Pearlman: I think Bobby Petrino is slime

Bobby Petrino was named head coach at Western Kentucky, months after being embroiled in scandal at University of Arkansas

STORY HIGHLIGHTS

• Bobby Petrino was named the new football coach at Western Kentucky this week


• Hiring came just months after he was fired from Arkansas amid scandal


• Jeff Pearlman says, sadly, this is no surprise in big-time college sports


• He says the vast majority of players are ultimately hurt by the behavior of coaches and administrators

Editor's note: Jeff Pearlman is the author of 'Sweetness: The Enigmatic Life of Walter Payton.' He blogs at jeffpearlman.com. Follow him on Twitter.

(CNN) -- I have a dog named Norma.

She is a small beige cockapoo who barks at the mailman.

I would not trust Bobby Petrino to watch her.

Jeff Pearlman

I also would not trust Bobby Petrino to take my car in for a tire change. I would not trust Bobby Petrino to deposit my Aunt Ruth's Social Security check. I wouldn't trust him to clean my bowling ball, shop for a Christmas ham, change a twenty for two tens, tell me the time or recite the proper lyrics to Blind Melon's "No Rain."

This is not because I am a particularly untrusting person.

No, it's because I think Bobby Petrino is slime.

In case you missed the news, two days ago Western Kentucky University held a press conference to announce that Petrino, undeniably one of the nation's elite football minds, had agreed to a four-year, $850,000 per year deal to take over the Hilltoppers.

With nearly 400 giddy sports fanatics in attendance, Petrino, standing alongside Todd Stewart, the school's athletic director, spoke of honor and loyalty and love and redemption. The ensuing press release, issued by Western Kentucky's sports information department, was straight out of Disney: 101. It made Petrino sound like a cross between Vince Lombardi, Martin Luther King and Gandhi; God's gift to young men seeking to better themselves.

Petrino fired as Arkansas head football coach

What it failed to mention—and what the school desperately wants everyone to fail to mention—is that Petrino may well be the least ethically whole man in the, ahem, ethically whole-deprived world of Division I collegiate sports.

Why, it was only seven months ago that Petrino, at the time the University of Arkansas' head coach, was riding his motorcycle when he crashed along Highway 16 near Crosses, Arkansas.

When asked by school officials to explain what had happened, he failed to mention that, eh, also on the bike was Jessica Dorrell, a 26-year-old former Razorbacks volleyball player who worked as the student-athlete development coordinator for the football program. It turned out that Petrino, a married father of four, was not only having an affair with Dorrell (who was engaged at the time), but was a key voice on the board that hired her for the position when she wasn't even remotely qualified.

During an ensuing university investigation, it was determined that Petrino made a previously undisclosed $20,000 cash gift to Dorrell as a Christmas present.

Ho, ho, ho.

To his credit, Jeff Long, the school's athletic director, defied the wishes of every pigskin-blinded Razorback fan and fired Petrino. In a statement, he rightly wrote that, "all of these facts, individually and collectively, are clearly contrary to character and responsibilities of the person occupying the position of the Head Football Coach—an individual who should serve as a role model and a leader for our student-athlete."

Now, ethics and morals and character be damned, Bobby Petrino has returned, spewing off nonsense about second chances (Ever notice how garbage men and bus drivers rarely get the second chances we are all—according to fallen athletic figures—rightly afforded as Americans?) and learning from mistakes and making things right.

Western Kentucky, a school with mediocre athletics and apparently, sub-mediocre standards, has turned to a person who lied to his last employer about the nature of an accident involving the mistress he allegedly hired to a university position she was unqualified to hold. Please, if you must, take a second to read that again. And again. And again.

Bobby Petrino, holder of a Ph.D. in the Deceptive Arts (he also ditched the University of Louisville shortly after signing a long-term extension in 2007, and quit as coach of the Atlanta Falcons 13 game into his first season later that year. He informed his players via a note atop their lockers), will be the one charged with teaching the 17- and 18-year-old boys who decide to come to Bowling Green about not merely football, but life. He will be their guide. Their compass. Their role model.

Bobby Petrino and social media prove a bad mix

Sadly, in the world of Division I sports, such is far from surprising. This has been a year unlike any other; one where the virtues of greed and the color of green don't merely cloak big-time college athletics, but control them. In case you haven't noticed, we are in the midst of a dizzying, nauseating game of Conference Jump, where colleges and universities—once determined to maintain geographic rivals in order to limit student travel—have lost their collective minds.

