Van Gogh Painting Uncovered By New Xray Machine

Rolling back the centuries: Dr Karen Rickers, above, fires the accelerator

From The Telegraph:

A new technique promises to reveal hundreds of masterpieces hidden beneath later works. Harry de Quetteville reports

It amounts to the biggest single art find: a host of unseen works by masters old and new, from Rembrandt to Van Gogh and Picasso. But these works can't be seen on the walls of any gallery or museum. And they are hidden not in a safe or bank vault, but on canvases which the artists themselves painted over.

Now, however, scientists are employing a revolutionary technique to reveal these spectacular images. Using circular particle accelerators, hundreds of metres across, they fire Xrays 10,000 times more powerful than any hospital scan at the priceless paintings.

It is not the first time that art historians have employed science to peer beyond the façade of masterworks. Leonardo, Brueghel and Courbet are some of the many artists whose canvases are emerging as ultra-valuable palimpsests, where the original image has been muffled by over-eager restoration or concealed by over-painting.

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New Life Found in Old Tombs

From Live Science:

Talk about secrets of the crypt: Two newly discovered species of bacteria have been found on the walls of ancient Roman tombs.

Bacteria often grow on the walls of underground tombs, causing decay and damaging these archaeological sites. Scientists in Italy found the two new microbes while studying decayed surfaces in the Catacombs of Saint Callistus in Rome.

The Catacombs of Saint Callistus are part of a massive underground graveyard that covers 37 acres. The tombs, named after Pope Saint Callistus I, were built at the end of the second century. More than 30 popes and martyrs are buried in the catacombs.

The new bacteria, part of the Kribbella genus first discovered in 1999, were isolated from whitish-gray patinas, or coatings, on surfaces in the catacombs. They have been named Kribbella catacumbae and Kribbella sancticallisti.

The discovery is detailed in the September issue of the International Journal of Systematic and Evolutionary Mircobiology.

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Why Earth's Magnetic Field Flip-Flops

Earth's magnetic field may actually be two fields from separate sources. Credit: Dreamstime

From Live Science:

Every so often, Earth's magnetic field flips on its head, turning the magnetic North Pole into the South Pole and vice versa.

It last happened 780,000 years ago, and is predicted to occur again in about 1,500 years ... maybe. The overall frequency is hard to predict — there was one period in Earth's history when the field didn't reverse for 30 million years.

Why these flip-flops happen at all is a great riddle, but a new hypothesis on the origins of the magnetic field could shed light on the reason.

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The Finest Science Images of 2008: Your Pick

From Wired Science:

The year's finest science images and visualizations have been announced -- and now it's your turn to pick a winner.

The entries come from the 2008 International Science and Engineering Visualization Challenge, sponsored by the National Science Foundation and the journal Science.

Below are not only the winners of the photography, illustration and visualization categories, but the runners-up. The images are so uniformly amazing that you might prefer one of the contenders.

One week from now, we'll close the voting and announce your category winners -- and, of course, the über-winner.

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Scientists Report Advance in Stem Cell Alternative

Human embryonic stem cell (gold) growing on a layer of supporting cells (fibroblasts).

From the Washington Post:

Scientists reported yesterday that they have overcome a major obstacle to using a promising alternative to embryonic stem cells, bolstering prospects for bypassing the political and ethical tempest that has embroiled hopes for a new generation of medical treatments.

The researchers said they found a safe way to coax adult cells to regress into an embryonic state, alleviating what had been the most worrisome uncertainty about developing the cells into potential cures.

"We have removed a major roadblock for translating this into a clinical setting," said Konrad Hochedlinger, a Harvard University stem cell researcher whose research was published online yesterday by the journal Science. "I think it's an important advance."

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Russia, Georgia and the Space Station

An Editorial From The New York Times:

Unless the Senate acts soon, the United States could lose its access to the International Space Station. The country is in a bind because NASA plans to retire the aging space shuttle fleet two years from now. Without a Congressional waiver, the agency will be barred from buying seats on Russia’s space vehicles.

