Tuesday, April 30, 2013

Outraged lawmakers look to change military justice

(AP) ? Outrage over an Air Force officer's decision to overturn a jury's guilty verdict in a sexual assault case has Republicans and Democrats joining forces on ambitious legislation to change the military justice system.

On both sides of the Capitol, lawmakers have interpreted Defense Secretary Chuck Hagel's recent proposal to essentially strip commanding officers of their ability to reverse criminal convictions of service members as an opening to revise the decades-old Uniform Code of Military Justice.

Congress repeatedly has challenged the military's lack of resolve in fighting sexual assault in its ranks, an offense considered far more prevalent than the reported cases of 3,192 in 2011, the most recent figure available. Former Defense Secretary Leon Panetta said that because so few victims report the crime, the real number is closer to 19,000 assaults.

Hagel acknowledged the problem earlier this month in announcing his proposal to eliminate the discretion of a commanding officer to reverse a court martial ruling, except for minor offenses, and to require a commanding officer to explain in writing any changes that are made.

The crime of sexual assault in the ranks "is damaging this institution. There are thousands of victims in the department, male and female, whose lives and careers have been upended, and that is unacceptable," the secretary said.

A single case has set off a recent outcry in Congress.

Lt. Col. James Wilkerson, a former inspector general at Aviano Air Base in Italy, was found guilty last year of charges of abusive sexual contact, aggravated sexual assault and three instances of conduct unbecoming of an officer and a gentleman. The incident involved a female contractor.

Wilkerson was sentenced to a year in prison and dismissal from the service, but Lt. Gen. Craig Franklin, commander of the 3rd Air Force at Ramstein Air Base in Germany, reviewed the case and overturned the jury's verdict of guilty.

Franklin explained in a six-page letter to the Air Force secretary that he found Wilkerson and his wife more believable than the alleged victim.

The ability of a commanding officer to reverse a jury verdict creates a single impression for victims of sexual assault in the military, Sen. Claire McCaskill, D-Mo., told senior officers at a congressional hearing last week. Those women think "no matter what happens at the trial, no matter if they believe me, some general is going to decide I'm a slut," McCaskill said, capturing the frustration and anger over the case.

In the slow-moving Congress, lawmakers are quickly writing legislation to change the Uniform Code of Military Justice, which was established in 1950 and was revised in 1968 and 1983. Separate measures in the House and Senate are expected to become provisions in annual defense policy bills, one of the few pieces of legislation that Congress passes every year.

The Armed Services committees are expected to complete the bills in June.

Sen. Kirsten Gillibrand, D-N.Y., the new chairwoman of the Senate Armed Services personnel subcommittee, is working with members in both parties on legislation to give Judge Advocate General prosecutors the discretion on whether to go to trial, and to largely strip commanding officers of the ability to toss out a verdict.

"Our goal would be to remove all decision-making out of the chain of command about whether to prosecute a case and whether to bring a case to the chain of command," Gillibrand said in a recent interview. "And it would not just be for sexual assault. We're looking at all violent crimes."

Commanding officers would retain their current authority in cases that are the equivalent of misdemeanors in the civilian courts under her measure. And under Hagel's proposal, members of the military who are convicted could still appeal.

Gillibrand said she also has been in contact with Defense Department lawyers, insisting that collaboration with the Pentagon is vital to ensuring that Congress gets the legislation right.

"Everyone knows the current system is not working. Everyone knows that 19,000 sexual assaults and rapes a year is unacceptable," she said. "I think the military has been trying to grasp this for a while now without success and so they may need some outside assistance in looking at it freshly. ... It's not one of those situations where they can say, 'We got this,' because they clearly don't."

In the House, Reps. Mike Turner, R-Ohio, and Niki Tsongas, D-Mass., who have collaborated in the past on legislation to help sexual assault victims in the military, are again writing legislation to address the issue. This time, Turner said the focus is on reining in the power of commanding officers to ensure they cannot set aside a conviction for sexual assault.

"Each year that we have advanced remedies to try to affect sexual assault in the military, we found something unique and egregious was in the Defense Department system that would re-victimize victims of sexual assault. The case of Gen. Franklin setting aside the sexual assault is absolutely one of those," Turner said in an interview.

