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Thursday, June 23, 2011

NASA’s Cassini–Huygens spacecraft has discovered evidence for a large-scale saltwater reservoir beneath the icy crust of Saturn’s moon Enceladus. The data came from the spacecraft’s direct analysis of salt-rich ice grains close to the jets ejected from the moon. The study has been published in this week’s edition of the journal Nature.

Data from Cassini’s cosmic dust analyzer show the grains expelled from fissures, known as tiger stripes, are relatively small and usually low in salt far away from the moon. Closer to the moon’s surface, Cassini found that relatively large grains rich with sodium and potassium dominate the plumes. The salt-rich particles have an “ocean-like” composition and indicate that most, if not all, of the expelled ice and water vapor comes from the evaporation of liquid salt-water. When water freezes, the salt is squeezed out, leaving pure water ice behind.

Cassini’s ultraviolet imaging spectrograph also recently obtained complementary results that support the presence of a subsurface ocean. A team of Cassini researchers led by Candice Hansen of the Planetary Science Institute in Tucson, Arizona, measured gas shooting out of distinct jets originating in the moon’s south polar region at five to eight times the speed of sound, several times faster than previously measured. These observations of distinct jets, from a 2010 flyby, are consistent with results showing a difference in composition of ice grains close to the moon’s surface and those that made it out to the E ring, the outermost ring that gets its material primarily from Enceladean jets. If the plumes emanated from ice, they should have very little salt in them.

“There currently is no plausible way to produce a steady outflow of salt-rich grains from solid ice across all the tiger stripes other than salt water under Enceladus’s icy surface,” said Frank Postberg, a Cassini team scientist at the University of Heidelberg in Germany.

The data suggests a layer of water between the moon’s rocky core and its icy mantle, possibly as deep as about 50 miles (80 kilometers) beneath the surface. As this water washes against the rocks, it dissolves salt compounds and rises through fractures in the overlying ice to form reserves nearer the surface. If the outermost layer cracks open, the decrease in pressure from these reserves to space causes a plume to shoot out. Roughly 400 pounds (200 kilograms) of water vapor is lost every second in the plumes, with smaller amounts being lost as ice grains. The team calculates the water reserves must have large evaporating surfaces, or they would freeze easily and stop the plumes.

“We imagine that between the ice and the ice core there is an ocean of depth and this is somehow connected to the surface reservoir,” added Postberg.

The Cassini mission discovered Enceladus’ water-vapor and ice jets in 2005. In 2009, scientists working with the cosmic dust analyzer examined some sodium salts found in ice grains of Saturn’s E ring but the link to subsurface salt water was not definitive. The new paper analyzes three Enceladus flybys in 2008 and 2009 with the same instrument, focusing on the composition of freshly ejected plume grains. In 2008, Cassini discovered a high “density of volatile gases, water vapor, carbon dioxide and carbon monoxide, as well as organic materials, some 20 times denser than expected” in geysers erupting from the moon. The icy particles hit the detector target at speeds between 15,000 and 39,000 MPH (23,000 and 63,000 KPH), vaporizing instantly. Electrical fields inside the cosmic dust analyzer separated the various constituents of the impact cloud.

“Enceladus has got warmth, water and organic chemicals, some of the essential building blocks needed for life,” said Dennis Matson in 2008, Cassini project scientist at NASA’s Jet Propulsion Laboratory in Pasadena, California.

“This finding is a crucial new piece of evidence showing that environmental conditions favorable to the emergence of life can be sustained on icy bodies orbiting gas giant planets,” said Nicolas Altobelli, the European Space Agency’s project scientist for Cassini.

“If there is water in such an unexpected place, it leaves possibility for the rest of the universe,” said Postberg.

A compilation of brief news reports for Monday, January 23, 2012.

If you believe any of these stories deserves more in-depth coverage, feel free to write a full article on the issues raised.

A compilation of brief news reports for Thursday, December 4, 2008.

