Science & TechnologyS


Fireball 5

Newly found asteroid to pass within moon's orbit on March 4, 2013

2013 EC
© Virtual TelescopeA newly found asteroid, 2013 EC can be seen in the lower left corner of the red box in this image. Screen capture from Virtual Telescope webcast on 3/3/2013.
A newly found asteroid will pass just inside the orbit of the Moon, with its closest approach on March 4, 2013 at 07:35 UTC. Named 2013 EC, the asteroid is about the size of the space rock that exploded over Russia two and a half weeks ago, somewhere between 10-17 meters wide (the Russian meteorite is estimated to be about 15 meters wide when it entered Earth's atmosphere). 2014 EC was discovered by the Mt. Lemmon Observatory in Arizona on March 2. . There is no chance this asteroid will hit Earth.

2013 EC will come within 396,000 kilometers from Earth, (246,000 miles, or around 1.0 lunar distances, 0.0026 AU.

The Moon's distance from the Earth varies between 363,104 km (225,622 miles) at perigee (closest) and 406,696 km (252,088 miles) at apogee (most distant point).

Nebula

Birth of a giant planet? Candidate protoplanet spotted inside its stellar womb

Planet birth
© ESO/L. CalçadaArtist's impression of a gas giant planet forming in the disc around the young star HD 100546. This system is also suspected to contain another large planet orbiting closer to the star. The newly-discovered object lies about 70 times further from its star than the Earth does from the Sun. This protoplanet is surrounded by a thick cloud of material so that, seen from this position, its star almost invisible and red in colour because of the scattering of light from the dust.

Astronomers using ESO's Very Large Telescope have obtained what is likely the first direct observation of a forming planet still embedded in a thick disc of gas and dust. If confirmed, this discovery will greatly improve our understanding of how planets form and allow astronomers to test the current theories against an observable target.

An international team led by Sascha Quanz (ETH Zurich, Switzerland) has studied the disc of gas and dust that surrounds the young star HD 100546, a relatively nearby neighbour located 335 light-years from Earth. They were surprised to find what seems to be a planet in the process of being formed, still embedded in the disc of material around the young star. The candidate planet would be a gas giant similar to Jupiter.

"So far, planet formation has mostly been a topic tackled by computer simulations," says Sascha Quanz. "If our discovery is indeed a forming planet, then for the first time scientists will be able to study the planet formation process and the interaction of a forming planet and its natal environment empirically at a very early stage."

HD 100546 is a well-studied object, and it has already been suggested that a giant planet orbits about six times further from the star than Earth is from the Sun. The newly found planet candidate is located in the outer regions of the system, about ten times further out [1].

The planet candidate around HD 100546 was detected as a faint blob located in the circumstellar disc revealed thanks to the NACO adaptive optics instrument on ESO's VLT, combined with pioneering data analysis techniques. The observations were made using a special coronagraph in NACO, which operates at near-infrared wavelengths and suppresses the brilliant light coming from the star at the location of the protoplanet candidate [2].

According to current theory, giant planets grow by capturing some of the gas and dust that remains after the formation of a star [3]. The astronomers have spotted several features in the new image of the disc around HD100546 that support this protoplanet hypothesis. Structures in the dusty circumstellar disc, which could be caused by interactions between the planet and the disc, were revealed close to the detected protoplanet. Also, there are indications that the surroundings of the protoplanet are potentially heated up by the formation process.

2 + 2 = 4

Brain-to-brain interface transmits information from one rat to another

Image
© Katie Zhuang/ Miguel Nicolelis/ Duke University
Electronically linked brains could facilitate rehabilitation and revolutionise computing

In Star Trek, the Borg is a menacing race of cybernetically-enhanced beings who conquer other races and assimilate them. They do not act as individuals, but rather as an interconnected group that makes decisions collectively. Assimilation involves integrating other life forms into the Collective, using brain implants that connect them to the "hive mind," such that their biology and technology can help the Borg to become the perfect race. This is a popular concept that can be found elsewhere in science fiction, but scientists have now moved a step closer to making it a reality.

Earlier this month, Miguel Nicolelis of Duke University Medical Center and his colleagues reported the development of a brain-machine interface that enables rats to detect infrared light via their sense of touch. Now, the same group of researchers has taken this technology in an entirely new direction - they have developed a brain-to-brain interface that can transmit information from one rat directly to another, enabling the animal on the receiving end to perform behavioural tasks without training.