"When we've talked to representatives at the Pentagon, they've indicated that they in no way ever foresaw that someone would supplant their opinion for that of a tribunal," he said.

Turner's aggressive effort on the issue stems in part from the brutal death of Lance Cpl. Maria Lauterbach, 20, of Vandalia, Ohio, whose charred remains were found in the backyard of the North Carolina home of a former Marine corporal in January 2008.

Lauterbach had accused Cesar Laurean of rape and of being the father of her unborn baby. The two were assigned to the same unit at the Camp Lejeune Marine base. A jury convicted Laurean of murder in the death of his pregnant colleague and he was sentenced to life in prison in August 2010.

"The tragedy of the Maria Lauterbach case is the military knew she'd been subject to sexual assault, left her with the accused, told both of them that as soon as her baby was born that they would do DNA testing and then prosecute him. And then he murdered her and buried her to eliminate the evidence," Turner said. "It's just outrageous to think that she could be left in such a vulnerable position that resulted in her death."

Associated Press

Source: http://hosted2.ap.org/APDEFAULT/89ae8247abe8493fae24405546e9a1aa/Article_2013-04-30-Military%20Sexual%20Assault/id-11b0f88abca141e3adfc491a077a3282

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In a first, black voter turnout rate passes whites

WASHINGTON (AP) ? America's blacks voted at a higher rate than other minority groups in 2012 and by most measures surpassed the white turnout for the first time, reflecting a deeply polarized presidential election in which blacks strongly supported Barack Obama while many whites stayed home.

Had people voted last November at the same rates they did in 2004, when black turnout was below its current historic levels, Republican Mitt Romney would have won narrowly, according to an analysis conducted for The Associated Press.

Census data and exit polling show that whites and blacks will remain the two largest racial groups of eligible voters for the next decade. Last year's heavy black turnout came despite concerns about the effect of new voter-identification laws on minority voting, outweighed by the desire to re-elect the first black president.

William H. Frey, a demographer at the Brookings Institution, analyzed the 2012 elections for the AP using census data on eligible voters and turnout, along with November's exit polling. He estimated total votes for Obama and Romney under a scenario where 2012 turnout rates for all racial groups matched those in 2004. Overall, 2012 voter turnout was roughly 58 percent, down from 62 percent in 2008 and 60 percent in 2004.

The analysis also used population projections to estimate the shares of eligible voters by race group through 2030. The numbers are supplemented with material from the Pew Research Center and George Mason University associate professor Michael McDonald, a leader in the field of voter turnout who separately reviewed aggregate turnout levels across states, as well as AP interviews with the Census Bureau and other experts. The bureau is scheduled to release data on voter turnout in May.

Overall, the findings represent a tipping point for blacks, who for much of America's history were disenfranchised and then effectively barred from voting until passage of the Voting Rights Act in 1965.

But the numbers also offer a cautionary note to both Democrats and Republicans after Obama won in November with a historically low percentage of white supporters. While Latinos are now the biggest driver of U.S. population growth, they still trail whites and blacks in turnout and electoral share, because many of the Hispanics in the country are children or noncitizens.

In recent weeks, Republican leaders have urged a "year-round effort" to engage black and other minority voters, describing a grim future if their party does not expand its core support beyond white males.

The 2012 data suggest Romney was a particularly weak GOP candidate, unable to motivate white voters let alone attract significant black or Latino support. Obama's personal appeal and the slowly improving economy helped overcome doubts and spur record levels of minority voters in a way that may not be easily replicated for Democrats soon.

Romney would have erased Obama's nearly 5 million-vote victory margin and narrowly won the popular vote if voters had turned out as they did in 2004, according to Frey's analysis. Then, white turnout was slightly higher and black voting lower.

More significantly, the battleground states of Ohio, Pennsylvania, Virginia, Florida and Colorado would have tipped in favor of Romney, handing him the presidency if the outcome of other states remained the same.

"The 2012 turnout is a milestone for blacks and a huge potential turning point," said Andra Gillespie, a political science professor at Emory University who has written extensively on black politicians. "What it suggests is that there is an 'Obama effect' where people were motivated to support Barack Obama. But it also means that black turnout may not always be higher, if future races aren't as salient."