The University of Maryland, a charter member of the ACC, is headed for the Big Ten. The Big East—formerly a power conference featuring the likes of Syracuse, Georgetown, St. John's and Connecticut—has added Boise State, San Diego State, Memphis, Houston, Southern Methodist and Navy. Idaho moved from the WAC to the Big Sky, Middle Tennessee State and Florida Atlantic went to Conference USA, the University of Denver—a member of the WAC for approximately 27 minutes—joined the Summit League. Which, to be honest, I didn't even know existed.

Rest assured, none of these moves (literally, nary a one) were conducted with the best interests of so-called student-athletes in mind. New conferences tend to offer increased payouts, increased merchandising opportunities, increased exposure and increased opportunities to build a new stadium—one with 80,000 seats, 100 luxury boxes, $20 million naming rights, $9 hot dogs and the perfect spot for ESPN to broadcast its Home Depot pregame show.

Why, within 24 hours of quarterback Johnny Manziel winning the Heisman Trophy, Texas A&M was hawking Heisman T-shirts for $24 on its website (Or, for a mere $54.98, one can purchase his No. 2 jersey).

Percentage of the dough that winds up in Manziel's pocket? Zero.

After another spectacular exit, Petrino eyes football return

That, really, is the rub of it all; of Petrino's crabgrass-like revival; of coaches bounding from one job for another (even as players can only do so after sitting out a year); of Rutgers moving west and San Diego State moving east and athletic department officials moving on up (to a penthouse apartment in the sky); of $54.98 jerseys.

It's the athletes ultimately getting screwed.

Sure, for the 0.5% of Division I football players who wind up in the NFL, the deal is a sweet one. The other 99.5%, however, are mere pawns, sold a dizzying narrative of glory and fame and lifelong achievement, but, more often than not, left uneducated, unfulfilled and physically battered.

They are told a coach will be with them for four years—then watch as said figure takes a $2 million gig elsewhere but, hey, only because it was right for him and his family.

They are told they will receive a great education, then find themselves stuck on a six-hour flight from California to Newark, New Jersey. They are told that these will be the greatest years of their life, that the college experience is a special one, that only the highest of standards exist.

Then they meet their new coach: Bobby Petrino.

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The opinions expressed in this commentary are solely those of Jeff Pearlman.

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Hundreds pack Conn. church for vigil after rampage

Updated 11:39 PM ET

NEWTOWN, Conn. Twenty-six candles — one for each of the victims — flickered on the altar Friday as hundreds of grief-stricken residents gathered for a vigil in memory of the children and staff killed in a shooting rampage at a school in this Connecticut town.

With the church filled to capacity, hundreds spilled outside, holding hands in circles in the cold night air and saying prayers. Others sang "Silent Night" or huddled near the windows of St. Rose of Lima Roman Catholic church.

"Many of us today and in the coming days will rely on what we have been taught and what we believe, that there is faith for a reason," Gov. Dannel P. Malloy said at the vigil Mass.

The residents were gathered to mourn those whose lives were lost when a 20-year-old man killed his mother at their home, then descended on Sandy Hook Elementary School, opening fire as youngsters cowered in fear amid the sounds of gunshots and screams. Twenty children were among the 26 dead at the school.

The shooter, Adam Lanza, armed with at least two handguns, committed suicide, authorities said.

Even though there were 26 candles on the altar, Monsignor Robert Weiss said it was important to remember everyone who died, including Lanza and his mother.

"Ours is not to judge or to question," he told reporters after the service. "But we are really holding in our hearts especially the children and the staff of the school."

"These 20 children were just beautiful, beautiful children," Weiss said. "These 20 children lit up this community better than all these Christmas lights we have. ... There are a lot brighter stars up there tonight because of these kids."

Weiss said he spent much of the day trying to console those who had lost a child or other family member, adding that he had no answers for their questions of how something so horrible could happen.

But through their sorrow, some parents found solace in remembering their loved ones, he said. One father whose son was killed recalled how his boy had made his first soccer goal this year.

Some parents said they struggled with mixed emotions after their own children survived the massacre that took so many young lives.

