Invading black holes cause ‘cosmic flashes’

Washington, September 19 (ANI): Mathematicians at the University of Leeds, UK, have determined that cosmic flashes, known as gamma ray bursts, are produced by jets of plasma that originate from invading black holes.

Gamma ray bursts are beams of high-energy radiation that are similar to the radiation emitted by explosions of nuclear weapons.

The orthodox model for this cosmic jet engine involves plasma being heated by neutrinos in a disk of matter that forms around a black hole, which is created when a star collapses.

But, mathematicians at the University of Leeds, have come up with a different explanation: the jets come directly from black holes, which can dive into nearby massive stars and devour them.

Their theory is based on recent observations by the Swift satellite, which indicates that the central jet engine operates for up to 10,000 seconds – much longer than the neutrino model can explain.

Mathematicians believe that this is evidence for an electromagnetic origin of the jets, that is, that the jets come directly from a rotating black hole, and that it is the magnetic stresses caused by the rotation that focus and accelerate the jet’s flow.

For the mechanism to operate, the collapsing star has to be rotating extremely rapidly.

This increases the duration of the star’s collapse as the gravity is opposed by strong centrifugal forces.

One particularly peculiar way of creating the right conditions involves not a collapsing star, but a star invaded by its black hole companion in a binary system.

The black hole acts like a parasite, diving into the normal star, spinning it with gravitational forces on its way to the star’s centre, and finally eating it from the inside.

“The neutrino model cannot explain very long gamma ray bursts and the Swift observations, as the rate at which the black hole swallows the star becomes rather low quite quickly, rendering the neutrino mechanism inefficient, but the magnetic mechanism can,” said Professor Komissarov from the School of Mathematics at the University of Leeds.

“Our knowledge of the amount of the matter that collects around the black hole and the rotation speed of the star allow us to calculate how long these long flashes will be – and the results correlate very well with observations from satellites,” he added. (ANI)

Mystery of odd rotating stars solved by scientists

Washington, September 18 (ANI): A team of scientists has solved a longstanding mystery about a pair of stars called DI Herculis whose peculiar rotation had remained a mystery for three decades.

The shift in the orbit of DI Herculis was a mystery till now.

Now, MIT (Massachusetts Institute Of Technology) researchers and colleagues have determined that the stars are rotating tipped over on their sides, relative to their orbits around each other.

This produces tidal effects that counteract the expected rate for the orbits to shift orientation over time (called precession), finally explaining the mysterious anomaly.

The discrepancy in the rate of precession had been seen as a possible refutation of Einstein’s theory of relativity, so finding a conventional explanation means that relativity has withstood another possible challenge.

This discovery could also help to shed light on how binary stars (about half of all known stars) are formed and how their rotation and orbits evolve over time.

The mystery was solved by postdoctoral researcher Simon Albrecht and assistant professor of physics Joshua Winn and others, who used a high-resolution spectrograph called Sophie on a 1.93-meter telescope at the Observatoire de Haute-Provence in France to make highly detailed observations that revealed the unexpected tilt – one of more than 70 degrees from vertical, the other more than 80 degrees – of the stars’ rotation axes.

The team now hopes to study other unusual binary stars to try to determine how unusual this tipped-over configuration is. (ANI)

Scientists find meteorite that came from innermost asteroid belt between Mars and Jupiter

Washington, September 18 (ANI): In a very rare finding, scientists have discovered an unusual kind of meteorite in the Western Australian desert and have uncovered that it came from the innermost main asteroid belt between Mars and Jupiter.

Meteorites are the only surviving physical record of the formation of our Solar System.

However, information about where individual meteorites originated, and how they were moving around the Solar System prior to falling to Earth, is available for only a dozen of around 1100 documented meteorite falls over the past two hundred years.

According to Dr Phil Bland from the Department of Earth Science and Engineering at Imperial College London, the lead author of the study, “We are incredibly excited about our new finding. Meteorites are the most analysed rocks on Earth, but it’s really rare for us to be able to tell where they came from.”

The new meteorite, which is about the size of cricket ball, is the first to be retrieved since researchers from Imperial College London, Ondrejov Observatory in the Czech Republic, and the Western Australian Museum, set up a trial network of cameras in the Nullarbor Desert in Western Australia in 2006.

The researchers aim to use these cameras to find new meteorites, and work out where in the Solar System they came from, by tracking the fireballs that they form in the sky.

The new meteorite was found on the first day of searching using the new network, by the first search expedition, within 100m of the predicted site of the fall.

The meteorite appears to have been following an unusual orbit, or path around the Sun, prior to falling to Earth in July 2007, according to the researchers’ calculations.

The team believes that it started out as part of an asteroid in the innermost main asteroid belt between Mars and Jupiter.

