Friday, November 6, 2009

Out Of The Blue: Islands Seen From Space


From Wired Science:

Islands are some of the most beautiful, peaceful, violent, desolate and unique places on Earth. While experiencing a tropical island from its sandy beaches, or a volcanic island from its towering peaks is wonderful, experiencing them from above can be inspiring as well.

We’ve collected images taken by astronauts and satellites from space of some of the most interesting islands on the planet.

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Methane Maps Step One for Energy Prospectors


From Popular Mechanics:

A team of geologists recently found hundreds of plumes of methane gas—a potent greenhouse gas and potential energy source—in the Arctic Ocean, indicating there may be more methane being released from deep in the ocean than expected. Here is a look at the recent findings and the known sources of methane out today.

An international team of scientists has found hundreds of methane gas plumes in the depths of the Arctic Ocean. German and English researchers used sonar to detect 250 columns of bubbles pushing out of the seabed of West Spitsbergen and then sampled the water in those areas, finding that the gas was predominantly methane. The discovery indicates there may be more of the gas being released and from deeper areas of the Arctic seabed than expected.

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PICTURES: "Extraordinary" Ancient Skeletons Found

Photograph courtesy Saxony-Anhalt State Office for Heritage Management and Archaeology

From National Geographic:

This "extraordinary" skeleton of a woman buried in a seated position was discovered during an archaeological survey before the planned construction of a high-speed train track in central Germany, scientists said in a statement.

The woman, who lived in the early Bronze Age (roughly 2200 to 1600 B.C.), was found near the town of Bad Lauchstadt and is one of several burials found so far during the dig, which runs from September 2008 to June 2010.

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Large Hadron Collider Stalled Again... Thanks To Chunk Of Baguette

A spokesman for CERN told The Times: 'Nobody knows how it got there. The best guess is that it was dropped by a bird, either that or it was thrown out of a passing aeroplane'

From Times Online:

The rehabilitation of the beleaguered Large Hadron Collider was on hold tonight after the failure of one of its powerful cooling units caused by an errant chunk of baguette.

The £4 billion particle-collider faced more than a year of delays after a helium leak stymied the project in its first few days of operation. It is gradually being switched back on over the coming months but suffered a new setback on Tuesday morning.

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Dead Star Encased in Diamond Shroud

An unusual neutron star appears to be covered in a thin atmosphere of carbon. Cassiopeia A appears in this photo, with the neutron star at its center highlighted in the right-hand corner. Chandra image: NASA/CXC/Southampton/W.Ho; Illustration: NASA/CXC/M.Weiss

From Discovery News:

Astronomers have just solved a decade-old mystery that explains the unusual behavior of a neutron star -- the dense, hot corpse left behind after a massive stellar explosion -- at the center of the Cassiopeia A supernova remnant.

It wasn't the X-rays streaming from the center of the supernova remnant that astronomers found puzzling. It's why the beams weren't pulsating as expected. Now the scientists know why: The neutron star is covered with a thin atmosphere of carbon, which acts like a giant bulb to smooth light in all directions.

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Vast Stars Fed Biggest Black Holes

Supermassive black holes are found at the centre of galaxies. Credit: NASA/JPL-Caltech

From Cosmos:

SYDNEY: Stars more than one million times as massive as the Sun may be more stable than astronomers thought, and have created seeds that grew into the largest supermassive black holes.

Supermassive black holes are found at the centre of most galaxies, including our own Milky Way. Theories about their formation range from collapsing clouds of gas to collisions between smaller black holes.

Astrophysicists have also suggested that supermassive black holes could have formed from the catastrophic collapse of incredibly large stars that were one million to one billion times the mass of the Sun.

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Thursday, November 5, 2009

Spinal Cord Regeneration Enabled By Stabilizing, Improving Delivery Of Scar-degrading Enzyme

Image showing the extent of new nerves (green) that regenerated after treatment with the enzyme. (Credit: Image courtesy of Ravi Bellamkonda)

From Science Daily:

Science Daily (Nov. 5, 2009) — Researchers have developed an improved version of an enzyme that degrades the dense scar tissue that forms when the central nervous system is damaged. By digesting the tissue that blocks re-growth of damaged nerves, the improved enzyme -- and new system for delivering it -- could facilitate recovery from serious central nervous system injuries.