Whit Ayres, a GOP consultant who is advising GOP Sen. Marco Rubio of Florida, a possible 2016 presidential contender, says the last election reaffirmed that the Republican Party needs "a new message, a new messenger and a new tone." Change within the party need not be "lock, stock and barrel," Ayres said, but policy shifts such as GOP support for broad immigration legislation will be important to woo minority voters over the longer term.

"It remains to be seen how successful Democrats are if you don't have Barack Obama at the top of the ticket," he said.

___

In Ohio, a battleground state where the share of eligible black voters is more than triple that of other minorities, 27-year-old Lauren Howie of Cleveland didn't start out thrilled with Obama in 2012. She felt he didn't deliver on promises to help students reduce college debt, promote women's rights and address climate change, she said. But she became determined to support Obama as she compared him with Romney.

"I got the feeling Mitt Romney couldn't care less about me and my fellow African-Americans," said Howie, an administrative assistant at Case Western Reserve University's medical school who is paying off college debt.

Howie said she saw some Romney comments as insensitive to the needs of the poor. "A white Mormon swimming in money with offshore accounts buying up companies and laying off their employees just doesn't quite fit my idea of a president," she said. "Bottom line, Romney was not someone I was willing to trust with my future."

The numbers show how population growth will translate into changes in who votes over the coming decade:

?The gap between non-Hispanic white and non-Hispanic black turnout in 2008 was the smallest on record, with voter turnout at 66.1 percent and 65.2 percent, respectively; turnout for Latinos and non-Hispanic Asians trailed at 50 percent and 47 percent. Rough calculations suggest that in 2012, 2 million to 5 million fewer whites voted compared with 2008, even though the pool of eligible white voters had increased.

?Unlike other minority groups, the rise in voting for the slow-growing black population is due to higher turnout. While blacks make up 12 percent of the share of eligible voters, they represented 13 percent of total 2012 votes cast, according to exit polling. That was a repeat of 2008, when blacks "outperformed" their eligible voter share for the first time on record.

?White voters also outperformed their eligible vote share, but not at the levels seen in years past. In 2012, whites represented 72 percent of total votes cast, compared to their 71.1 percent eligible vote share. As recently as 2004, whites typically outperformed their eligible vote share by at least 2 percentage points. McDonald notes that in 2012, states with significant black populations did not experience as much of a turnout decline as other states. That would indicate a lower turnout for whites last November since overall voter turnout declined.

?Latinos now make up 17 percent of the population but 11 percent of eligible voters, due to a younger median age and lower rates of citizenship and voter registration. Because of lower turnout, they represented just 10 percent of total 2012 votes cast. Despite their fast growth, Latinos aren't projected to surpass the share of eligible black voters until 2024, when each group will be roughly 13 percent. By then, 1 in 3 eligible voters will be nonwhite.

?In 2026, the total Latino share of voters could jump to as high as 16 percent, if nearly 11 million immigrants here illegally become eligible for U.S. citizenship. Under a proposed bill in the Senate, those immigrants would have a 13-year path to citizenship. The share of eligible white voters could shrink to less than 64 percent in that scenario. An estimated 80 percent of immigrants here illegally, or 8.8 million, are Latino, although not all will meet the additional requirements to become citizens.

"The 2008 election was the first year when the minority vote was important to electing a U.S. president. By 2024, their vote will be essential to victory," Frey said. "Democrats will be looking at a landslide going into 2028 if the new Hispanic voters continue to favor Democrats."

___

Even with demographics seeming to favor Democrats in the long term, it's unclear whether Obama's coalition will hold if blacks or younger voters become less motivated to vote or decide to switch parties.

Minority turnout tends to drop in midterm congressional elections, contributing to larger GOP victories as happened in 2010, when House control flipped to Republicans.

The economy and policy matter. Exit polling shows that even with Obama's re-election, voter support for a government that does more to solve problems declined from 51 percent in 2008 to 43 percent last year, bolstering the view among Republicans that their core principles of reducing government are sound.

