Higgs may spell doom, unless supersymmetry saves us

Lisa Grossman, physical sciences reporter

(Image: CERN)

Is the Higgs boson a herald of the apocalypse? That's the suggestion behind a theory, developed more than 30 years ago, that is back in the headlines this week. According to physicists, the mass of the Higgs-like particle announced last summer supports the notion that our universe is teetering on the edge of stability, like a pencil balanced on its point.

"It may be that the universe we live in is inherently unstable," Joseph Lykken, of the Fermi National Accelerator Laboratory in Batavia, Illinois, said on Monday at a meeting of the American Association for the Advancement of Science. "At some point, billions of years from now, it's all going to be wiped out."

Physicists have been wringing their hands about this scenario since 1982, when theorists Michael Turner and Frank Wilczek published a paper about it in Nature, NBC News points out. The pair showed that the vacuum of space can be in different energy states, and it will be most stable at its lowest energy. Trouble arises if we're not there yet, and we're inhabiting a temporarily stable state that should ultimately collapse.

"The universe wants to be in a different state, so eventually to realize that, a little bubble of what you might think of as an alternate universe will appear somewhere, and it will spread out and destroy us," Lykken said at AAAS.

Enter the Higgs boson, the particle form of the field that gives mass to several fundamental particles. The Higgs field permeates the vacuum of space, which means the mass of the boson and the stability of the vacuum are closely intertwined. Theory predicted that if the Higgs boson is heavier than about 129 gigaelectronvolts (GeV), the universe should be on safe footing.

But in July 2012 physicists at CERN, near Geneva, Switzerland announced that a particle closely matching the Higgs had been found by experiments in the Large Hadron Collider (LHC). The much celebrated particle has a mass of about 126 GeV - light enough to raise fears of instability.

There is still hope for the universe as we know it. Some theorists pointed out that the relationship between the Higgs mass and the vacuum of space depends on the mass of a particle called the top quark. If the top quark's mass is different than we think it is, stability might reign.

There are also anomalies with the Higgs measurement, like the fact that it decays into photons more often than predicted. That hints we may yet find particles from the theory of supersymmetry, which says each ordinary particle has heavier "superpartners". If the Higgs has such a relative, it might save us from destruction. But some of these predicted particles, particularly the superpartners of the top quark, can push the universe back into instability.

The worries may remain unconfirmed for a while. The LHC is shutting down for a two-year break so engineers can prepare the machine to shoot higher-energy particle beams, which are needed to probe for superpartners.

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Del Piero signs for second season Down Under

MELBOURNE: Italian World Cup winner Alessandro Del Piero has signed on for a second season in Australia's A-League as his Sydney FC side push for a play-off place.

"I'm very happy about this news," the Juventus and Italy legend told a press conference after agreeing to activate the second year of a reported US$2 million-a-season contract.

"For sure it's a great moment for me, for Sydney FC," he said, thanking the club for trusting him.

The 38-year-old said he would not carry on if he could not play at a high level.

"In my age, I want to be very honest. We have to see year by year."

Del Piero has already scored 11 goals in 18 matches, a record haul by a Sydney FC player in a single season and been a hit off the pitch too, helping to boost crowds, shirt sales and television ratings.

Sydney FC has fought back from the bottom of the league to fifth place -- within reach of qualification for the playoffs, largely thanks to Del Piero's goals.

"We have a good position but it's not enough, we have six games remaining but we have to push our energy to take a play-off," he said.

"We want to improve for the next year and do better and better every week," he added.

The team's charge for the finals gathered steam, with a 2-1 win over Adelaide United following the signing of Socceroos captain Lucas Neill on Saturday.

An early-season collapse was halted by the December arrival of former Australia coach Frank Farina, quickly turning Sydney FC into the form team.

- AFP/sf

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Teen iOS app developers hit download lottery

The iOS app Finish.

(Credit:
Basil Ltd.)