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On December 2, the Toronto city council voted in favor of banning the sales and distribution of bottled water on city property. The council also agreed to provide public drinking fountains on their properties, as well as on a measure that would make shoppers pay at least five Canadian cents for plastic grocery bags and force business owners to offer reusable bags and carry-out containers.

“Toronto’s decision to ban the bottle and turn on the tap sends a clear message that bottled water’s 15 minutes are up,” said Polaris Institute’s campaign coordinator, Joe Cressy.

All of the city’s facilities should be following the water ban by 2011, while businesses will have to implement their bag fees by 2010. Toronto has become the largest city in the world to ban bottled water on government property.

Related news

• “Calls for bottled water bans grow in Canada” — Wikinews, August 23, 2008

Sources

• “Toronto Bans Bottled Water” — CNW Group, December 3, 2008
• “Toronto council approves plastic bag charge, bottle ban” — CBC News, December 3, 2008

On Tuesday, American actor, Patrick Swayze, who suffers from pancreatic cancer, denied reports that he was near death. American tabloid National Inquirer reported on November 28 that Swayze’s cancer had spread to his liver and that he was preparing for his death.

“The only thorn in my side being that many tabloids have been consistently reporting lies and false information about me and those close to me,” said Swayze in a statement to the press who also added that he knows he is in “the fight for his life,” but that it is a fight that he “is winning.”

“I’m one of the lucky few that responds well to treatment,” added Swayze.

Swayze has starred in over a dozen films, including the 1987 hit film Dirty Dancing.

Related news

• “Wikinews Shorts: November 28, 2008” — Wikinews, November 28, 2008

Sources

• “Swayze denies ‘deathbed’ rumours” — BBC News Online, December 3, 2008
• “Patrick Swayze denies reports he is near death” — Reuters, December 2, 2008

Friday, October 10, 2008

Stock markets across the world have fallen sharply with several seeing the biggest drop in their history.

Asian markets saw the biggest sell-off. The Nikkei dropped 9.62% to reach a 20 year low. Japan also saw a collapse of a mid-size insurance company, Yamato Life Insurance Company, which declared bankruptcy. The Hang Seng, which was one of the few markets that was positive yesterday, fell 7.19%. Australia dropped by 8.4% and South Korea saw a 9% fall.

In Europe, markets dropped at the open with the FTSE losing 11%. They have recovered only sightly with all European markets losing more than 5%. The European sell off was more about the Asian lows then any specific news. European banks and financial institutes saw the most selling. Also, oil related companies saw large drops as an result of an expected decrease in oil consumption.

The U.S. markets opened lower with the Dow Jones Industrial Average falling below 8,000, before recovering slightly. President George W. Bush made an address on the economy and said markets were being “driven by uncertainty and fear.”

Oil has seen losses of more than US$6 in trading with the current price of a barrel of oil less than $80. This is a year low for oil. News also came out that OPEC will hold an emergency meeting on November 18 to discuss the falling price of oil.

Charities, such as Cats Protection, today said that they have lost much of their funds in collapsing banks. Cats Protection had a total of £11.2 million saved in the now-collapsed Kaupthing bank.

The British National Council for Voluntary Organisations said that 60 of its 6,500 have lost money due to the collapse of banks.

The Dow Jones Industrial Average fell to its lowest level in five years at 8,579.19, falling 679 points in one day. This, at 7.3%, is the eleventh largest percentage fall in the history of the index. The growth then continued, with the index being up over 150 points on the start of the day at one point.

The index, did however, recover, and as of 19:30 UTC was up 17.68 points, or 0.21%, pushing the index up to almost 8600.

Peter Cardillo, chief market economist at Avalon Partners, commented on these massive falls. “What we’ve seen here was one big margin call that just kept feeding on itself, so the opposite could happen. But you need a catalyst,” he said. “I’m more convinced now than ever that this market has made a bottom. The capitulation came when we breached 8,000,” he continued. “It doesn’t mean we can’t go back and revisit that level.”