It then gradually evolved into an orbit around the Sun that was very similar to Earth’s.

The new meteorite is also unusual because it is composed of a rare type of basaltic igneous rock.

According to the researchers, its composition, together with the data about where the meteorite comes from, fits with a recent theory about how the building blocks for the terrestrial planets were formed.

This theory suggests that the igneous parent asteroids for meteorites like today’s formed deep in the inner Solar System, before being scattered out into the main asteroid belt.

Asteroids are widely believed to be the building blocks for planets like the Earth, so the new finding provides another clue about the origins of the Solar System. (ANI)

Scientists map melting history of Greenland’s ice sheet

Washington, September 17 (ANI): Researchers from the Niels Bohr Institute at the University of Copenhagen have mapped the history of the melting of the Greenland ice sheet.

Numerous drillings have been made through both Greenland’s ice sheet and small ice caps near the coast.

By analyzing every single annual layer in the kilometres long ice cores, researchers can get detailed information about the climate of the past.

But now, the Danish researcher Bo Vinther and colleagues from the Centre for Ice and Climate at the Niels Bohr Institute, University of Copenhagen, in collaboration with researchers from Canada, France and Russia, have found an entirely new way of interpreting the information from the ice core drillings.

“Ice cores from different drillings show different climate histories. This could be because they were drilled at very different places on and near Greenland, but it could also be due to changes in the elevation of the ice sheet, because the elevation itself causes different temperatures,” explained Bo Vinther about the theory.

Today, the ice sheet is more than three kilometres thick at its highest point and thinning out towards the coast.

Four of the drillings analyzed are from the central ice sheet, while two of the drillings are from small ice caps outside of the ice sheet itself.

By comparing the Oxygen-18 content in all of the annual layers from the four drillings through the ice sheet with the Oxygen-18 content of the same annual layers in the small ice caps, Bo Vinther has calculated the elevation course through 11,700 years.

Just after the ice age the elevation of the ice sheet rose slightly because when the climate transitions from ice age to warm age, there is a rapid increase in precipitation.

But at the same time, the areas lying near the coast begin to decrease in size, because the ice is melting at the edge.

When the ice melts at the edge, it slowly causes the entire ice sheet to ‘collapse’ and become lower.

The calculations show that in the course of about 3,000 years, the elevation changed and became up to 600 meters lower in the coastal areas.

But in the middle, it was a slow process, where the elevation decreased around 150 meters in the course of around 6,000 years.

It then stabilized.

The new results show the evolution of elevation of the ice sheet throughout 11,700 years and they show that the ice sheet is very sensitive to the temperature.

The results can be used to make new calculations for models predicting future consequences of climate changes. (ANI)

Scientists unravel chemistry of Titan’s hazy atmosphere

Washington, September 16 (ANI): In a new research, a team of scientists has unraveled the chemical evolution of the orange-brownish colored atmosphere of Saturn’s moon Titan, the only solar system body besides Venus and Earth with a solid surface and thick atmosphere.

Scientists at University of Hawai’i at Manoa carried out the research.

The UH Manoa team, including Xibin Gu and Seol Kim, conducted simulation experiments mimicking the chemical reactions in Titan’s atmosphere utilizing crossed molecular beams in which the consequence of a single collision between molecules can be followed.

The team’s experiments indicate that triacetylene can be formed by a single collision of a “radical” ethynyl molecule and a diacetylene molecule.

An ethynyl radical is produced in Titan’s atmosphere by the photodissociation of acetylene by ultraviolet light.

Photodissociation is a process in which a chemical compound is broken down by photons.

“Surprisingly, the photochemical models show inconsistent mechanisms for the production of polyynes,” said Kaiser, who is the principal investigator of this study.

The mechanism involved in the formation of triacetylene, was also confirmed by accompanying theoretical calculations by Alexander Mebel, a theoretical chemist at Florida International University.

These theoretical computations also provide the 3D distribution of electrons in atoms and thus the overall energy level of a molecule.

To apply these findings to the real atmosphere of Titan, Danie Liang and Yuk Yung, planetary scientists at Taiwan’s Academia Sinica and California Institute of Technology (Caltech), respectively, performed photochemical modeling studies of Titan’s atmosphere.

All data together suggest that triacetylene may serve as a building block to form more complex and longer polyynes and produce potential precursors for the aerosol-based layers of haze surrounding Titan.

The study demonstrated for the first time that a sensible combination of laboratory simulation experiments with theory and modeling studies can shed light on decade old unsolved problems crucial to understand the origin and chemical evolution of the solar system.

The researchers hope to unravel next the mystery of the missing ethane lakes on Titan – postulated to exist for half a century, but not detected conclusively within the framework of the Cassini-Huygens mission.