You wouldn't expect two 16-year-olds to spend their summer break working for free. But, that's exactly what Ryan Orbuch and Michael Hansen did when they created the anti-procrastination iOS app called Finish, which launched January 16.

And, it's paid off. Literally.

As of today, Finish has been downloaded 16,500 times, according to Orbuch. At 99-cents a pop -- that means more than $16,000 in one month, which isn't bad for two teenagers.

The pair came up with Finish when they were agonizing over finals during their sophomore year. The idea was to help people deal with procrastination. For months, they worked on interface, design, and development. By last August they had a beta version of the app and it hit Apple's App Store last month.

One of the most difficult things for app developers to do is get recognized. So, when Finish got selected for recognition in Apple's App Store, it was like Orbuch and Hansen hit the jackpot.

"Finish was chosen as New and Noteworthy on the front page of the App Store for the first week, and it was pretty incredible," Orbuch told CNET in an email. "Since then, we've had a big banner (that I had a bunch of fun designing) at the top of the Productivity category on the store."

The app lets users set short, mid, and long-term tasks. As the date for the task to be done nears, the app notifies the user. The idea is to not let anything sneak up on procrastinators. And, it's not only for high schoolers, Orbuch said.

"We've seen Finish work for an amazing variety of people. From high school students to lawyers, doctors to real estate agents, writers to entrepreneurs, and tons more," Orbuch said. "Though the app was built by students, it wasn't built to be school-specific. Finish is essentially a framework, it's an app that provides the perfect amount of structure to truly reduce stress and ease procrastination for just about anyone."

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NASA's Mars Rover Makes Successful First Drill

For the first time ever, people have drilled into a rock on Mars, collecting the powdered remains from the hole for analysis.

Images sent back from NASA's Mars rover Curiosity on Wednesday confirmed that the precious sample is being held by the rover's scoop, and will soon be delivered to two miniature chemical labs to undergo an unprecedented analysis. (Related: "Mars Rover Curiosity Completes First Full Drill.")

To the delight of the scientists, the rock powder has come up gray and not the ubiquitous red of the dust that covers the planet. The gray rock, they believe, holds a lot of potential to glean information about conditions on an early Mars. (See more Mars pictures.)

"We're drilling into rock that's a time capsule, rocks that are potentially ancient," said sampling-system scientist Joel Hurowitz during a teleconference from NASA's Jet Propulsion Laboratory in California.

A Place to Drill

The site features flat bedrock, often segmented into squares, with soil between the sections and many round gray nodules and white mineral veins.

Hurowitz said that the team did not attempt to drill into the minerals or the gray balls, but the nodules are so common that they likely hit some as they drilled down 2.5 inches (6.3 centimeters).

In keeping with the hypothesis that the area was once under water, Hurowitz said the sample "has the potential of telling us about multiple interactions of water and rock."

The drill, located at the end of a seven-foot (two-meter) arm, requires precision maneuvering in its placement and movement, and so its successful initial use was an exciting and welcome relief. The rover has been on Mars since August, and it took six months to find the right spot for that first drill. (Watch video of the Mars rover Curiosity.)

The flat drilling area is in the lower section of Yellowknife Bay, which Curiosity has been exploring for more than a month. What was previously identified by Curiosity scientists as the dry bed of a once-flowing river or stream appears to fan out into the Yellowknife area.

The bedrock of the site—named after deceased Curiosity deputy project manager John Klein—is believed to be siltstone or mudstone. Scientists said the veins of white minerals are probably calcium sulfate or gypsum, but the grey nodules remain something of a mystery.

Triumph

To the team that designed and operates the drill, the results were a triumph, as great as the much-heralded landing of Curiosity on the red planet. With more than a hundred maneuvers in its repertoire, the drill is unique in its capabilities and complexities. (Watch video of Curiosity's "Seven Minutes of Terror.")

Sample system chief engineer Louise Jandura, who has worked on the drill for eight years, said the Curosity team had made eight different drills before settling on the one now on the rover. The team tested each drill by boring 1,200 holes on 20 types of rock on Earth.