The party's "Growth and Opportunity Project" report released last month by national leaders suggests that Latinos and Asians could become more receptive to GOP policies once comprehensive immigration legislation is passed.

Whether the economy continues its slow recovery also will shape voter opinion, including among blacks, who have the highest rate of unemployment.

Since the election, optimism among nonwhites about the direction of the country and the economy has waned, although support for Obama has held steady. In an October AP-GfK poll, 63 percent of nonwhites said the nation was heading in the right direction; that's dropped to 52 percent in a new AP-GfK poll. Among non-Hispanic whites, however, the numbers are about the same as in October, at 28 percent.

Democrats in Congress merit far lower approval ratings among nonwhites than does the president, with 49 percent approving of congressional Democrats and 74 percent approving of Obama.

William Galston, a former policy adviser to President Bill Clinton, says that in previous elections where an enduring majority of voters came to support one party, the president winning re-election ? William McKinley in 1900, Franklin D. Roosevelt in 1936 and Ronald Reagan in 1984 ? attracted a larger turnout over his original election and also received a higher vote total and a higher share of the popular vote. None of those occurred for Obama in 2012.

Only once in the last 60 years has a political party been successful in holding the presidency more than eight years ? Republicans from 1980-1992.

"This doesn't prove that Obama's presidency won't turn out to be the harbinger of a new political order," Galston says. "But it does warrant some analytical caution."

Early polling suggests that Democrat Hillary Rodham Clinton could come close in 2016 to generating the level of support among nonwhites as Obama did in November, when he won 80 percent of their vote. In a Fox News poll in February, 75 percent of nonwhites said they thought Clinton would make a good president, outpacing the 58 percent who said that about Vice President Joe Biden.

Benjamin Todd Jealous, president of the NAACP, predicts closely fought elections in the near term and worries that GOP-controlled state legislatures will step up efforts to pass voter ID and other restrictions to deter blacks and other minorities from voting. In 2012, courts blocked or delayed several of those voter ID laws and African-Americans were able to turn out in large numbers only after a very determined get-out-the-vote effort by the Obama campaign and black groups, he said.

Jealous says the 2014 midterm election will be the real bellwether for black turnout. "Black turnout set records this year despite record attempts to suppress the black vote," he said.

___

AP Director of Polling Jennifer Agiesta and News Survey Specialist Dennis Junius contributed to this report.

EDITOR'S NOTE _ "America at the Tipping Point: The Changing Face of a Nation" is an occasional series examining the cultural mosaic of the U.S. and its historic shift to a majority-minority nation.

Source: http://news.yahoo.com/first-black-voter-turnout-rate-passes-whites-115957314.html

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Indian arrested for letting son, 9, drive Ferrari

NEW DELHI (AP) ? Police in India have arrested a man who allowed his 9-year-old son to drive his Ferrari.

Mohammed Nisham was arrested on charges of endangering the life of a child and allowing a minor to drive, said Inspector Biju Kumar. He was released after posting bail of 5,000 rupees ($92), Kumar said.

Nisham's wife filmed the boy driving the sports car on his 9th birthday two weeks ago with his 5-year-old brother in the passenger seat. The video was widely watched on YouTube and created an outrage across India, causing police to file charges.

India's economic boom has created a class of super-rich, whose excesses are frequently in the news.

Police Inspector M.V. Verghese said the boy's father, who has a thriving tobacco and real estate business, owns 18 cars worth an estimated $4 million.

Nisham turned himself in at a police station near the port city of Kochi in the southern state of Kerala, Kumar said.

Police have impounded the Ferrari, but it will be returned to him in a few days after police complete the paperwork for the case, police said.

The boy's parents were unabashed. "I am proud of him. He's been driving since he was 5," said his mother, Amal Nisham.

She said the boy has also driven the family's Lamborghini and Bentley and other cars.

"It was his 9th birthday, and since he was insisting for months, we allowed him to drive the Ferrari. He is a cautious and confident driver," she told television channel NDTV.

"It's not easy for a child to achieve such a feat at this young age," she said.