In the future, the UH Manoa team will combine the research results with terrestrial-based observations of Titan’s atmosphere. (ANI)

Now, computers become lawyers!

Washington, September 13 (ANI): European researchers have created a legal analysis query engine that combines artificial intelligence, game theory and semantics to offer advice, conflict prevention and dispute settlement for European law.

European law is complex, many layered and expanding. There are thousands of regulations, so many that compliance is difficult, time-consuming and expensive.

While harmonization is underway, the process itself demands that individuals, companies and law firms often have to relearn the system.

Meanwhile, areas like intellectual property rights (IPR) and digital rights regulation that seek to combat piracy are becoming evermore complex to understand and apply consistently across Europe.

Now, the ALIS Project has developed a computerized platform that uses artificial intelligence (AI), game theory and semantic technologies to ‘understand’ and track the regulations in a large, and expanding area of expertise – in this case IPR.

ALIS sought to develop a working system in IPR to tackle the fundamental technological challenges before expanding it to more areas later on.

The system is much more than a simple database of relevant legal regulations.

It uses insights from game theory to help contentious parties come to an amicable agreement, either through conflict prevention or dispute resolution, and it can assist lawmaking as well.

Game theory looks at how strategic interactions between rational people lead to outcomes reflecting real player preferences.

It can be used to develop algorithms that find equilibria in games, markets, computational auctions, peer-to-peer systems, security and information markets.

Now, with ALIS, it is available for legal systems too.

This concept of equilibria supports conflict prevention, dispute resolution and offers decision support for lawmaking.

A key factor in the system is its test for regulatory compliance.

This is very powerful. It can help citizens, companies and lawyers quickly scan the relevant legal corpus to discover if they are compliant. It is a key factor for the other roles in the ALIS system as well.

For conflict prevention, dispute resolution and lawmaking, the ALIS first establishes if the parties, or the proposed legislation, are compliant with current law.

Once compliance is established, the system can present a series of options based on an analysis of the potential conflict or dispute, or it can provide information to further assist lawmakers to formulate policy.

Similarly, the tool aims to rapidly speed up the work done by lawyers, helping to resolve relatively straightforward cases faster, so they can concentrate on more complex problems. (ANI)

Cabinet approves recognition of ancient Sowa-Rigpa medical system

New Delhi, Sep 10 (ANI): The Union Cabinet today approved the Indian Medicine Central Council (Amendment) Bill, 2009 for amending the Indian Medicine Central Council Act, 1970.

“Sowa-Rigpa” commonly known as ‘Amchi’ is one of the oldest surviving system of medicine in the world, popular in the Himalayan region of India. In India this system is practiced in Sikkim, Arunachal Pradesh, Darjeeling (West Bengal), Lahoul and Spiti (Himachal Pradesh) and Ladakh region of Jammu and Kashmir.

The theory and practices of “Sowa-Rigpa” are similar to Ayurveda, and also include few principles of Traditional Chinese Medicine. The fundamental text book rgyud-bzi of “Sowa-Rigpa” is believed to have been taught by Buddha himself and is closely linked with Buddhist philosophy. he Government of India has received representations from various quarters to grant recognition to the System of “Sowa-Rigpa” to enable it get a legal status.

To confer legal status to “Sowa-Rigpa” amendments to section 2,3,8,9 and 17 of the Indian Medicine Central Council Act 1970, need to be carried out.

The proposed amendments shall give effect to the inclusion of “Sowa-Rigpa” under sections 2,3,8,9 and 17 of the Indian Medicine Central Council Act, 1970 thereby recognizing this system legally.

It is expected that the legal recognition of “Sowa-Rigpa” will lead to the protection and preservation of this ancient system of medicine and will help in its propagation and development. This will also open new vistas leading to collaborative research and scientific validation of the “Sowa-Rigpa” system, besides conservation and protection of the medicinal plants/minerals used in the system.

The recognition of “Sowa-Rigpa” will also lead to the setting up of a mechanism to regulate the education and practice of “Sowa-Rigpa”. (ANI)

Song birds have to deal with cover artists too

Washington, Sep 9 (ANI): Just like great singers among humans, birds too have to deal with cover artists who copy songs.

A new research has revealed that some bird species have evolved to sing the same tune as their rivals, in order to compete effectively.

Led by Dr. Joseph Tobias and Dr Nathalie Seddon from the Edward Grey Institute, University of Oxford, the research team analysed the calls and songs of two antbird species that were living side-by-side in the Amazon rainforest- the Peruvian warbling-antbird and the yellow-breasted warbling-antbird.

The study was aimed at investigating their similar songs, and, in particular, at testing the theory that the birds’ songs could become increasingly similar to enable effective communication between competing species.

