camels and five AK-47s.
The game is a microcosm of the country, a tangled web of patronage and allegiances, of great wealth, chaos and brutality. It is anything but simple.
"It is," says Palwan, "war."
And like all recent wars in Afghanistan, buzkashi is riding a wave of U.S. dollars. America has poured roughly $100 billion per year into the country since the fall of the Taliban in 2001. That money has flowed through the land like water through a sieve, making a number of tribal big men rich in the process. It's fair to say that nothing happens in the regions they control without their collusion, knowledge or profit. And they've found more than a few ways to profit. Some of their money has come from legitimate enterprises -- providing U.S. military and NATO subcontractors protection through dangerous mountain passes, for instance, as documented in a 2010 Senate report -- but plenty more allegedly comes from drug-running and illegitimate kickbacks. While Afghanistan's national pastime receives no financial support from any official U.S. programs, the influx of so many billions of American dollars has indirectly pumped new energy into this medieval sport..."
Kindergartner Shows Mother's Drug Pipe and Crystal Meth in School
|10:24:01 PM, Wednesday, September 21, 2011|
"Sweet Springs - Here's a shocking show-and-tell session in a Missouri kindergarten class. A six-year old boy took his teacher's instructions to bring important family items into school too literally when he whipped out his mother's crack pipe and illegal drugs.
Students at the Sweet Springs elementary school had been asked by their teacher to bring in important family items for a show and tell event. One six-year old boy decided to bring that which was nearest and dearest to his mother - her crack pipe and several baggies filled with crystal meth. Court documents reveal the the drugs are worth about $3,700.
Local KCTV-5 reports that worried and shocked school officials contacted the police who then executed a search warrant at the mother's home. Court records indicate that a search warrant was executed and a police dog named "Boomer" found a crack pipe. The mother, 32-year old Michelle Marie Cheatham was charged Monday, Sept. 12, with class C felony possession of a controlled substance and with class C felony endangering the welfare of a child.
The Marshall Democrat-News reports that both charges include the same range of punishment. If convicted, Cheatham could face up to seven years in the Missouri Department of Corrections or up to one year in the county jail and/or up to a $5,000 fine.
The crystals that had been brought into school by the child tested positive for methamphetamine. Police Chief Richard Downing told KCTV-5 that the incident marked a first in his law enforcement career.
The circumstances of the arrest have worried neighbors. One resident of the small town said,
"That kind of makes you wonder why parents would leave something like that out for a child to get a hold of."
A family friend says Cheatham's life took a downturn after her husband died earlier this year in a car crash and she received a large military pension. The pension enabled her to post the $7,500 bail, and she was then hospitalized because of complications from an earlier gastrointestinal surgery. The friend says the boy is now being cared for by loved ones..."
Italian Sparrow Joins Family as a New Species
|12:50:41 AM, Wednesday, September 21, 2011|
"Scientists in Norway say they have conclusive genetic evidence that sparrows recently evolved a third species.
The Italian sparrow, they argue, is a cross between the ubiquitous house sparrow and the Spanish sparrow.
Whether it is a distinct species has been the subject of a long scientific debate.
The Oslo team say in the journal Molecular Ecology that their evidence resolves the question.
Many bird-watching guides already identify the Italian sparrow as a separate species.
But this study, led by evolutionary biologist Glenn-Peter Saetre from the University of Oslo, is a genetic snapshot that appears to settle the debate.
The researchers studied populations of Italian and Spanish sparrows that share the same habitat in the south-east of Italy.
They took blood samples from the birds in order to extract DNA.
"By examining the genetics, we have shown conclusively that the Italian sparrow is of mixed origin - it is a hybrid of the house sparrow and the Spanish sparrow," Dr Saetre told BBC Nature.
"Second, and perhaps equally important - it is not reproducing with the Spanish sparrow, even though the two birds live side-by-side."
If the birds had been breeding, the scientists say that they would have found genetic "intermediates" - birds with genes from both species..."
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