After receiving word of the shooting, Tracy Hoekenga said she was paralyzed with fear for her two boys, fourth-grader C.J. and second-grader Matthew.

"I couldn't breathe. It's indescribable. For a half an hour, 45 minutes, I had no idea if my kids were OK," she said.

Matthew said a teacher ordered him and other students to their cubbies, and a police officer came and told them to line up and close their eyes.

"They said there could be bad stuff. So we closed our eyes and we went out. When we opened our eyes, we saw a lot of broken glass and blood on the ground," he said.

David Connors, whose triplets attend the school, said his children were told to hide in a closet during the lockdown.

"My son said he did hear some gunshots, as many as 10," he said. "The questions are starting to come out: `Are we safe? Is the bad guy gone?"'

At the vigil, Newtown High School freshman Claudia Morris, 14, said students had gathered in the school hallways after the massacre, asking each other, "Are you all right? Are you all right?"

"No one has answers to why this happened," she said. "It just seems so unreal."

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Conn. Shooter Adam Lanza: 'Obviously Not Well'

Adam Lanza of Newtown, Connecticut was a child of the suburbs and a child of divorce who at age 20 still lived with his mother.

This morning he appears to have started his day by shooting his mother Nancy in the face, and then drove her car to nearby Sandy Hook Elementary School, armed with two handguns and a semi-automatic rifle.

There, before turning his gun on himself, he shot and killed 20 children, who President Obama later described as "beautiful little kids" between five and 10 years of age. Six adults were also killed at the school. Nancy Lanza was found dead in her home.

A relative told ABC News that Adam was "obviously not well."

Family friends in Newtown also described the young man as troubled and described Nancy as rigid. "[Adam] was not connected with the other kids," said Barbara Frey, who also said he was "a little bit different ... Kind of repressed."

State and federal authorities believe his mother may have once worked at the elementary school where Adam went on his deadly rampage, although she was not a teacher, according to relatives, perhaps a volunteer.

Nancy and her husband Peter, Adam's father, divorced in 2009. When they first filed for divorce in 2008, a judge ordered that they participate in a "parenting education program."

Peter Lanza, who drove to northern New Jersey to talk to police and the FBI, is a vice president at GE Capital and had been a partner at global accounting giant Ernst & Young.

Adam's older brother Ryan Lanza, 24, has worked at Ernst & Young for four years, apparently following in his father's footsteps and carving out a solid niche in the tax practice. He too was interviewed by the FBI. Neither he nor his father is under any suspicion.

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"[Ryan] is a tax guy and he is clean as a whistle," a source familiar with his work said.

Police had initially identified Ryan as the killer. Ryan sent out a series of Facebook posts saying it wasn't him and that he was at work all day. Video records as well as card swipes at Ernst & Young verified his statement that he had been at the office.

Two federal sources told ABC News that identification belonging to Ryan Lanza was found at the scene of the mass shooting. They say that identification may have led to the confusion by authorities during the first hours after the shooting. Neither Adam nor Ryan has any known criminal history.

A Sig Sauer handgun and a Glock handgun were used in the slaying and .223 shell casings – a round used in a semi-automatic military-style rifle -- were also found at the scene. Nancy Lanza had numerous weapons registered to her, including a Glock and a Sig Sauer. She also owned a Bushmaster rifle -- a semi-automatic carbine chambered for a .223 caliber round. However, federal authorities cannot confirm that the handguns or the rifle were the weapons recovered at the school.

Numerous relatives of the Lanzas in New Jersey, Connecticut, Massachusetts, as well as multiple friends, are being interviewed by the FBI in an effort to put together a better picture of the gunman and any explanation for today's tragedy.

"I think the most important thing to point out with this kind of individual is that he did not snap this morning and decide to act out violently," said former FBI profiler Mary Ellen O'Toole. "These acts involve planning and thoughtfulness and strategizing in order to put the plan together so what may appear to be snap behavior is not that at all."

With reporting by Pierre Thomas, Jim Avila, Santina Leuci, Aaron Katersky, Matthew Mosk, Jason Ryan and Jay Shaylor

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Satellite upgrade should let planes slash emissions

A CONSTELLATION of next-generation communications satellites has a surprise in store for the environment. When Iridium Communications begins launching replacement orbiters in 2015, it will do much more than upgrade its satphone services. Piggybacking on the satellites will be a set of transmitters that could revolutionise long-haul flight, save airlines billions of dollars worth of fuel and prevent millions of tonnes of carbon emissions.