The above notion has attracted controversy as many scientists have argued that convergence in territorial or mating signals results in needless confrontation or crossbreeding and the creation of hybrids.

“Biologists have long been fascinated by convergence in ecological traits as it offers tangible evidence of evolution and the forces of selection by which it operates, but until now there is no clear evidence that social competition between animal species can produce convergent signals. We examined this idea by analysing the structure and function of songs in two birds which we knew to be strong social competitors,” said Tobias.

The researchers studied the species in Peru and Bolivia at one site where they lived together, and two sites where they lived in isolation.

Firstly, they recorded three sets of signals-songs, calls, and plumage colour of both species (including a total of 504 songs from 150 individuals).

Later, they played them back to individuals of each species to test the significance of songs of both types.

The results showed that territorial songs of both species were extremely similar particularly where they lived together, such that territorial birds treated songs of both species as equally threatening.

In the meantime, they discovered that non-territorial signals like calls and plumage were highly divergent.

“In effect, the territorial songs of these birds are more or less interchangeable in design and function. Given that they last shared a common ancestor more than 3 million years ago, it is almost equivalent to humans and chimpanzees – which diverged around 5 million years ago – using the same language to settle disputes over resources” said Tobias.

“Our results provide the first compelling evidence that social interaction can cause convergent evolution in species competing for space and resources.

They also suggest that while competition drives convergence in territorial songs, this is offset by divergence in non-competitive signals such as plumage colour to promote species recognition and reduce the chance of interbreeding,” he added.

The study has been published in Evolution.(ANI)

Smart people are sexier

Wellington, Sep 2 (ANI): A person’s sex quotient lies in his or her brain, according to a study that suggests that being smart is sexy, and the smartest males get the most partners.

Through a study on Australian birds, a team of researchers have lent support to the idea that our big human brain evolved because it is a sexually attractive organ, not just a useful one.

According to the above theory, signs of intelligence – such as creating art, music, and humour – could have made the brainiest people luckiest in love.

The theory was hugely discussed in the book ‘The Mating Mind’ by an evolutionary psychologist, Geoffrey Miller, almost a decade ago.

Jason Keagy, of the University of Maryland in the US, said that testing the theory in humans was very difficult, and thus he chose to observe satin bowerbirds at Wallaby Creek in NSW instead.

He claimed that Bowerbirds are intelligent.

“But they’re not as complex as humans,” Stuff.co.nz quoted him as saying.

Keagy could get an accurate record of the male birds’ sexual success by videotaping their every movement.

“They can’t really lie to us,” he said.

Known for their fascination with blue objects, bowerbirds have a strong aversion to red.

In the first IQ test, the researchers placed three red objects under a clear plastic container in their bower, and found that the smartest males could remove the cover and carry away the offending objects in 20 seconds.

“It looks pretty simple, but some weren’t able to do it,” said Keagy.

In a second braintwister, he glued a red object down and observed that some bowerbirds kept on trying in vain to pull it out, while the brighter ones quickly twigged this was impossible and covered it with leaves.

The males who failed the plastic container test were spurned.

“No females were mating with them,” said Keagy.

However, the smartest birds attracted up to 20 female partners a season.

“This is the first evidence [in any species] that individuals with better problem-solving abilities are more sexually attractive,” he said.

He claimed that greater intelligence could allow male bowerbirds to woo more females because they can build more elaborate bowers, are better dancers or are more responsive to subtle cues from the females during courtship.

Alternative theories to the mating mind include that our large brain evolved because it was advantageous for hunting or living in social groups, and cultural creativity was simply a fortuitous by-product of the struggle to survive.

The study has been published in the journal Animal Behaviour. (ANI)

UCLA economist blames Hoover’s pro-labour policies for Great Depression

Washington, Aug 30 (ANI): A University of California, Los Angeles economist has blamed former US President Herbert Hoover’s pro-labour policies for Great Depression in 1929.

“These findings suggest that the recession was three times worse – at a minimum – than it would otherwise have been, because of Hoover,” said Lee E. Ohanian, a UCLA professor of economics.

The policies, which included both propping up wages and encouraging job-sharing, also accounted for more than two-thirds of the precipitous decline in hours worked in the manufacturing sector, which was much harder hit initially than the agricultural sector.

“By keeping industrial wages too high, Hoover sharply depressed employment beyond where it otherwise would have been, and that act drove down the overall gross national product,” said Ohanian.

“His policy was the single most important event in precipitating the Great Depression,” he added.

According to Ohanian, Hoover was concerned about two potential crises. He was afraid the stock market collapse of October 1929 would result in a recession with deflation, leading to dramatic wage cuts, as a period of deflation had done just a decade earlier.