___

Online:

http://www.youtube.com/watch?v=HYUnp7G9fBo

Associated Press

Source: http://hosted2.ap.org/APDEFAULT/aa9398e6757a46fa93ed5dea7bd3729e/Article_2013-04-29-India-Kid's%20Ferrari/id-055d4a2e8bf742ddae4aa2b896781eb4

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Google's virtual assistant invades Siri's turf

(AP) ? Google is trying to upstage Siri, the sometimes droll assistant that answers questions and helps people manage their lives on Apple's iPhone and iPad.

The duel begins Monday with the release of a free iPhone and iPad app that features Google Now, a technology that performs many of the same functions as Siri.

It's the first time that Google Now has been available on smartphones and tablet computers that aren't running on the latest version of Google's Android software. The technology, which debuted nine months ago, is being included in an upgrade to Google's search application for iOS, the Apple Inc. software that powers the iPhone, iPad and iPod Touch. It's up to each user to decide whether to activate Google Now within the redesigned search app.

Google Now's invasion of Siri's turf marks Google Inc.'s latest attempt to lure iPhone and iPad users away from a service that Apple built into its own devices.

Google quickly won over millions of iPhone users in December when it released a mapping application to replace the navigation system that Apple dumped when it redesigned iOS last fall. Apple's maps application proved to be far inferior to Google's ousted service. The app's bugs and glitches made Apple the butt of jokes and fueled demand for Google to develop a new option.

Apple has been losing to Google on other fronts in a rapidly growing mobile computing market, an arena that was revolutionized with the iPhone's release in 2007. Smartphones and tablet computers running Google's free Android software have been steadily expanding their market share in recent years, partly because they tend to be less expensive than the iPhone and iPad. At the end of 2012, Android devices held about 69 percent of the smartphone market while iOS held about 19 percent, according to the research firm IDC.

Android's success has been particularly galling for Apple because its late CEO Steve Jobs believed Google stole many of its ideas for the software from the iPhone. That led to a series of court battles over alleged patent infringement, including a high-profile trial last year that culminated in Apple winning hundreds of millions in damages from Samsung Electronics, the top seller of Android phones. That dispute is still embroiled in appeals.

The rise of Android also is squeezing Apple's profit margins, and has contributed to a 40 percent drop in the company's stock price since it peaked at $705.07 last September around the time that the iPhone 5 came out.

Android's popularity is good news for Google because the company's services are built into most versions of the operating system. That brings more traffic to Google services, creating more opportunities for the company to sell ads ? the main source of Google's revenue.

Siri, billed by Apple as an "intelligent feature." Since the technology's release in October 2011, Apple has made it a centerpiece of some marketing campaigns that depict Siri and its automated female voice as an endearing and occasionally even pithy companion.

When asked for an opinion about Google Now, Siri responded: "If it's all the same to you, I'd rather Google later."

Google believes its Siri counterpart is smarter because Google Now is designed to learn about a user's preferences and then provide helpful information before it's even asked to do so. The technology draws upon information that Google gleans from search requests other interactions with the company's other services. Knowing a person's location also helps Google Now serve up helpful information without being asked.

"This concept of predicting your needs and showing you them at the right time is unique to Google Now," said Baris Gultekin, Google Now's director of product management. "We want computers to do the hard work so our users can focus on what matters to them so they can get on with their lives."

If the technology is working right, Google Now is supposed to do things like automatically tell people what the local weather is like when they awaken to help decide what to wear and provide a report on traffic conditions for the commute to work. During the day, Google Now might provide an update on the score of a user's favorite sports team or a stock quote of a company in a user's investment portfolio. On a Friday evening, Google Now might offer suggestions for movies to see or other weekend events tailored to a user's interests. For international travelers, Google Now might provide currency conversion rates, language translations of common phrases and the time back home.

Most of this automatic information is provided in summaries that Google calls "cards." Like Siri, Google Now also is equipped with voice technology that allows it to respond to questions and interact with users, though it hasn't shown the wit that amuses some of Siri's users.

The Google Now app for iOS isn't as comprehensive as the Android app, which only works on devices running on the latest version of Android ? known as "Jelly Bean." Some of the Android features missing from Google Now's iOS app include cards for showing airline boarding passes and movie tickets bought though online vendor Fandango. Both of those options are available on the iOS through Apple's built-in Passbook feature that's designed to be a digital wallet.