She called the successful drilling "historic" because it gives scientists unprecedented access to material that has not been exposed to the intense weathering and radiation processes that affect the Martian surface.

Mini-laboratories

The gray powder will be routed to the two most sophisticated instruments on Curiosity—the Sample Analysis at Mars (SAM) and Chemistry and Mineralogy (CheMin).

SAM, the largest and most complex instrument onboard, operates with two ovens that can heat the sample up to 1,800°F (982°C), turning the elements and compounds in the rock into gases that can then be identified. SAM can also determine whether any carbon-based organic material is present.

Organics are the chemical building blocks of life on Earth. They are known to regularly land on Mars via meteorites and finer material that rains down on all planets.

But researchers suspect the intense radiation on the Martian surface destroys any organics on the surface. Scientists hope that organics within Martian rocks are protected from that radiation.

CheMin shoots an X-ray beam at its sample and can analyze the mineral content of the rock. Minerals provide a durable record of environmental conditions over the eons, including information about possible ingredients and energy sources for life.

Both SAM and CheMin received samples of sandy soil scooped from the nearby Rocknest outcrop in October. SAM identified organic material, but scientists are still trying to determine whether any of it is Martian or the byproduct of organics inadvertently brought to Mars by the rover. (See "Mars Rover Detects Simple Organic Compounds.")

In the next few days, CheMin will be the first to receive samples of the powdered rock, and then SAM. Given the complexity of the analysis, and the track record seen with other samples, it will likely be weeks before results are announced.

The process of drilling and collecting the results was delayed by several glitches that required study and work-arounds. One involved drill software and the other involved a test-bed problem with a sieve that is part of the process of delivering samples to the instruments.

Lead systems engineer Daniel Limonadi said that while there was no indication the sieve on Mars was malfunctioning, they had become more conservative in its use because of the test bed results. (Related: "A 2020 Rover Return to Mars?")

Author of the National Geographic e-book Mars Landing 2012, Marc Kaufman has been a journalist for more than 35 years, including the past 12 as a science and space writer, foreign correspondent, and editor for the Washington Post. He is also author of First Contact: Scientific Breakthroughs in the Hunt for Life Beyond Earth, published in 2011, and has spoken extensively to crowds across the United States and abroad about astrobiology. He lives outside Washington, D.C., with his wife, Lynn Litterine.

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Arias Leaves Stand After Describing Killing, Her Lies

Jodi Arias stepped down from the witness stand today after mounting an emotional effort to save herself from death row, insisting to the Arizona jury that an explosive fight with ex-boyfriend Travis Alexander led to his death, and that her lies about killing him masked deep regret and plans to commit suicide.

Arias, 32, will now face what is expected to be a withering cross-examination beginning Thursday from prosecutor Juan Martinez, who has been aggressive to many witnesses throughout the trial and who is expected to go after Arias' claim that she was forced to kill Alexander or be killed herself.

She is charged with murder for her ex-boyfriend's death and could face the death penalty if convicted.

Catching Up on the Trial? Check Out ABC News' Jodi Arias Trial Coverage

The day's dramatic testimony started with Arias describing the beginning of the fight on June 4, 2008 when she and Alexander were taking nude photos in his shower and she claims she accidentally dropped his new camera, causing Alexander to lose his temper. Enraged, he picked her up and body slammed her onto the tile floor, screaming at her, she told the jury.

Arias said she ran to his closet to get away from him, but could hear Alexander's footsteps coming after her down the hall. She grabbed a gun from his shelf and tried to keep running, but Alexander came after her, she said.

"I pointed it at him with both of my hands. I thought that would stop him, but he just kept running. He got like a linebacker. He got low and grabbed my waist, and as he was lunging at me the gun went off. I didn't mean to shoot. I didn't even think I was holding the trigger," she said.

"But he lunged at me and we fell really hard toward the tile wall, so at this point I didn't even know if he had been shot. I didn't see anything different. We were struggling, wrestling, he's a wrestler.