And because of a series of recent legislative and court decisions that had expanded the power of organized labour, he also worried about the possibility of crippling strikes if such wage cuts were to come to pass.

“Hoover had the idea that if wages were kept high for workers and they shared jobs instead of being laid off, they would be able to buy more goods and services, which would help the economy improve,” Ohanian added.

After the crash, Hoover met with major leaders of industry and cut a deal with them to either maintain or raise wages and institute job-sharing to keep workers employed, at least to some degree. In response, General Motors, Ford, U.S. Steel, Dupont, International Harvester and many other large firms fell in line, even publicly underscoring their compliance with Hoover’s program.

Designed to placate labour and safeguard workers’ buying power, the step had an unintended effect. As deflation eventually did set in, the inflation-adjusted value of these wages rose over time, effectively giving workers a raise precisely at the time when companies were least in a position to afford such increases and precisely when productivity was beginning to fall.

“The wage freeze effectively raised the cost of labour and, by extension, production,” Ohanian said.

“If you artificially raise the price of production, your costs go way up and you pass them on to the customers, and they buy that much less,” he added.

Reluctant to lower wages due to Hoover’s entreaties, employers in the manufacturing sector responded by reducing the workweek and laying off workers. By September 1931, the manufacturing sector was already hurting: Hours clocked by workers had fallen by 20 percent and employment by 35 percent.

Overall, the economy suffered, with the GDP falling by 27 percent.

“The Depression was the first time in the history of the U.S. that wages did not fall during a period of significant deflation,” Ohanian said.

“In late 1931, industry finally did cut wages, but it was too late. By this point, the economy was in an unprecedented, full-blown depression,” he added.

The findings are slated to appear in the December issue of the peer-reviewed Journal of Economic Theory. (ANI)

Muthoot’s family alleges conspiracy behind murder

Thiruvananthapuram, Aug 29 (ANI): A week after Kerala business tycoon Paul Muthoot was found murdered, his family has refuted Kerala Police’s road rage claim saying that there’s something more creepy behind his death.

Jnanamma Thomas, Muthoot’s grandmother refuted Kerala police’s road rage angle, alleging a cover-up of a brutal murder of her grandson .

“They did not tell us there was an accident angle to it in the beginning. But only they told there was an accident,” she said.

George P Easo, a family member said, “Politicians are changing their statements every other day. We don’t know whom to believe.”

Earlier, Kerala Home Minister Kodiyeri Balakrishnan has dismissed opposition Congress charge that his son had links in connection with the recent murder of Muthoot group scion Paul M George.

Addressing a press conference here on Friday, Balakrishnan said, “My son (Beenish Kodiyeri) has no relation with the case whatsoever. The allegation that Beenish had connections with wanted gangsters was to create a ‘mystery’ over the case.”

Rejecting the charge that the Home Department was trying to interfere in the investigation process, he said a deliberate attempt was being made by vested interests to hamper the probe.

The government had nothing to hide in the case and was open to “any sort of investigation”, he added.

Balakrishnan also announced that a special investigation team had been constituted under the leadership of Inspector General of Police Vinson M. Paul to probe the murder of the Paul Muthoot George.

He said that the team was constituted as the inter-district ramifications of the case and deeper links would have to be probed in detail. The investigation would cover links of Muthoot George with goonda elements.

According to the police theory, a gang of nearly 22 men was behind the murder of Paul.

Paul was killed last Friday night on the Alappuzha-Changanassery road. A friend who was with him was injured and is in hospital; both were stabbed.

Paul, who was based in Delhi, had recently returned to Kerala to take charge of the leisure and hospitality arm. He was returning from an under-construction resort at Mararikulam when he was stabbed to death.

On Sunday, police arrested 12 persons, including notorious criminals, identified as Om Prakash and Rajesh. (ANI)

McCartney says death rumours led people to think he was an impostor

London, Aug 27 (ANI): Sir Paul McCartney has disclosed that people often checked him over to make sure he wasn’t an impostor after the circulation of a conspiracy theory which claimed he had died in the 1960s.

About 40 years ago rumours about the former Beatle’s death in a 1966 accident had gained currency and conspiracy theorists proved the death with clues appearing on the cover of The Beatles’ last recorded album Abbey Road.

The Telegraph quoted McCartney as saying: “I think the worst thing that happened was that I could see people sort of looking at me more closely – ‘were his ears always like that?”"

The story, which still remains a popular Google search, circulated in October 1969 after a Detroit DJ claimed the Beatles had recruited a McCartney look-alike William Campbell, after the bass player’s death.

The cover of Abbey Road featured a bare footed McCartney and many believed this to hint dropped by the Beatles that the fourth member of the band was not alive.