For the first time, these devices, known as ADS-B transponders, will enable air traffic controllers to locate aircraft that are far out over oceans, remote deserts or the poles where there is no radar coverage. On top of the greater safety this offers airlines if a plane gets into trouble, say, it will also let controllers pack planes in closer together along optimal flight paths, which will cut carbon emissions.

The ADS-B radio transmitting system is designed to replace expensive, unreliable and low-range radar tracking. It bundles an aircraft's call sign, GPS position, speed and altitude into 112-bit digital packets, which are broadcast continually from the aircraft to the control stations.

But like today's radar, ADS-B radio packets have limited range. "If you're way out in the Pacific or over the North Pole no one's going to pick it up," says Dan Mercer of Iridium Communications. So the transponders piggybacking on the new satellites will pick up those signals and beam them back down to Earth. "For the first time, they'll have total vision of the aircraft at all times," Mercer says.

To avoid potential collisions, planes on long-haul routes out over the oceans currently have to fly quite a long way apart. And only some planes can fly in air lanes with kind tailwinds, while others have to push through less-favourable air currents. "If air traffic control can see where aircraft are precisely, they can fly them all closer together and on the most efficient routes. So they will save fuel and cut emissions," says Mercer.

A study commissioned by Iridium found that between the service's proposed start in 2017 and 2030, the technology should save airlines about $7 billion on fuel and cut carbon dioxide and nitrogen oxide emissions by 35 million tonnes. Another projection that looked at just North Atlantic flights says orbital ADS-B will save airlines $110 million in fuel and 300,000 tonnes in emissions in 2018 alone.

The system can "improve the efficiency of oceanic air traffic management by reducing aircraft separation distances and allowing greater route optimisation", says Pauline Lamb, operations director of National Air Traffic Services in Prestwick, UK. She adds that her organisation is working to fully understand the benefits it will provide.

Meanwhile, one of the world's largest air traffic management firms, Nav Canada of Ottawa, Ontario, has formed Aireon, a joint venture with Iridium. Aireon will operate and sell the transponder service to airlines and air traffic control providers. In combination with other measures - such as use of lighter carbon fibre planes and more efficient engines - Iridium's move should help aviation fight its environmental corner.

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Bell tolls for Beijing's Drum Tower homes

BEIJING - China's capital is to destroy swathes of ancient courtyard homes surrounding a 13th-century landmark in what is being called an effort to preserve Beijing's historical legacy, residents said Friday.

Large numbers of hutong homes, some of them dating back to the Qing dynasty, will be demolished around the Drum and Bell Towers -- a tourist hotspot in Beijing's historic centre -- to make way for a large plaza, they said.

Notices for the "destroy and evict" project are plastered throughout the quarter, dated Wednesday and saying the work was due to be completed by February 24.

Besides protecting the historic legacy of the capital, the project is also aimed at restoring and repairing old and dilapidated buildings, the notices said.

Forced evictions are a major source of unrest in China. Ordinary citizens routinely accuse local officials and developers of cashing in on a property boom by clearing away longstanding residents to pave the way for new projects.

Destroying old homes in central Beijing has particular sensitivity. Critics say new development projects rob the capital of its cultural legacy.

"We have been hearing this was going to happen for years, but now that the notices are up there is not much you can do but leave," said souvenir shop seller Ma Yong.

"When I first saw the notices I felt nothing but despair."

Besides having her rented shop torn down, Ma's small home nearby, where she lives with her retired husband, will also be flattened.

Residents must negotiate compensation with the newly set up "destroy and evict" office near the Bell Tower, with compensation beginning at around 40,000 yuan (US$5,800) per square metre.

Between 130 and 500 homes are to be destroyed, state press reports said.

Officials refused to answer questions when approached by AFP.

"A lot of people are opposed to the campaign, 40,000 yuan per square metre is too cheap, especially with the price of housing in Beijing sky-rocketing," said the manager of a coffee shop near the Drum Tower, who gave her surname only as Wang.

"People are already asking for 150,000 yuan per square metre," she said.

Others said they were happy with the compensation.