The UK’s FTSE 100 index fell dramatically to close below 4000, in the index’s worst week in history. This is despite the fact that just a few days ago the index was above 5000, and the index peaked above 5500 in September.The FTSE 100 index has fallen by 41% this year.

Barclays Wealth analyst Henk Potts commented on this massive fall. “We are drowning in a sea of red numbers,” he claimed. “Investors are concerned about the exacerbation of the credit crunch and the gloomy forecasts for economic growth. The reality is that most investors have been spooked by the sheer pressure that the credit crunch is putting on the global economy.”

The Japanese Nikkei 225 has recorded it’s third biggest drop in history with a massive sell-off in the exchange that has resulted in USD 250 billion being knocked of the index’s value.

Toyota, which is the second largest carmaker in the world, fell by the largest amount in 21 years, while Elpida Memory, the world’s largest manufacturer of computer memory, dropped in value to a record low.

Masafumi Oshiden, a fund manager in Toyota commented on the drop.”It’s capitulation,” he said. “There are lots of forced sellers. If you’re a fund that’s going bust you need to close out all your positions.”

George W. Bush commented on the financial situation earlier today. “Over the past few days, we have witnessed a startling drop in the stock market — much of it driven by uncertainty and fear,” he said. “This has been a deeply unsettling period for the American people. Many of our citizens have serious concerns about their retirement accounts, their investments, and their economic well-being.”

Bush then continued by promoting the government’s plan’s to get through the crises. “Here’s what the American people need to know: that the United States government is acting; we will continue to act to resolve this crisis and restore stability to our markets. We are a prosperous nation with immense resources and a wide range of tools at our disposal. We’re using these tools aggressively.”

Gordon Brown, the UK Prime Minister, also spoke on the economy. “I think we quickly realised that we cannot solve the problems we have got as a result of the sub-prime market collapse simply by improving liquidity,” he said speaking in Birmingham to business leaders earlier today. “That would simply not be enough to deal with the bigger problem of rebuilding the banking system for the future and restoring trust is a fundamental element of that.”

Jim Flaherty, the Canadian minister for finance, also commented today on the recent incidents in the economy. “It is important to underline that Canada’s banks and other financial institutions are sound, well capitalized and less leveraged than their international peers,” he claimed. “Our mortgage system is sound. Canadian households have smaller mortgages relative both to the value of their homes and to their disposable incomes than in the U.S.”

“”However, it is becoming increasingly clear that the continuing disruption of global credit markets, which has been severe and protracted, is making it difficult for our financial institutions to raise long-term funding. This is beginning to affect the availability of mortgage loans and other types of credit in Canada,” he continued. “The Government has therefore decided to act to address the current scarcity of private sector lending to Canadian mortgage markets and lending markets overall. This is going to make loans and mortgages more available and more affordable for ordinary Canadians and businesses.”

Saturday, April 21, 2007

The contaminated pet food that was recalled after it was found to contain a harmful industrial chemical called melamine, has been used as pig feed at a hog farm in Ceres, California, located in the United States.

At least seven urine samples taken from pigs at the American Hog Farm, were tested and the results came back positive for the chemical melamine. At least three samples from the feed used to feed the pigs were tested and those results also came back positive for melamine.

Reports say that at least 100 pigs from the farm were slaughtered and sold from the “custom slaughterhouse” that is operated on the farms site. The meat is then sold to different places as “individual orders” and is not sold commercially for supermarkets. The affected meat goes as far back as April 3 and the company is asking anyone who bought it to return the product or throw it out.

Despite the sale, California State Veterinarian Dr. Richard Breitmeyer says that no evidence has turned up to suggest that the meat that was sold entered the human consumption chain.

“There is no evidence that any products from this farm have entered the food supply. The risk to people right now is minimal,” said Breitmeyer who also said that pet food from bags or boxes that have been torn or ripped, is sometimes reused as feed for small farms.