Many members of Congress are understandably furious over Russia’s invasion of Georgia. Unless they approve a waiver, the United States will have to remove its crew from the space station in 2011 — leaving a very expensive investment essentially to the Russians.

The shuttles’ successor vehicle, the Orion, won’t be ready before 2015. That leaves a five-year gap where the only way to reach the station is via Russia’s Soyuz vehicles. The capsules carry Russian cosmonauts and ferried American astronauts after the Columbia accident.

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Space Exploration Key To Mankind's Survival: NASA Chief

NASA Administrator Michael Griffin

From Breitbart/AFP:

Mankind's very survival depends on the future exploration of space, said NASA chiMichael Griffin in an interview with AFP marking the 50th anniversary of the US space agency.

This journey, said the veteran physicist and aerospace engineer, is full of unknowns and has only just begun.

"Does the survival of human kind depend upon it? I think so," he said.

Griffin compared the first walk on the Moon with Christopher Columbus's first voyage to the Americas.

"He travelled for months and spent a few weeks in the Americas and returned home. He could hardly have said to have explored the New World.

"So we have just begun to touch other worlds," said Griffin.

"I think we must return to the Moon because it's the next step. It's a few days from home," he said, adding Mars was also "only a few months" from Earth.

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More News On China's Experimental Space Drive

Chinese Say They're Building 'Impossible' Space Drive
-- Wired Magazine

Chinese researchers claim they've confirmed the theory behind an "impossible" space drive, and are proceeding to build a demonstration version. If they're right, this might transform the economics of satellites, open up new possibilities for space exploration –- and give the Chinese a decisive military advantage in space.

To say that the "Emdrive" (short for "electromagnetic drive") concept is controversial would be an understatement. According to Roger Shawyer, the British scientist who developed the concept, the drive converts electrical energy into thrust via microwaves, without violating any laws of physics. Many researchers believe otherwise. An article about the Emdrive in New Scientist magazine drew a massive volley of criticism. Scientists not only argued that Shawyer's work was blatantly impossible, and that his reasoning was flawed. They also said the article should never have been published.

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Ageing Mars Rover To Embark On Epic Two-Year Journey To Giant Crater... Despite Wobbly Wheel

Great Endeavour: An artist's impression of the Mars rover Opportunity, which will make a seven-mile journey from one crater to another over the next two years

From The Daily Mail:

The ageing but intrepid Mars rover Opportunity is set to embark on a two-year mission it may never complete - a seven-mile journey to a crater far bigger than one it has called home for two years, NASA have revealed.

The golf-cart-sized robot with a wobbly front wheel climbed out of Victoria crater earlier this month and scientists at NASA's Jet Propulsion Laboratory in California are steering the probe toward a crater more than 20 times larger, dubbed Endeavor.

But with the rover able to travel only 110 yards per day, the mission control team at JPL said it could take two years for Opportunity to reach its destination. There is no guarantee the vehicle will survive the trip.

Opportunity, like its twin rover Spirit, semi-idle for the moment on the opposite side of Mars, is well past its original three-month life expectancy.

The seven-mile stretch between Victoria and Endeavor craters matches the total distance the rover already has covered in the four-and-a-half years since landing on the planet.

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Simple Device Which Uses Electrical Field Could Boost Gas Efficiency

From E!Science News:

With the high cost of gasoline and diesel fuel impacting costs for automobiles, trucks, buses and the overall economy, a Temple University physics professor has developed a simple device which could dramatically improve fuel efficiency as much as 20 percent. According to Rongjia Tao, Chair of Temple's Physics Department, the small device consists of an electrically charged tube that can be attached to the fuel line of a car's engine near the fuel injector. With the use of a power supply from the vehicle's battery, the device creates an electric field that thins fuel, or reduces its viscosity, so that smaller droplets are injected into the engine. That leads to more efficient and cleaner combustion than a standard fuel injector, he says.

Six months of road testing in a diesel-powered Mercedes-Benz automobile showed that the device increased highway fuel from 32 miles per gallon to 38 mpg, a 20 percent boost, and a 12-15 percent gain in city driving.