In one experiment, Nicolelis and his colleagues placed rats into a box containing two levers, and trained the animals to press one of them whenever it lit up, or to poke their noses into one of two different-sized holes in order to get a drink. They then trained another group of rats to perform both tasks while their brains were stimulated with electrodes implanted into the motor cortex, which controls movement, or the somatosensory cortex, which processes touch information, mostly from the whiskers. In this way, the second group of animals learned the gist of both tasks and became accustomed to pressing one of the levers and poking their noses into one of the holes, depending on the frequency of the electrical stimulation.

Cell Phone

Research: Brain can't cope with making a left-hand turn and talking on hands-free cell phone

Image
© Unknown
Making a left-hand turn requires a huge amount of brain activation and involves far more areas of the brain than driving on a straight road or other maneuvers.

Most serious traffic accidents occur when drivers are making a left-hand turn at a busy intersection.

When those drivers are also talking on a hands-free cell phone, "that could be the most dangerous thing they ever do on the road," said Dr. Tom Schweizer, a researcher at St. Michael's Hospital.

Researchers led by Dr. Schweizer tested healthy young drivers operating a novel driving simulator equipped with a steering wheel, brake pedal and accelerator inside a high-powered functional MRI. All previous studies on distracted driving have used just a joy-stick or trackball or else patients passively watching scenarios on a screen.

Immersing a driving simulator with a fully functional steering wheel and pedals in an MRI at Sunnybrook Health Sciences Centre allowed researchers to map in real time which parts of the brain were activated or deactivated as the simulator took them through increasingly difficult driving maneuvers.

Question

Whoa! Scientists graft eye tissues onto tails of blind tadpoles which gives tadpoles sight

Image
© Douglas Blackiston Researchers grafted the tails of blind tadpoles of the African frog with eye tissue, which gave the tadpoles sight.
Eyes hooked up to the tail can help blinded tadpoles see, researchers say.

These findings could help guide therapies involving natural or artificial implants, scientists added.

A major roadblock when it comes to treating blindness and other sensory disorders is how much remains unknown about the nervous system and its ability to adapt to change. To learn more about the relationship between the body and the brain, researchers wanted to see how capable the brain was of interpreting sensory data from abnormal "ectopic" locations from which it normally does not receive signals.

Info

Blood's stretchy properties

Blood Plasma
© http://bit.ly/YECC6M | Public domain
Blood has long been the focus of research -- but it still offers some surprises. A new study reveals that plasma, the fluid in which blood cells travel, behaves a bit like a solid on small scales.

Blood is a suspension of cells inside a liquid. As it flows, it delivers vital oxygen and nutrients to all parts of the body. By better understanding blood plasma -- a solution mostly made up of water that transports red and white blood cells, platelets, salts, proteins, and fats -- researchers can more accurately model the motion of blood within the human body and use that information to help develop artificial substitutes.

On a small scale, whole blood, like ketchup, acts elastic. Consider that scourge of restaurant diners: ketchup in a glass bottle. You shake and shake the bottle, but like a solid mass, the stubborn substance refuses to budge. Finally, the ketchup goes into fluid mode all at once, flooding the plate in red.

Scientists previously attributed this behavior to the blood cells floating in the plasma, not to the plasma itself. And tests suggested that plasma was indeed a normal fluid, exhibiting no side-to-side elasticity.

However, not all scientists agreed with the assumption that plasma was normal. With the rise of affordable high-speed cameras, they could attempt new tests of plasma's elongational elasticity. And one such experiment, published in Physical Review Letters, has shown that plasma is not as simple as once believed.

Beaker

Marin environmentalist claims recreating extinct species is possible

Stewart Brand
© Larry Busacca/Getty ImagesStewart Brand poses for a portrait during the 2013 Sundance Film Festival.
Long Beach, San Francisco - Speaking from the prestigious TED Conference in Long Beach Wednesday, Sausalito activist Stewart Brand said scientists are developing the ability to reassemble an extinct animal's genome, and even recreate the animal itself.