Google Now's expansion on to the iOS underscores Google's ambitions for the service. The company, which is based in Mountain View, Calif., views it as a pivotal tool in its effort to peer deeper into its users' brains. In doing so, Google believes it will be able to provide more useful services and also show more relevant ads. For Google Now to become more intuitive, it needs to widen its availability.

"The more you use Google Now, we will have a better chance of understanding what your needs are and providing you with the right information," Gultekin said. "It's a virtuous cycle."

Gultekin declined to discuss whether there are plans to make Google Now apps for mobile devices running on Microsoft's Windows system. He also refused to comment on speculation circulating in technology blogs that a Web version of Google Now will be offered as a replacement for iGoogle, a tool that allows people to encircle the Google search engine with a variety of services suited to their tastes. IGoogle is scheduled to close in November.

Associated Press

Source: http://hosted2.ap.org/APDEFAULT/495d344a0d10421e9baa8ee77029cfbd/Article_2013-04-29-Google-Apple-Dueling%20Assistants/id-636531294cf7433eb0077c22e032a924

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Emotional Cooking? | Ditch Chicken ~ A Food & Drink Adventure

VeggiesI had one of those days at work?

You know, one of those days where the reality of exactly how much is out of my control came into focus.? Acute focus.

Being the type of girl who likes control, this frustrates me to no end.

I?m a counselor, so I?m reminded nearly every day of exactly how much is beyond my influence. One of the first rules of counseling is to accept that you can?t change everything.??And that sometimes things just suck.

This reality slapped me in the face?on a daily basis in a former life, when I worked as a mental health counselor.? Now I work in higher ed. The slaps are still there, they just come less frequently.? Sometimes they come from places that I don?t expect.? Today was one of those days.

Fortunately , I come home to Jason.? He listens to me (not that counselors can say much), offers me a hug, a glass of wine, and a refill if I need it.

We cook dinner.? Life gets better.? I let go a little.

There?s something about chopping vegetables that?s therapeutic after a rough day.? The focus that?s required to dice and mince without losing a finger overrides my attempts to wrap my head around the things I don?t understand or can?t control.

Counseling requires patience and a faith that things will evolve into what they need to over time.? Transforming raw ingredients into a dish is?immediate, and that immediacy is satisfying.

Tonight we pulled together a simple sweet and sour pork dish.? The recipe is courtesy of the?Baltic Maid?blog.? Plenty of chopping and a return to peace.? I?ll worry about what I can and can?t control tomorrow ? tonight we cook, dine, and relax.

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Source: http://ditchchicken.wordpress.com/2013/04/29/emotional-cooking/

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U.S. to Pay Down Debt (WSJ)

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Feast clue to smell of ancient earth

Feast clue to smell of ancient earth [ Back to EurekAlert! ] Public release date: 29-Apr-2013
[ | E-mail | Share Share ]

Contact: Press Office
press.office@admin.ox.ac.uk
44-186-528-3877
University of Oxford

Tiny 1,900 million-year-old fossils from rocks around Lake Superior, Canada, give the first ever snapshot of organisms eating each other and suggest what the ancient Earth would have smelled like.

The fossils, preserved in Gunflint chert, capture ancient microbes in the act of feasting on a cyanobacterium-like fossil called Gunflintia with the perforated sheaths of Gunflintia being the discarded leftovers of this early meal.

A team, led by Dr David Wacey of the University of Western Australia and Bergen University, Norway, and Professor Martin Brasier of Oxford University, reports in this week's Proceedings of the National Academy of Sciences the fossil evidence for how this type of feeding on organic matter called 'heterotrophy' was taking place. They also show that the ancient microbes appeared to prefer to snack on Gunflintia as a 'tasty morsel' in preference to another bacterium (Huroniospora).