The results of the laboratory and road tests verifying that this simple device can boost gas mileage was published in Energy & Fuels, a bi-monthly journal published by the American Chemical Society.

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Rocks May Be Oldest on Earth, Scientists Say

Researchers report that this rock is 4.28 billion years old and
formed when the Earth was less than 300 million years old.

From The New York Times:

A swath of bedrock in northern Quebec may be the oldest known piece of the Earth’s crust.

In an article appearing in Friday’s issue of the journal Science, scientists report that portions of that bedrock are 4.28 billion years old, formed when the Earth was less than 300 million years old.

“These rocks paint this picture of an early Earth that looked pretty much like the modern Earth,” said Richard Carlson of the Carnegie Institution of Washington and one of the authors of the paper.

Other scientists are intrigued, but not yet entirely convinced that the rocks are quite that old.

“There is a certain amount of healthy skepticism that needs to play a role here,” said Stephen J. Mojzsis, a professor of geological sciences at the University of Colorado. Dr. Mojzsis said the new research was well done, but that he thought these were younger sedimentary rocks, pressed together out of the remnants of earlier rocks that were indeed 4.28 billion years old.

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A New Era For Wave Energy

From CNN:

LONDON, England (CNN) -- The renewable energy sector has received a boost with the inauguration of the world's first commercial wave power project off the Portuguese coast.

Developed by a Scottish engineering company, Pelamis Wave Power Limited, the Pelamis Wave Energy Converters (PWEC) have been towed into position three miles off the coast of Agucadoura in north Portugal.

The first phase of the project is using three PWEC to generate 2.25 megawatts of power at a cost of nine million euros.

If successful, a second phase will see energy generation rise to 21 megawatts from a further 25 machines providing electricity for 15,000 Portuguese homes.

The project is a joint venture between Pelamis Wave Power Limited, Babcock and Brown Ltd -- a global specialist asset manager, Energias de Portugal (EDP) and Portuguese energy group EFACEC.

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Colorful Study Probes Climate Change, Fall Foliage

From ABC News:

Where tourists swarm to see fall colors, study examines climate change's effects

Could climate change dull the blazing palette of New England's fall foliage? The answer could have serious implications for one of the region's signature attractions, which draws thousands of "leaf peepers" every autumn.

Biologists at the University of Vermont's Proctor Maple Research Center will do some leaf peeping of their own to find out — studying how temperature affects the development of autumn colors and whether the warming climate could mute them, prolong the foliage viewing season or delay it.

Using a three-year, $45,000 U.S. Department of Agriculture grant, they're planning to measure the color pigments in leaves exposed to varying temperatures in hopes of finding a pattern. The study starts next month, although some experiments are already under way.

"It is getting warmer, and people want to know how that's going to affect this big process that's so important to us," said research associate Abby van den Berg.

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NAS Reports: 50 Million Year Cooling Trend

Graph above added by Anthony - not part of original article

From Watts Up With That?:

With all the focus on human-triggered global warming, it may be hard to imagine that the world is riding a 50-million-year-long cooling trend.

But it is, and blame the trend on a continental-scale collision, say geophysicists Dennis Kent of Rutgers University and Giovanni Muttoni of the University of Milan in Italy.

Researchers say there is strong evidence that increases in atmospheric CO2 contributed to a warm spell 50 million years ago dubbed the Early Eocene climate optimum - the warmest period in 65 million years. But over the following 15 million years, deep sea temperatures fell by about 10.8 degrees F., reflecting a significant cooling at the surface. This cooling ultimately allowed the cycle of ice ages to emerge.

Drs. Kent and Muttoni have mined paleomagnetic and other data and suggest that atmospheric CO2 dropped because India collided with Eurasia, shutting down a productive, natural CO2 factory.

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China launches riskiest space mission yet

From Space Daily:

China on Thursday launched its riskiest space flight yet, sending three men into orbit on a mission that will include the nation's first ever space walk, state media said.