"So he's grabbing at my clothes and I got up, and he's screaming angry, and after I broke away from him. He said 'f***ing kill you bitch,'" she testified.

Asked by her lawyer whether she was convinced Alexander intended to kill her, Arias answered, "For sure. He'd almost killed me once before and now he's saying he was going to." Arias had earlier testified that Alexander had once choked her.

Timeline of the Jodi Arias Trial

Jodi Arias Describes Violent Sex Before Shooting Watch Video

Jodi Arias Testifies Ex Assaulted Her, Broke Her Fingers Watch Video

Jodi Arias Gives Explicit Details About Doomed Relationship Watch Video

But Arias' story of the death struggle ended there as she told the court that she has no memory of stabbing or slashing Alexander whose body was later found with 27 stab wounds, a slit throat and two bullets in his head. She said she only remembered standing in the bathroom, dropping the knife on the tile floor, realizing the "horror" of what had happened, and screaming.

"I have no memory of stabbing him," she said. "There's a huge gap. I don't know if I blacked out or what, but there's a huge gap. The most clear memory I have after that point is driving in the desert."

Arias said that she decided in the desert not to admit to killing Alexander, a decision that would last for two years as Arias lied to friends, family, investigators and reporters about what really happened in Alexander's bathroom.

During that time she initially claimed she got lost that night while driving to a friend's house and never went to Alexander's home in Mesa,Ariz. She later changed her story and said two masked people, a man and a woman, burst into the home and killed Alexander and threatened to kill her family if she told anyone what happened.

She eventually confessed to killing her ex-boyfriend, but insisted it was self defense.

"The main reason (for lying) is because I was very ashamed of what happened. It's not something I ever imagined doing. It's not the kind of person I was. It was just shameful," she said. "I was also very scared of what might happen. I didn't want my family to know that I had done that, and I just couldn't bring myself to say that I did that."

"From day one there was a part of me that always wanted to (tell the truth) but didn't dare do that. I would rather have gone to my grave than admit I had done something like that," she said.

Arias said that she continued to lie because she figured she would never get caught; she was planning to kill herself before trial.

"I was concerned with how it would affect my family. I wanted to die. I was going to definitely kill myself," she said. "That was my plan. You can purchase different things in jail and I bought a bunch of Advil... and took it all in the next few days so it was in my system. They have razors for shaving, so I got one and took it apart one night with intentions to slit my wrists."

Arias said she balked at slitting her wrists after accidentally cutting herself, but that she still planned to commit suicide sometime in the future. When she told news reporters that "no jury would convict her," she claims she said it believing that she would be dead before they'd have a chance to put her on trial, Arias testified.

Arias said support from the public and her family eventually led her to change her mind.

"My family remained very supportive, and told me 'it doesn't matter what happens, we love you anyway.' I realized even if I told the truth they would still be there and wouldn't walk away," she testified.

"By the time spring, 2010, rolled around, I confessed. I basically told everyone what I could remember of the day and that the intruder story was all BS pretty much."

She said that her testimony today, a third version of events, was the truth.

Arias was arrested a month after Alexander's death, and prosecutors have argued that her behavior during those weeks showed a lack of remorse for the killing and an attempt to get away with murder.

Arias said today that after she killed Alexander and drove away from his Mesa, Ariz., home in a panic, it dawned on her that police would soon be looking for Alexander's killer, and she decided that she would pretend the bloody confrontation had never happened.

"I knew that it was really bad, that my life was probably done now. I wished it was just a nightmare I could wake up from, but I knew I had messed up pretty badly and the inevitable was going to be something I could not really run from," she testified.

"I didn't want anyone to know that that had happened or that I did it, so I started taking steps in the aftermath to cover it up. I did a whole bunch of things to try to make it seem like I was never there," she said.