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The Many Mysteries of Neanderthals

Comparison between Neanderthal and modern human skeletons. Photo: K. Mowbray, Reconstruction: G. Sawyer and B. Maley, Copyright: Ian Tattersall

From Live Science:

We are currently the only human species alive, but as recently as maybe 24,000 years ago another one walked the earth — the Neanderthals.

These extinct humans were the closest relatives we had, and tantalizing new hints from researchers suggest that we might have been intimately close indeed. The mystery of whether Neanderthals and us had sex might possibly get solved if the entire Neanderthal genome is reported soon as expected. The matter of why they died and we succeeded, however, remains an open question.

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How The Elephant Got Its Trunk (And Other Wonders Of Nature)

'No one has ever really known how the elephant got its trunk, or how the leopard got its spots. This project will lay the foundation for work that will answer those questions and many others,' says Dr David Haussler

From The Independent:

Nobel laureate to reveal secrets of evolution via massive gene-mapping project.

An ambitious plan to map the genomes of 10,000 species of vertebrates – animals with backbones – has been announced by scientists.

Unravelling the DNA sequences of the many species of vertebrates will help science to explain how the leopard got its spots, how the elephant came by its trunk and how the bat learned to fly, the researchers said.

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Spraying On Skin Cells To Heal Burns

Photo: Spray-on skin: In a unique treatment for second-degree burns, surgeons harvest a small number of skin cells through a skin biopsy, suspend them in solution, and then spray the resulting mixture onto a burn wound. Once in place, skin stem cells, called basal cells, proliferate to create a new layer of skin. Credit: ReCell

From Technology Review:

A new technique in burn treatment provides an alternative to skin grafts in the operating room.

Traditionally, treatment for severe second-degree burns consists of adding insult to injury: cutting a swath of skin from another site on the same patient in order to graft it over the burn. The process works, but causes more pain for the burn victim and doubles the area in need of healing. Now a relatively new technology has the potential to heal burns in a way that's much less invasive than skin grafts. With just a small skin biopsy and a ready-made kit, surgeons can create a suspension of the skin's basal cells--the stem cells of the epidermis--and spray the solution directly onto the burn with results comparable to those from skin grafts.

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I Can Has Swine Flu? A Cat Comes Down with H1N1

Photo: Michael Waine / Corbis

From Time Magazine:

For all the attention that has whirled around H1N1 in recent months, it seems that one vulnerable, and furry, population may have been overlooked: the family pet.

On Wednesday, the Iowa Department of Public Health reported the first confirmed case of H1N1 in a house pet, a 13-year-old domestic shorthaired cat. The animal likely contracted the virus from its owners, veterinarians say, since two of the three family members living in the cat's household had recently suffered from influenza-like illness. Late last week, when the cat came down with flu-like symptoms — malaise, loss of appetite — its owners brought it to Iowa State University College of Veterinary Medicine for treatment. The family mentioned to the vet that they had also recently battled illness, which led to testing the pet for H1N1.

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Policy Decisions Slow H1N1 Vaccine Production


From Future Pundit:

Why is H1N1 influenza vaccine coming out so slowly in the United States? Dr. Scott Gottlieb, a former FDA deputy commissioner, says a few policy decisions slow the production of vaccine.

Why do adjuvants matter? An adjuvanted H1N1 vaccine being used in Europe contains 3.75 micrograms of vaccine stock. The same vaccine in the U.S., without the adjuvant, requires 15 micrograms of vaccine for equal potency. If we used adjuvants, we could have had four times the number of shots with the same raw material.

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A Language of Smiles


From The New York Times:

Say “eeee.” Say it again. Go on: “eeee.”

Maybe I’m easy to please, but doing this a few times makes me giggle. “Eeee.”

Actually, I suspect it’s not just me. Saying “eeee” pulls up the corners of the mouth and makes you start to smile. That’s why we say “cheese” to the camera, not “choose” or “chose.” And, I think, it’s why I don’t get the giggles from “aaaa” or “oooo.”