Brand, who gained fame after he campaigned to have the original NASA space photos of earth published, and subsequently created the Whole Earth Catalog, said Wednesday that "de-extinction" could be used to help restore organisms and habitats damaged human activity, according to a report in the Marin Independent Journal.

A team of Harvard geneticists are currently working to bring back the passenger pigeon, which has been extinct since 1914, according to the TED website. The passenger pigeon is considered a keystone species because it aided the survival of the buffalo, according to TED. Researchers believe it may now be possible to alter the genetic makeup of a close relative, the band-tailed pigeon, to re-engineer the passenger pigeon.

Magnify

Virtopsy: A new alternative to traditional autopsy

Image
The body of a 50-year-old man run over by a train. Note the severed spine.
Scientific advances have led experts to pioneer the 'virtopsy', a non-invasive imaging process which can reveal details conventional methods would have missed

Anyone who has spent any time in a courtroom knows how easy it is for a skilled defence lawyer to plant doubt in the mind of a jury. Even in a relatively straightforward case, such as a hit and run, jurors are frequently presented with such a confusing array of photographic and forensic evidence that it is very difficult to know what has taken place and who may be at fault.

But what if there was a kind of technology that could reconstruct the crime scene in 3D and match it to other forensic imaging data? Furthermore, what if this technology could see through skin, bone and even soft tissue to detect bullet fragments overlooked by traditional pathologists equipped only with a scalpel and the human eye?

That is the promise of virtual autopsy - or "virtopsy" - a radical new approach to forensic imaging developed in Switzerland that is fast winning converts in Britain and elsewhere.

Just as forensic pathologists at the University of Leicester recently used computed tomography (CT) to identify the two fatal blows to the Plantagenet king Richard III, so a team of Zurich-based radiologists and pathologists is now using similar CT and magnetic resonance imaging (MRI) technology to help solve modern-day murders and crimes.

The difference is that the Swiss team, led by Professor Michael Thali of the Institute of Forensic Medicine in Zurich, has gone a stage further, not only using X-ray imaging to create scalpel-free 3D images of intact cadavers but also building a "Virtobot" capable of carrying out precise postmortem tissue sampling - and all without exposing pathologists to harmful radiation or bodily contaminants.

Galaxy

DNA 'ingredients' discovered in interstellar space; odds of discovering alien life increase

Milky Galaxy
© Wikimedia CommonsArtist's conception of the Milky Way galaxy.
It's a significant finding in the search for signs of extraterrestrial life.

According to astronomers using the National Science Foundation's Green Bank Telescope, evidence of prebiotic molecules have been discovered in interstellar space - the first such evidence unearthed. The finding, according to experts, could increase the odds of discovering life outside of our own solar system.

Among the prebiotic molecules discovered by a team of Virginia astronomy students includes a molecule called ethanamine, which is thought to produce adenine, one of the four nucleobases that form the rungs of DNA. Another newly-discovered molecule, called cyanomethanimine, is thought to have a role in the formation of the amino acid alanine - a key process in biology. Laboratories at the University of Virginia and the Harvard-Smithsonian Center for Astrophysics measured radio emission from cyanomethanimine and ethanamine, and the frequency patterns from those molecules then were matched to publicly-available data produced by a survey done with the GBT from 2008 to 2011, researcher said in a statement released to the press Thursday.

Question

NASA discovers new radiation belt around Earth

Radiation Belt_1
© NASA/Van Allen Probes/Goddard Space Flight CenterTwo giant swaths of radiation, known as the Van Allen Belts, surrounding Earth were discovered in 1958. In 2012, observations from the Van Allen Probes showed that a third belt can sometimes appear. The radiation is shown here in yellow, with green representing the spaces between the belts.
A ring of radiation previously unknown to science fleetingly surrounded Earth last year before being virtually annihilated by a powerful interplanetary shock wave, scientists say.

NASA's twin Van Allen space probes, which are studying the Earth's radiation belts, made the cosmic find. The surprising discovery - a new, albeit temporary, radiation belt around Earth - reveals how much remains unknown about outer space, even those regions closest to the planet, researchers added.

After humanity began exploring space, the first major find made there were the Van Allen radiation belts, zones of magnetically trapped, highly energetic charged particles first discovered in 1958.

"They were something we thought we mostly understood by now, the first discovery of the Space Age," said lead study author Daniel Baker, a space scientist at the University of Colorado.