The act was said to be the representation of a funeral procession and a car’s number plate with ’28IF’ was believed to refer to McCartney’s age had he been alive.

McCartney told the October edition of Mojo magazine: “It was funny really, but ridiculous. It’s an occupational hazard – people make up a story, and then you find yourself having to deal with this fictitious stuff.”

The star even explained the clues: “I knew why I’d had bare feet – ‘cos I’d kicked off my sandals. I knew the car that said ’28IF’ was a completely random car that had just been parked. It was madness.”

The Beatles’ original studio albums and Abbey Road are scheduled to be re-released in a remastered version on September 9. (ANI)

Gene breakthrough could banish inherited diseases

London, Aug 26 (ANI): Researchers at Oregon Health and Science University’s Oregon National Primate Research Center (ONPRC) have developed a new technique that could banish a host of crippling inherited diseases forever.

The landmark research raises the prospect of wiping out diseases passed on from mothers to their children through mutated DNA in cell mitochondria.

“We believe this discovery in nonhuman primates can rapidly be translated into human therapies aimed at preventing inherited disorders passed from mothers to their children through the mitochondrial DNA, such as certain forms of cancer, diabetes, infertility, myopathies and neurodegenerative diseases,” said Shoukhrat Mitalipov, from Oregon Health and Science University (OHSU).

Mitochondria are structures that are found in all cells that provide energy for cell growth and metabolism, which is why they are often called the cell’s “power plant.”

The structures produce energy to power each individual cell. Mitochondria also carry their own genetic material.

When an egg cell is fertilized by a sperm cell during reproduction, the embryo almost exclusively inherits the maternal mitochondria present in the egg. This means that any disease-causing genetic mutations that a mother carries in her mitochondrial DNA can be passed on to her offspring.

OHSU researchers’ method transfers the mother’s chromosomes to a donated egg that has had its chromosomes removed, but which has healthy mitochondria, thereby preventing the disease from being passed on to one’s offspring.

During the research, scientists collected groups of unfertilized eggs from two female rhesus macaque monkeys (monkeys A and B). They then removed the chromosomes, which contain the genes found in the cell nucleus, from the eggs of monkey B, and then transplanted the nuclear genes from the eggs of monkey A into the eggs of monkey B.

Then the eggs from monkey B, which now contained their own mitochondria but monkey A’s nuclear genes, were fertilized. The fertilized eggs developed into embryos that were implanted in surrogate monkeys.

The initial implantation of two embryos resulted in the birth of healthy twin monkeys. These monkeys are the world’s first animals derived by spindle transfer.

Follow-up testing showed that there was little to no trace of cross-animal mitochondrial transfer using this procedure. This shows that the researchers were successful in isolating nuclear genetic material from mitochondrial genetic material during the transfer process.

“In theory, this research has demonstrated that it is possible to use this therapy in mothers carrying mitochondrial DNA diseases so that we can prevent those diseases from being passed on to their offspring,” Mitalipov said.

“We believe that with the proper governmental approvals, our work can rapidly be translated into clinical trials for humans, and, eventually, approved therapies,” Mitalipov added.

The research has been published in the Aug. 26 advance online edition of the journal Nature. (ANI)

Housewives ‘more likely to suffer from heart disease than working women’

London, Aug 26 (ANI): Housewives are at an increased risk of suffering from heart disease and strokes as compared to women who go to work, a new study has shown.

And experts blame the more sedentary lifestyles of ladies who stay at home, as they are more likely to smoke, be less educated, drink more, be overweight and suffer from depression – all contributory factors.

Now, in the latest study, researchers from the University of North Carolina studied 7,000 women aged 45 to 64 to see if there was a link between employment status, coronary heart diseases and strokes.

From analyses, they found that women employed outside the home had a lower risk. For heart disease, this link was stronger among women who did not have a high school education, reports The Daily Express.

The authors said: “One theory suggests that women with more roles, for example, family and employee roles, may have a better health profile than women with fewer roles, although the strength of this association may vary as the result of different levels of job demands and job control.

“Because of the fact that many women assume multiple roles as homemakers, primary caretakers for children and elderly parents, in addition to being employed outside of the home, the investigation of the health-employment relationship among women is complex.”

In the research, housewives were found to have a lower education level than employed women.

The study has been published in the journal Annals of Epidemiology. (ANI)

New model of quantum gravity may rewrite Einstein’s theory of general relativity

Washington, August 25 (ANI): Scientists at Texas A and M University in the US have developed a controversial new model of quantum gravity, which might reproduce Albert Einstein’s theory of general relativity.

The theory, which Einstein developed in the early 20th century, says that matter curves spacetime, and it is this curvature which deflects massive bodies – an effect that we interpret as the influence of gravity.