California’s Department of Food and Agriculture investigated the company and found that it had received the contaminated pet food from Diamond Pet Foods, which supplies retailers with the pet food Natural Balance, one of the over 100 recalled brands of pet food. Authorities then quarantined the farm to further investigate the situation.

At least 1,500 pigs are on the farm.

As of the moment, no other farms are being investigated, but officials say that other farms may also be affected.

“In the course of our investigation, we may find similar situations in other parts of the country,” said head of the Center for Veterinary Medicine at the U.S. Food and Drug Administration, Stephen Sundlof.

The FDA is continuing to investigate and Sundlof says that there is a possibility that the contamination of the pet food may be intentional.

“It would certainly lend credibility to the theory that it may be intentional. That will be one of the theories we will pursue when we get into the plants in China,” said Sundlof.

Last month, Menu Foods was the first to recall all of its 60 million products of dry and wet dog and cat food after pets began to fall ill and in some cases died of kidney failure. The FDA found melamine in samples of Menu Foods pet food and in samples of wheat gluten, imported from China, which was used as an ingredient.

Friday, March 9, 2007

Imagine coming back from a camping trip in the desert. Then a few months later you notice in your photos from the trip that you camped inside a giant impact crater so big that no one documented it before. Could it happen?

During several trips to the Black Rock Desert, mostly while supporting the Stratofox Aerospace Tracking Team for suborbital space rocket launch efforts, Ian Kluft KO6YQ noticed some oddities in rock formations. He had a little experience with volcanoes, and some rocks in the area looked unusual. There seemed to be some lava here and there – but where was the volcano? He observed that even a large caldera should have mostly volcanic rocks. He then noticed some curved geographic structures in satellite imagery which made him curious if it might be an impact crater.

A TV documentary about meteor impacts mentioned some characteristics of impact craters. He went to the Internet to learn more. He noticed some of his own pictures of the area had cone shaped structures which might be “shatter cones” due to an impact shock wave that passed through the rocks. Discussion with others produced suggestions and volunteers who joined the effort. More circular features in satellite photographs were found. Igneous dikes through white layers of rock had been described and were visible in many photos.

The possible impact crater is 30 miles (48 km) wide east-to-west and 40 miles (64 km) north-to-south centered around 40.984045 N, 118.916016 W. That is in northwestern Nevada halfway between Reno and the Oregon border. The apparent ancient geological structure is so old that much of it is eroded away. The forces that eroded the Black Rock Desert itself, whether glacier or stream, have apparently cut through the crater rims and floor to do it.

Following an expedition to the area in late January, more possible shatter cones were observed in one of the rock samples collected. These are only formed by the shock wave of an impact event or nuclear explosion. The nearest nuclear test was underground at Sand Springs Range in central Nevada. Atmospheric tests at the Nevada Test Site were at the southern, and opposite, end of the state. So that points toward an impact if confirmed. But professional geologists will want to have the final word on confirming them.

In addition to shatter cones, rock samples were thought to contain shocked quartz because the criss-cross fractures looked like examples in online documents. But this group of volunteers doesn’t have equipment for proper photography of shocked quartz. If found, that would be another way to prove the impact origin of the rocks.

Columnar jointed columns hundreds of feet tall appear on some bluffs in locations that appeared consistent with part of a slowly cooling crater floor. But that alone only helps as part of a bigger picture, because volcanoes can have lava cool in columnar joints as well.

They also found local geological studies which described oddities which could be explained by an impact event. Layers of rocks in the mining district called Sulphur left geologists with a mystery about the cause of chemical alterations since 1980. The group compared it with information in online geological texts like “Traces of Catastrophe” by Dr Bevan M French of the Smithsonian Institution. Layers of impact ejecta seemed to explain the rock layers better than the previous theory about acid uniformly cooking the rocks across the region, and only in one layer of rocks. A separate 1980 study 40 miles away identified an immense air-fall tuff layer in the Soldier Meadows area as having been deposited in a single unit, yet couldn’t locate the volcano which produced this enormous volume. Fault diagrams published online by a mining operation at Sulphur on the edge of the circular structure from the satellite photo also look like curved terraced faults in the wall of a crater.