"We took the money," said Zhou Li, 51, who was to move out to the suburbs with his elderly parents this weekend after living most of his life near the Bell Tower.

- AFP/ir

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U.N. nuke group, Iran close to deal

Iran President Mahmoud Ahmadinejad said at an October press conference that Iran will not back down on its nuclear program.

STORY HIGHLIGHTS

• NEW: IAEA and Iran close to an agreement, nuclear watchdog chief says


• Iran calls the talks "constructive" but does not address access to Parchin


• Prof. Fereydoun Abbasi Davani is among those being slapped with sanctions


• Abbasi Davani, the head of Iran atomic agency, survived a bomb that Iran blamed on Israel

(CNN) -- The head of a U.N. nuclear watchdog group said Friday a deal with Iran over its nuclear program is likely in January, an agreement that will also allow inspectors to gain access to a military complex where Tehran is believed to be testing nuclear materials.

The news followed reports that the International Atomic Energy Agency wrapped one-day talks in Iran over its nuclear program, widely suspected by the United States and other Western nations as a front for the country's development of nuclear weapons -- a charge Iran has repeatedly denied.

"We have agreed to meet again on 16 January next year, where we expect to finalize the structured approach and start implementing it then shortly after that," IAEA chief inspector Herman Nackaerts told reporters after returning to Vienna, Austria.

The talks between Iran and the International Atomic Energy Agency (IAEA) were aimed at jump-starting negotiations, while allowing agency inspectors to gain access to a military complex where Tehran is suspected of testing nuclear materials.

Access to the Parchin military complex, just outside Tehran, is a key element in the negotiations.

"We have not been given access to Parchin this time. But as you know access to Parchin is part of the structured approach, and we hope as I said that we will implement that shortly," Nackaerts said.

Iran's liaison to IAEA, Ali Asghar Soltanieh, characterized the talks as constructive, according to state-run news agency IRNA. The report stopped short of saying whether the talks included discussion about investigators getting access to Parchin, which was requested at a meeting in November in Vienna, Austria.

The next round of talks were scheduled for January 16, Soltanieh told IRNA. The IAEA also confirmed the talks would continue on that day.

The United States, meanwhile, slapped new sanctions on Iran on Thursday, targeting a handful of companies and individuals it says are providing materials and technology to Tehran's nuclear program.

The sanctions, announced by the U.S. State and Treasury departments, are the latest to target Iran's economy as well as its ability to develop nuclear material.

The sanctions were essential "given Iran's continued intransigence on its nuclear program," said Victoria Nuland, the U.S. State Department spokeswoman.

Among the targets of the latest sanctions is Prof. Fereydoun Abbasi Davani, the head of the Iran Atomic Energy Organization.

Abbasi Davani and his wife survived a car bomb two years ago that Tehran has blamed on Israel. At least four scientists associated with Iran's nuclear program have been killed since 2010.

The companies being targeted with sanctions: FaraTech, the Neda Industrial Group, Aria Nikan Marine Industry, Towled Abzar Boreshi, Iran Pouya, Terjerat Gostar and Tarh O Palayesh.

The sanctions freeze the companies' assets and prohibit business dealings in or with the United States. Companies and banks that defy the U.S. sanctions could be cut off from the U.S. financial system, the State and Treasury departments said.

Iran maintains its nuclear program is for civilian energy purposes only. But the IAEA has said it cannot verify whether the intent of the program is for peaceful means.

A number of Western nations have placed economic and arms-related sanctions on Iran since November 2010 when the IAEA said Tehran was pursuing technology that could be used to build nuclear weapons.

Since then, Iran has been hit by the United States and the European Union with an oil embargo as well as sanctions targeting its banks and number of its businesses.

CNN's Saskya Vandoorne reported from London and Chelsea J. Carter from Atlanta.

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Four people set on fire in Denver home

DENVER Denver police were seeking two suspects after four people were set on fire during an attack at a northwest Denver home.

Police spokesman Sonny Jackson says two men showed up at the front door of the residence at about 7:30 p.m. Thursday. Some words were exchanged, and a woman who answered the door was sprayed with a flammable liquid from a pump bug sprayer and set afire. Three other adults in the home also were sprayed with flammable liquid and set afire.

One victim suffered serious injuries and was transported to a local hospital, while the other three suffered minor injuries.