The theory has been tested to extremely high accuracy and without it, our satellite global positioning system would be off by about 10 km per day.

Despite the success of general relativity, one of the most important problems in modern physics is finding a theory of quantum gravity that reconciles the continuous nature of gravitational fields with the inherent ‘graininess’ of quantum mechanics.

Recently, Petr Horava at Lawrence Berkeley Lab proposed such a model for quantum gravity that has received widespread interest, in no small part because it is one of the few models that could be experimentally tested.

In Horava’s model, Lorentz symmetry, which says that physics is the same regardless of the reference frame, is violated at small distance scales, but remerges over longer distance scales

The team at Texas A and M, which includes Hong Lu, Jianwei Mei and Christopher Pope, report their investigations into how the modifications proposed in Horava’s theory will broadly affect the solutions of general relativity.

Lu and his team’s calculations suggest that Horava’s model only reproduces general relativity on unobservable scales, “larger than the size of the Universe”.

The research team’s paper is an important contribution to testing the Horava model and shows that a good deal of work remains to understand its full implications. (ANI)

Archaeologists to explore how prehistoric Italians made their living at end of the Ice Age

Washington, August 25 (ANI): Archaeologists at the University of Bradford are all set to lead an exploration into how prehistoric people made their living in Italy at the end of the Ice Age.

According to a report in Bradford Telegraph and Argus, the research aims to find out how hunter-gatherers in Mediterranean Europe survived before farming became widespread and why the transition to agriculture was a smooth one.

Researchers will use high-precision dating to accurately age occupation layers in archaeological cave sites and identify which animals were being hunted by the prehistoric people by studying bones found at sites. he team will also use isotope analyses to identify if the hunted animals migrated seasonally.

“This project brings together cutting edge scientific analyses and traditional archaeological approaches for understanding in the past,” said lead researcher Dr Randolph Donahue.

“It will assist us in explaining how and why people shifted smoothly towards adopting agriculture in Mediterranean Europe following its introduction from the Near East,” he added.

The work will include a study of the production and use of stone tools discarded at the sites to understand how prehistoric people were using the caves.

The results of these combined methods will evaluate which of two theories best explains the food procurement strategies of hunter-gatherers in Mediterranean Europe during the end of the Ice Age.

The first theory suggests prehistoric people followed herds of animals year round in order to hunt them for food while the second theory suggests people moved around the landscape far less by relying far more heavily on small animals, fish and plants.

The project involves more than 20 researchers at ten universities and research centres in the UK, Italy and Germany. (ANI)

Kerala businessman’s murder mystery solved, claims police

New Delhi, Aug. 24 (ANI): The murder case of Kerala businessman Paul Muthoot George has been solved, Kerala Police claimed on Monday.

According to the police theory, a gang of nearly 22 men was behind the murder of Paul, 30, who was heading the Muthoot M George Group’s hospitality business.

The hired man who stabbed Paul has not been arrested so far, police said

Paul was killed last Friday night on the Alappuzha-Changanassery road. A friend who was with him was injured and is in hospital; both were stabbed.

On Sunday, police arrested 12 persons, including notorious criminals, identified as Om Prakash and Rajesh.

A team led by the IGP, Ernakulam Range, Vinson Paul, is interrogating the suspects.

The Muthoot Group is a major player in the financial services business in Kerala and has been slowly expanding its reach to other parts of the country. Paul is the chairman’s second son.

Earlier, media reports had suggested business rivalry could be a reason. Involvement of persons related to the narcotics trade was also not being ruled out.

The dead man and his friend were found by the roadside on Friday night. The vehicle they were travelling in was missing. The vehicle, a Ford Endeavour, was found abandoned this morning at Kollam, 40 km away.

Paul, who was based in Delhi, had recently returned to Kerala to take charge of the leisure and hospitality arm.

He was returning from an under-construction resort at Mararikulam when he was stabbed to death.

Paul was Chairman M G George Muthoot’s second son, while his two brothers, George Muthoot George and Alexander George Muthoot, are also associated with the group as executive director and as a director, respectively.

In addition, four of Paul’s cousins are part of the fourth generation of Muthoot directors, who had been inducted into the group. (ANI)

Nizami urges Pak teachers to promote two-nation theory among kids

Lahore, Aug 24(ANI): Pakistani journalist and Chairman Nazria Pakistan Trust (NPT) Majid Nizami has urged teachers in Pakistan to indoctrinate the new generation with the idea that Hindus and Muslims belong to two separate nations.

Nizam said the practice could only be defended by the two-nation theory.

Addressing the eighth ideological workshop for teachers organised by the NPT in collaboration with Punjab Education Department here on Saturday, Nizami said that Pakistan was created and has survived due to its ideology.