The Shenzhou VII spacecraft lifted off from Jiuquan Satellite Launch Centre in northwest China at 9:10 pm (1310 GMT) in the presence of President Hu Jintao and other senior leaders, state television reported live.

"The successful launch marked the first victory of the Shenzhou VII mission," a triumphant Hu said.

As the spacecraft entered its pre-set orbit, the three astronauts kept in contact with ground control, occasionally waving to a camera as notebooks floated around in the weightlessness of their shuttle cabin.

Hu earlier saw off the three, led by 41-year-old Zhai Zhigang, as they prepared for their 68-hour journey to space and back.

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Formula Discovered For Longer Plant Life

From Science Daily:

ScienceDaily (Sep. 24, 2008) — Molecular biologists from Tuebingen, Germany, have discovered how the growth of leaves and the aging process of plants are coordinated.

Plants that grow more slowly stay fresh longer. Scientists at the Max Planck Institute for Developmental Biology in Tuebingen, Germany, have shown that certain small sections of genes, so-called microRNAs, coordinate growth and aging processes in plants.

These microRNAs inhibit certain regulators, known as TCP transcription factors. These transcription factors in turn influence the production of jasmonic acid, a plant hormone. The higher the number of microRNAs present, the lower the number of transcription factors that are active, and the smaller the amount of jasmonic acid, which is produced by the plant.

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World’s Largest Tsunami Debris Discovered

Tongatapu boulder. (Credit: Courtesy of M. Hornbach)

From Science Daily:

ScienceDaily (Sep. 25, 2008) — A line of massive boulders on the western shore of Tonga may be evidence of the most powerful volcano-triggered tsunami found to date. Up to 9 meters (30 feet) high and weighing up to 1.6 million kilograms (3.5 million pounds), the seven coral boulders are located 100 to 400 meters (300 to 1,300 feet) from the coast.

The house-sized boulders were likely flung ashore by a wave rivaling the 1883 Krakatau tsunami, which is estimated to have towered 35 meters (115 feet) high.

“These could be the largest boulders displaced by a tsunami, worldwide,” says Matthew Hornbach of the University of Texas Institute for Geophysics. “Krakatau’s tsunami was probably not a one-off event.” Hornbach and his colleagues will discuss these findings at the Joint Annual Meeting of the Geological Society of America (GSA), Soil Science Society of America (SSSA), American Society of Agronomy (ASA), Crop Science Society of America (CSSA), and the Gulf Coast Association of Geological Societies (GCAGS), in Houston, Texas, USA.*

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China Near's Completion Of Its Own Emdrive

Wired reports that China will build the Controversial Emdrive.

This site has covered the Emdrive several times before, including the controversy, and the upside. A successful superconducting system would be most efficient at nulling out gravity (3 tons of lift per kilowatt).

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Father Of The Internet: 'Web Is Running Out Of Addresses'

From Times Online:

The world is about to run out of the internet addresses that allow computers to identify each other and communicate, the man who invented the system has told The Times.

Vint Cerf, the “father of the internet” and one of the world’s leading computer scientists, said that businesses and consumers needed to act now to switch to the next generation of net addresses. Unless preparations were made now, he said, some computers might not be able to go online and the connectivity of the internet might be damaged.

Mr Cerf said that internet service providers in particular needed to prepare and that time was running out for a smooth transition.

Every computer and online device is assigned a unique IP address, but the pool of unallocated numbers is about to dry up.

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Melamine 'Widespread' In China's Food Chain

From New Scientist:

Melamine, the chemical that has tainted milk formula in China and made thousands of children ill, may have been part of the food chain in China for a long time, say food experts. But the health effects of long-term exposure in adults are unclear.

So far, 53,000 infants have fallen ill after drinking formula milk deliberately adulterated with melamine. Four babies have died, 13,000 have been hospitalised and 104 are in a critical condition with kidney stones caused by the adulterant. A girl in Hong Kong has become the first case of poisoning outside China.

The makers of baby formula require their milk to have a high protein content, which they determine by measuring its nitrogen content. But farmers who produce milk that doesn't meet this standard can beat the test by mixing it with melamine powder.

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