CBS Denver station KCNC-TV reports the liquid may have been gasoline and the attackers used a propane torch.

The woman who lives at the home told the station two men walked in and demanded drugs, threatening to set the home on fire. She said she believes they may have targeted the wrong home.

Jackson says the matter is under investigation and a motive had not yet been determined.

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What Is a Right-to-Work Law?

This week Michigan became the 24th state in the country to adopt a right-to-work law. The passage of the bill by the state legislature, and eventual signing by Rick Snyder, the state's Republican governor, brought a huge wave of protests in a state with deep union roots.

Right-to-work laws have garnered a lot of national attention in recent years as more states have implemented this legislation that prohibits unions from requiring workers to pay dues as a condition of their employment. The laws are meant to regulate agreements between employers and labor unions that would prohibit the employer from hiring non-union workers.

The laws are particularly divisive--proponents argue that businesses will be more likely to set up shop in the state, while opponents argue that weakening union power will lead to lower wages. Because each state has a variety of factors that must be considered individually when assessing its overall economic standing, it's difficult to fully assess the validity of each side's argument, since you can't isolate the direct effect of these laws on the state's economy.

However, a study conducted in 2007 by Lonnie Stevans of Hofstra University suggested that both sides of the argument are, to some degree, accurate.

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"Findings are that the number of businesses and self-employed are greater on average in right-to-work states, but employment, wages, and per-capita personal income are all lower on average in right-to-work states," Stevans wrote.

But he noted that there was little "trickle down" from the business owners to the workers--the laws benefitted the business owners who did not have to contend with union contracts, but business employees didn't get those same positive effects--as evidenced by the lower salaries on average.

An analysis by ABC News of the most recent seasonally adjusted unemployment rates in states with right-to-work laws vs. those without such laws found that on average, the unemployment rate in states with right to work laws was slightly lower than those without. The average unemployment rate in the 24 states with right-to-work laws was 7 percent, while the average rate in the 26 states plus D.C. that do not have right-to-work laws was just under 7.6 percent--a difference of just under .6 percent.

The state with the lowest unemployment rate in the country--Nebraska at just 3.8 percent unemployment--has such a law in place, as does the state with the highest unemployment rate, Nevada at 11.5 percent.

Support for the laws has often tended to fall along party lines, with Democrats opposing and Republicans supporting. The vast majority of states with right-to-work laws are Republican led, the majority of states without are led by Democrats.

Below is the list of the 24 states with right-to-work laws.

Alabama

Arizona

Arkansas

Florida

Georgia

Idaho

Indiana

Iowa

Kansas

Louisiana

Michigan

Mississippi

Nebraska

Nevada

North Carolina

North Dakota

Oklahoma

South Carolina

South Dakota

Tennessee

Texas

Utah

Virginia

Wyoming

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Search for aliens poses game theory dilemma

SENDING messages into deep space could be the best way for Earthlings to find extraterrestrial intelligence, but it carries a grave risk: alerting hostile aliens to our presence. Game theory may provide a way to navigate this dilemma.

So far the search for extraterrestrial intelligence (SETI) has mostly been restricted to listening for signs of technology elsewhere. Only a few attempts have been made to broadcast messages towards distant stars. Many scientists are against such "active" SETI for fear of revealing our presence. If all aliens feel the same way then no one will be broadcasting, and the chance of detecting each other is limited.

To weigh up the potential losses and gains, Harold de Vladar of the Institute of Science and Technology Austria in Klosterneuburg turned to the prisoner's dilemma, a game-theory problem in which two prisoners choose between admitting their shared crime or keeping quiet, with different sentences depending on what they say. An individual prisoner gets off scot free if they rat on a partner who remains silent, with the silent partner getting a maximum sentence. If they both rat on each other, each gets a medium sentence. By contrast, if both stay silent, both get token sentences - the best overall result.

De Vladar reasoned that the SETI dilemma is essentially the same, but reversed. Mutual silence for prisoners is equivalent to mutual broadcasting for aliens, giving the best results for both civilisations. And while a selfish prisoner rats, a selfish civilisation is silent, waiting for someone else to take the risk of waving "Over here!" at the rest of the universe.