“If we consider Muslims and Hindus one nation, then there cannot be any justification of Pakistan,” The Nation quoted Nizami, as saying.

“Hindus are idol worshippers and we are idol- killers and this is the difference,” he added.

Nizam further said that East Pakistan (now Bangladesh) was separated due to stupidity and expressed a desire to see it back again with Pakistan. (ANI)

Young animals better at keeping warm than previously believed

Washington, August 21 (ANI): A new study has found that young muskoxen conserve heat almost as well as adults, a finding that runs contrary to a longstanding assumption among scientists that young animals should be more vulnerable in extreme cold.

Biologist Adam Munn from the University of Sydney, Australia, carried out the study.

Surviving freezing winters is tough for any animal, but it is generally assumed to be tougher on the young.

Young animals theoretically should have a harder time holding heat because they have larger ratios of surface area to body volume, meaning more of their body mass is directly exposed to the cold.

That theory appeared to hold true for muskoxen-shaggy vegetarians that look a bit like buffalo, but are actually more closely related to sheep.

Scientists have previously reported high death rates for muskox calves during especially cold winters in their arctic habitats.

But, in measuring heat loss in adult and young muskoxen, Munn and his research team found that the cold itself might not be the culprit.

“To our surprise, we found that the smaller calves were not more thermally stressed than larger adults,” said Munn.

Munn and his team observed a population of muskoxen at the University of Alaska’s R.G. White Large Animal Research Facility in Fairbanks.

They used infrared sensing equipment to measure heat loss from the body surface of animals in contact with cold air and the frozen ground.

Munn tested the muskoxen during winter foraging, when the animals were the most directly exposed to the cold.

The researchers found that both calves and adults sacrificed only two to six percent of their daily energy intake to heat loss during foraging bouts, even when temperatures dipped to minus 50 Celsius (minus 58 Fahrenheit).

“This suggests that any thermoregulatory constraints associated with a small body size may not be as important for calf survival as previously thought,” Munn said.

“This is important because calf mortality in muskoxen and other large arctic herbivores has been variously linked with severe winters, which are expected to increase in number and severity with current climate trends,” he added.

“However, we present evidence that thermal costs per se may not be driving calf mortalities in muskoxen,” he said.

Muskoxen have a variety of ways to fight heat loss. They are insulated by thick fur called qiviut, and they likely have the ability to direct blood away from their extremities in cold weather. (ANI)

Why we sleep – ‘science-wise’

London, Aug 21 (ANI): From animals to humans, everybody requires a good night sleep. However, the function of sleep still remains one of the greatest unsolved mysteries of science, say researchers.

While many theories suggest that sleep helps in brain “maintenance” – including memory consolidation and pruning- reverse damage from oxidative stress suffered while awake and promote longevity, none of them are well established.

Now, researchers from University of California, Los Angeles have come up with a new theory that sleep’s primary function is to increase animals’ efficiency and minimize their risk by regulating the duration and timing of their behaviour.

“Sleep has normally been viewed as something negative for survival because sleeping animals may be vulnerable to predation and they can’t perform the behaviors that ensure survival,” Nature quoted Jerome Siegel, professor of psychiatry and director of the Centre for Sleep Research at the Semel Institute for Neuroscience and Human Behaviour at UCLA as saying,iegel said.

“These behaviours include eating, procreating, caring for family members, monitoring the environment for danger and scouting for prey.

“So it’s been thought that sleep must serve some as-yet unidentified physiological or neural function that can’t be accomplished when animals are awake,” he added.

In the study conducted using platypus, walrus, and echidna – a small, burrowing, egg-laying mammal covered in spines, the researchers showed that sleep itself is highly adaptive, much like the inactive states seen in a wide range of species, starting with plants and simple microorganisms; these species have dormant states – as opposed to sleep – even though in many cases they do not have nervous systems.

That challenges the idea that sleep is for the brain, said Siegel.

“We see sleep as lying on a continuum that ranges from these dormant states like torpor and hibernation, on to periods of continuous activity without any sleep, such as during migration, where birds can fly for days on end without stopping,” he said.

In humans, the most notable thing about sleep is that it reduces body and brain metabolism while still allowing high level of responsiveness to the environment, such as parent arousing at a baby’s whimper but sleeping through a thunderstorm.

“This Darwinian perspective can explain age-related changes in human sleep patterns as well,” said Siegel.

“We sleep more deeply when we are young, because we have a high metabolic rate that is greatly reduced during sleep, but also because there are people to protect us.

“Our sleep patterns change when we are older, though, because that metabolic rate reduces and we are now the ones doing the alerting and protecting from dangers,” the expert added.

The study appears in journal Nature Reviews Neuroscience. (ANI)