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Today on New Scientist: 19 February 2013

Doctors would tax sugary drinks to combat obesity

Hiking the price of fizzy drinks would cut consumption and so help fight obesity, urges the British Academy of Medical Royal Colleges

Space station's dark matter hunter coy about findings

Researchers on the Alpha Magnetic Spectrometer, which sits above the International Space Station, have collected their first results - but won't reveal them for two weeks

Huge telescopes could spy alien oxygen

Hunting for oxygen in the atmospheres of distant exoplanets is a tough job, but a new wave of giant telescopes should be up to the task

Evolution's detectives: Closing in on missing links

Technology is taking the guesswork out of finding evolution's turning points, from the first fish with legs to our own recent forebears, says Jeff Hecht

Moody Mercury shows its hidden colours

False-colour pictures let us see the chemical and physical landscape of the normally beige planet closest to the sun

LHC shuts down to prepare for peak energy in 2015

Over the next two years, engineers will be giving the Large Hadron Collider the makeover it needs to reach its maximum design energy

Insert real news events into your mobile game

From meteor airbursts to footballing fracas, mobile games could soon be brimming with news events that lend them more currency

3D-printing pen turns doodles into sculptures

The 3Doodle, which launched on Kickstarter today, lets users draw 3D structures in the air which solidify almost instantly

We need to rethink how we name exoplanets

Fed up with dull names for exoplanets, Alan Stern and his company Uwingu have asked the public for help. Will it be so long 2M 0746+20b, hello Obama?

A shocking cure: Plug in for the ultimate recharge

An electrical cure for ageing attracted the ire of the medical establishment. But could the jazz-age inventor have stumbled upon a genuine therapy?

Biofuel rush is wiping out unique American grasslands

Planting more crops to meet the biofuel demand is destroying grasslands and pastures in the central US, threatening wildlife

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Swimming: Trickett urges healing after "toxic" Games

SYDNEY: Australian swimmer Libby Trickett called for healing within the sport after reports exposed a "toxic" atmosphere at the London Olympics including drunkenness, deceit and bullying.

Swimming Australia has vowed to restore its standing with the public after the country's much vaunted swimmers disappointed at the 2012 Olympics and inquiries into its culture revealed discipline was loose and the squad lacked leadership.

Trickett, who has won four gold medals at three Olympics, welcomed the news that officials would further investigate allegations against the team, including that some athletes misused prescription drugs as a prank in London.

"That issue has been left unresolved and it needs to be dealt with in order for us to move on," she told the Australian newspaper.

"It probably has gone too long without being dealt with. It certainly does need to be addressed because... if we let this one go, it's a precedent for the future."

She said all swimmers had been "under a cloud" because no individuals had so far been named.

"But if names are named, we will need to support them through the difficult times that lie ahead for them -- and they will be difficult," she said, The Australian reported.

"We need to come together again as a team and what better way to do that than by embracing these swimmers?"

Australia endured its worst swimming haul in decades in London, winning just one gold medal, six silver and three bronze for its lowest tally in the pool since Barcelona in 1992.

The lacklustre performance, in which no individual swimming gold medal was won for the first time since the 1976 Montreal Games, resulted in the commissioning of two independent reports released on Tuesday.

They revealed that morale within the swimming team was so low one athlete referred to London as the "lonely Olympics" as individuals looked after themselves ahead of the team.

- AFP/al

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Higgs Boson calculations add up to new Armageddon scenario

A proton-proton collision event for an experiment generating two high-energy photons.

(Credit:
CERN)

Anyone who thinks the end is nigh with a giant asteroid colliding into Earth may have a new apocalypse scenario to worry about.

It all boils down to the Higgs Boson particle, aka the "God particle."

Calculations that came with the likely discovery of the Higgs Boson last July also show that the particle's mass qualities could spell out the end of the universe said Fermilab theoretical physicist Joseph Lykken yesterday, according to NBC's Cosmic Log.

However, doomsdayers don't need to fret too much, the scientist also said that the likelihood of such a demise is probably tens of billions of years off.