This led de Vladar to apply the mathematics of the prisoner's dilemma to SETI (International Journal of Astrobiology (IJA), doi.org/jx7). In the classic version of the prisoner's dilemma, each selfishly rats on the other. But as we do not know the character of any aliens out there, and as it is difficult to put a value on the benefits to science, culture and technology of finding an advanced civilisation, de Vladar varied the reward of finding aliens and the cost of hostile aliens finding us. The result was a range of optimal broadcasting strategies. "It's not about whether to do it or not, but how often," says de Vladar.

One intriguing insight was that as you scale up the rewards placed on finding aliens, you can scale down the frequency of broadcasts, while keeping the expected benefit to Earthlings the same. Being able to keep broadcasts to a minimum is good news, because they come with costs - rigging our planet with transmitters won't come cheap - and risk catastrophic penalties, such as interstellar war.

Seth Shostak of the SETI Institute in Mountain View, California, says that game theory is a good approach but that there are too many unknowns. Perhaps aliens are not actively broadcasting because they don't need to. Shostak has recently shown that a civilisation even slightly more advanced than ours could use its sun as a "gravitational lens". Such a lens could detect the lights of New York City from up to 500 light years away, once the light has had time to travel that far (IJA, doi.org/jx8). And there are certainly alien star systems that are closer to us than that.

Earth has also been accidently leaking radio and TV signals for the past century, which may have already been picked up. "Any society at least a few centuries beyond the invention of radio will recognise that deliberate transmissions are not the way they will be found," says Shostak. Quick, turn off those lights!

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Cricket: Clarke vows no complacency against Sri Lanka

HOBART, Australia: Skipper Michael Clarke has vowed there will be no complacency in the Test series with Sri Lanka, insisting Australia will improve on their recent performances against South Africa.

The Australians had the better of the opening two Tests against the world number one Proteas only to be crushed by 309 runs in the series decider in Perth last week.

Sri Lanka are ranked sixth in the world, have not won in 10 Tests in Australia over 25 years and are rated outsiders to upset Clarke's team in the three-Test series, beginning in Hobart on Friday.

Former Australian quick Rodney Hogg has rubbished the Sri Lankan attack as the "worst ever" to come to Australia, with Nuwan Kulasekara, Shaminda Eranga and Chanaka Welegedara only having 38 Tests and 99 wickets between them.

Clarke said the third-ranked Australia were focused only on beating Sri Lanka in the first Test since 168-Test great Ricky Ponting's retirement.

"The opposition is irrelevant to how you judge yourself as players," he said.

"Our goal is not to come out and play the same way against Sri Lanka as we did against South Africa.

"We have to learn from that series, take the positives - and I thought there were a lot of positives - and the areas where we need to get better, we need to make sure we do that.

"I'm sure that if we improve on the series against South Africa, we'll continue to have success."

Mitchell Johnson has been left out for the Hobart Test with Australia opting for the pace attack of Ben Hilfenhaus, Peter Siddle and left-armer Mitchell Starc, supplemented by swing bowler Shane Watson and spinner Nathan Lyon.

Recalled Phil Hughes will bat at number three with Watson at four while Clarke and veteran Mike Hussey stay at five and six in the Australian line-up now missing Ponting.

"The strength and advantage we now have in our top four is that all four have opened the batting for Australia," Clarke said.

"So against the new ball they will be very well suited and if we lose early wickets we're still very capable against the new ball which is a real positive."

Clarke also defended the daredevil batting style of opener David Warner, whose second innings dismissal for 29 against South Africa in Perth triggered criticism.

"The one thing we have to understand about Davey, is that the same ball that got him out in Perth, we were all applauding in Adelaide when it went over slips for four. That's the way he plays," he said.

"The only thing I continue to say to Davey is to make sure his intent is there. When the intent is there, his defence is better, his shot selection is better.

"Sometimes it's not going to look great when he gets out, but on the other hand he has the X-factor. He takes the game away from the opposition in the first session of a Test match ... there's not many players in the world that have that talent."

Clarke rated Warner's unbeaten 123 in last year's Hobart Test against New Zealand as among the dashing left-hander's finest.

"I think one of Davey's greatest innings was the hundred he scored here against New Zealand in really tough batting conditions. He still had that intent, even though the wicket was doing a lot. His shot selection was perfect. "In a perfect world, you'd love to bottle that, but you have to have a bit of give and take with Davey."

- AFP/de

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