The mere act of smiling is often enough to lift your mood; conversely, the act of frowning can lower it; scowling can make you feel fed up. In other words, the gestures you make with your face can — at least to some extent — influence your emotional state.

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In the Mediterranean, Killer Tsunamis From an Ancient Eruption


From The New York Times:

The massive eruption of the Thera volcano in the Aegean Sea more than 3,000 years ago produced killer waves that raced across hundreds of miles of the Eastern Mediterranean to inundate the area that is now Israel and probably other coastal sites, a team of scientists has found.

The team, writing in the October issue of Geology, said the new evidence suggested that giant tsunamis from the catastrophic eruption hit “coastal sites across the Eastern Mediterranean littoral.” Tsunamis are giant waves that can crash into shore, rearrange the seabed, inundate vast areas of land and carry terrestrial material out to sea.

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The New Science of Temptation

Lev Dolgatshjov

From Scientific American:

What happens when Harvard scientists use a brain scanner to look for the devil inside?

The power to resist temptation has been extolled by philosophers, psychologists, teachers, coaches, and mothers. Anyone with advice on how you should live your life has surely spoken to you of its benefits. It is the path to the good life, professional and personal satisfaction, social adjustment and success, performance under pressure, and the best way for any child to avoid a penetrating stare and a cold dinner. Of course, this assumes that our natural urges are a thing to be resisted – that there is a devil inside, luring you to cheat, offend, err, and annoy. New research has begun to question this assumption.

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The World’s 18 Strangest Bridges: Gallery



From Popular Mechanics:


Some bridges are engineered with nothing but utility in mind—for these, aesthetic design is secondary to safety and longevity. And given that San Francisco's Bay Bridge was just closed for six days, this makes sense. But advances in design software and construction materials have given bridge architects opportunities to focus on original, striking and sometimes whimsical designs that impress, while keeping function in mind. Here are some of our favorite unusual bridges'and why they're architecturally striking.

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Object-Detection Software To Enable Search Within Videos

People Detector Where's Elvis? Tony Han/MU

From Popular Science:

Detection algorithms help computers find humans, or anything else, in YouTube videos or surveillance footage.

Imagine running a Google search for basketball videos, and having your computer sift through actual footage of online videos rather than just the text of the descriptions. A new type of software could enable computers to run searches inside videos, and pick out humans and objects alike.

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80 Min Exercise Per Week Prevents Visceral Weight Gain


From Future Pundit:

Fat around your internal organs is thought to be a much bigger risk factor for heart disease than fat near the surface of the skin. Well, if you go on a diet, exercise, get your weight down, and then eventually go off the diet continued exercise will prevent the resulting weight gain from happening where the risk factor is greatest.

BIRMINGHAM, Ala. - A study conducted by exercise physiologists in the University of Alabama at Birmingham (UAB) Department of Human Studies finds that as little as 80 minutes a week of aerobic or resistance training helps not only to prevent weight gain, but also to inhibit a regain of harmful visceral fat one year after weight loss.

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Speed Limit To The Pace Of Evolution, Biologists Say

E. coli growing in a petri dish. (Credit: iStockphoto/Linde Stewart)

From Science Daily:

Science Daily (Nov. 3, 2009) — Researchers at the University of Pennsylvania have developed a theoretical model that informs the understanding of evolution and determines how quickly an organism will evolve using a catalogue of "evolutionary speed limits." The model provides quantitative predictions for the speed of evolution on various "fitness landscapes," the dynamic and varied conditions under which bacteria, viruses and even humans adapt.

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Recent Midwest Quakes Called Aftershocks From 1800s

Each cross marks an earthquake recorded in the New Madrid seismic zone since 1974

From Live Science:

The small earthquakes that sporadically rattle the central United States may actually be aftershocks from a few extremely large quakes that occurred in the region almost 200 years ago, according to a new study

The New Madrid Earthquakes, which struck between December 1811 and February 1812, are some of the strongest seismic events ever to occur in the contiguous United States in recorded history. The largest quake is estimated to have been 8.0 in magnitude and was powerful enough to temporarily make the Mississippi River flow backwards. The heart of the seismic activity was near the town of New Madrid, Missouri, close to the Kentucky and Tennessee borders.

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