'What we call 'heterotrophy' is the same thing we do after dinner as the bacteria in our gut break down organic matter,' said Professor Martin Brasier of Oxford University's Department of Earth Sciences, an author of the paper. 'Whilst there is chemical evidence suggesting that this mode of feeding dates back 3,500 million years, in this study for the first time we identify how it was happening and 'who was eating who'. In fact we've all experienced modern bacteria feeding in this way as that's where that 'rotten egg' whiff of hydrogen sulfide comes from in a blocked drain. So, rather surprisingly, we can say that life on earth 1,900 million years ago would have smelled a lot like rotten eggs.'

The team analysed the microscopic fossils, ranging from about 3-15 microns in diameter, using a battery of new techniques and found that one species a tubular form thought to be the outer sheath of Gunflintia was more perforated after death than other kinds, consistent with them having been eaten by bacteria.

In some places many of the tiny fossils had been partially or entirely replaced with iron sulfide ('fool's gold') a waste product of heterotrophic sulfate-reducing bacteria that is also a highly visible marker. The team also found that these Gunflintia fossils carried clusters of even smaller (c.1 micron) spherical and rod-shaped bacteria that were seemingly in the process of consuming their hosts.

Dr Wacey said that: 'recent geochemical analyses have shown that the sulfur-based activities of bacteria can likely be traced back to 3,500 million years or so a finding reported by our group in Nature Geoscience in 2011. Whilst the Gunflint fossils are only about half as old, they confirm that such bacteria were indeed flourishing by 1,900 million years ago. And that they were also highly particular about what they chose to eat.'

###


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?


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Feast clue to smell of ancient earth [ Back to EurekAlert! ] Public release date: 29-Apr-2013
[ | E-mail | Share Share ]

Contact: Press Office
press.office@admin.ox.ac.uk
44-186-528-3877
University of Oxford

Tiny 1,900 million-year-old fossils from rocks around Lake Superior, Canada, give the first ever snapshot of organisms eating each other and suggest what the ancient Earth would have smelled like.

The fossils, preserved in Gunflint chert, capture ancient microbes in the act of feasting on a cyanobacterium-like fossil called Gunflintia with the perforated sheaths of Gunflintia being the discarded leftovers of this early meal.

A team, led by Dr David Wacey of the University of Western Australia and Bergen University, Norway, and Professor Martin Brasier of Oxford University, reports in this week's Proceedings of the National Academy of Sciences the fossil evidence for how this type of feeding on organic matter called 'heterotrophy' was taking place. They also show that the ancient microbes appeared to prefer to snack on Gunflintia as a 'tasty morsel' in preference to another bacterium (Huroniospora).

'What we call 'heterotrophy' is the same thing we do after dinner as the bacteria in our gut break down organic matter,' said Professor Martin Brasier of Oxford University's Department of Earth Sciences, an author of the paper. 'Whilst there is chemical evidence suggesting that this mode of feeding dates back 3,500 million years, in this study for the first time we identify how it was happening and 'who was eating who'. In fact we've all experienced modern bacteria feeding in this way as that's where that 'rotten egg' whiff of hydrogen sulfide comes from in a blocked drain. So, rather surprisingly, we can say that life on earth 1,900 million years ago would have smelled a lot like rotten eggs.'

The team analysed the microscopic fossils, ranging from about 3-15 microns in diameter, using a battery of new techniques and found that one species a tubular form thought to be the outer sheath of Gunflintia was more perforated after death than other kinds, consistent with them having been eaten by bacteria.

In some places many of the tiny fossils had been partially or entirely replaced with iron sulfide ('fool's gold') a waste product of heterotrophic sulfate-reducing bacteria that is also a highly visible marker. The team also found that these Gunflintia fossils carried clusters of even smaller (c.1 micron) spherical and rod-shaped bacteria that were seemingly in the process of consuming their hosts.

Dr Wacey said that: 'recent geochemical analyses have shown that the sulfur-based activities of bacteria can likely be traced back to 3,500 million years or so a finding reported by our group in Nature Geoscience in 2011. Whilst the Gunflint fossils are only about half as old, they confirm that such bacteria were indeed flourishing by 1,900 million years ago. And that they were also highly particular about what they chose to eat.'

###


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?


AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert! system.


Source: http://www.eurekalert.org/pub_releases/2013-04/uoo-oun042913.php

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