The mining geologists who wrote papers from 1980 to 2002 had not mentioned the possibility of a crater. But they were each gathering single puzzling pieces of information. A larger image seemed to be forming when putting the pieces together. The group hopes the information will be helpful to geologists who do further work in the region.

The theory hasn’t been put to any test by professionals yet. Some responses point out that the elliptical region reported as the possible impact crater could also be the volcanic caldera that the 1980 study was looking for. If so, such a large volcanic caldera would still be a significant discovery for the region.

This will remain officially a mystery for a while until the professional geologists get to study it. There is a lot of information available online for those who are interested.

Saturday, June 30, 2007

Glasgow International Airport in Renfrewshire, Scotland was evacuated after a green Jeep Cherokee struck the airport’s terminal building and burst into flames at 1511 BST.

An eyewitness told the BBC that “[A] man was on fire.” All flights are grounded, and two men have been arrested and the United Kingdom has raised the national threat level to “critical” which means another terror attack is imminent.

Eyewitnesses described a Jeep speeding toward the building with flames coming out from underneath. They also reported seeing two Asian men in the car, one of whom was on fire.

The BBC quoted an eyewitness as saying that two attempts were made to ram the Jeep through the wall, and that the passenger was holding a lit Molotov Cocktail and made several attempts to throw the bottle.

The Strathclyde Police Chief announced that the event is being linked to the earlier attempted car bombings in London, and as such is being treated as a terrorist investigation.

Eyewitnesses are now saying that one of the two men was pouring bottles of petrol into the car’s interior and onto himself, before running from the car, on fire, into the main terminal building. Witnesses have also reported that gas cylinders were removed by bystanders from the burning vehicle.

According to the BBC, the driver of the vehicle put up a violent struggle before being overpowered by the police and public. One person who tackled him was Stephen Clarkson, a member of the public.

Richard Gray, an eyewitness to the event, stated “There was an Asian guy who was pulled out of the car by two police officers.”

Seven people have been taken to local hospitals with injuries.

Police said that this incident was a deliberate attempt and not a road accident. Officials have also said that the incident is connected to earlier attempted car bombings in London the day before.

Two people have been arrested, one of whom was badly burned. Seven known casualties, including the Asian male have been taken to the Royal Alexandra Hospital, Paisley.

While the suspect was being treated in the hospital, a suspect device was discovered in the hospital, resulting in the partial evacuation of the building while the device was moved to a safe area. This object later turned out to be mundane, although initial reports believed it to be a suicide belt.

The BBC announced that the Prime Minister is being kept fully informed. He chaired a meeting of Civil Contingencies Committee (COBRA) at 1900 (BST), after which the Home Secretary, Jacqui Smith, announced that the national threat level been elevated from “Severe” to “Critical”, meaning another attack is expected “imminently.”

Officials at Edinburgh Airport have said that all cars are being turned away from the airport, and at Heathrow in London, passengers are being advised not to bring private cars near to the terminal buildings. Some passengers were kept waiting in planes while the area was secured.

The first bomber, who was taken to Govan high security prison, has now been interviewed, though no further statements from Strathclyde police have been forthcoming. The second bomber, who was taken to the Royal Alexandria hospital in Paisley, is listed in critical condition tonight, and is being kept under 24-hour guard.

2,300 passengers who were due to set off from Glasgow Airport today have been driven by coach to a conference centre, where a reception area has been set up for them.

Two people were arrested by The Metropolitan Police Anti-Terrorist Branch on the M6 motorway in Cheshire in connection with the Glasgow International Airport attack and attempted London car bombings.

The Prime Minister Gordon Brown is expected to hold another COBRA meeting with other members of the Cabinet today. This will be the fifth COBRA meeting in 48 hours.