The God particle was likely discovered last year when scientists at the CERN nuclear research facility observed a particle consistent with the Higgs running through the Large Hadron Collider. Until then, the particle was a theoretical idea rather than a sure thing. Higgs is thought to be responsible for mass in the otherwise-already-proven standard model of physics.

Theory on the particle indicates that mass can be transmitted to other fundamental particles in the universe, which is how the possibility of the end of the world comes into play. This idea of mass transference suggests that the universe is not completely stable -- it's actually in a "metastable" state.

"If you use all the physics that we know now, and we do what we think is a straightforward calculation, it's bad news," Lykken said, according to NBC. "The universe wants to be in a different state, so eventually to realize that, a little bubble of what you might think of as an alternate universe will appear somewhere, and it will spread out and destroy us."

Basically, Lykken says that our universe could easily be slapped out by another universe. However, he also said that if it does happen, it will happen at the speed of light -- which means it will be so fast we won't even realize it.

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Florida Python Hunt Captures 68 Invasive Snakes

It's a wrap—the 2013 Python Challenge has nabbed 68 invasive Burmese pythons in Florida, organizers say. And experts are surprised so many of the elusive giants were caught.

Nearly 1,600 people from 38 states—most of them inexperienced hunters—registered for the chance to track down one of the animals, many of which descend from snakes that either escaped or were dumped into the wild.

Since being introduced, these Asian behemoths have flourished in Florida's swamps while also squeezing out local populations of the state's native mammals, especially in the Everglades. (See Everglades pictures.)

To highlight the python problem, the Florida Fish and Wildlife Conservation Commission and its partners launched the 2013 Python Challenge, which encouraged registered participants to catch as many pythons as they could between January 12 and February 10 in state wildlife-management areas within the Everglades.

The commission gave cash prizes to those who harvested the most and longest pythons.

Frank Mazzotti, a wildlife ecologist at the University of Florida and scientific leader for the challenge, said before the hunt that he would consider a harvest of 70 animals a success—and 68 is close enough to say the event met its goals.

It's unknown just how many Burmese pythons live in Florida, but catching 68 snakes is an "exceptional" number, added Kenneth Krysko, senior herpetologist at the Florida Museum of Natural History in Gainesville.

Snakes in the Grass

Finding 68 snakes is impressive, experts say, since it's so hard to find pythons. For one, it's been unusually warm lately in Florida, which means the reptiles—which normally sun themselves to regulate their body temperature—are staying in the brush, making them harder to detect, Krysko said.

On top of that, Burmese pythons are notoriously hard to locate, experts say.

The animals are so well camouflaged that people can stand right next to one and not notice it. "It's rare that you get to see them stretched out—most of the time they're blending in," said Cheryl Millett, a biologist at the Nature Conservancy, a Python Challenge partner.

What's more, the reptiles are ambush hunters, which means they spend much of their time lying in wait in dense vegetation, not moving, she said.

That's why Millett gave the hunters some tips, such as looking along the water's edge, where the snakes like to hang out, and also simply listening for "something big moving through the vegetation."

Even so, catching 68 snakes is "actually is a little more than I expected," said Millett.

No Walk in the Park

Ruben Ramirez, founder of the company Florida Python Hunters, won two prizes in the competition: First place for the most snakes captured—18—and second place for the largest python, which he said was close to 11 feet (3.4 meters) long. The biggest Burmese python caught in Florida, nabbed in 2012, measured 17.7 feet (5.4 meters).

"They're there, but they're not as easy to find as people think," said Ramirez. "You're not going to be stumbling over pythons in Miami." (Related blog post: "What It's Like to Be a Florida Python Hunter.")

All participants, some of whom had never hunted a python before, were trained to identify the difference between a Burmese python and Florida's native snakes, said Millett. No native snakes were accidentally killed, she said.

Hunters were also told to kill the snakes by either putting a bolt or a bullet through their heads, or decapitating them-all humane methods that result "in immediate loss of consciousness and destruction of the brain," according to the Python Challenge website.

Ramirez added that some of the first-time or amateur hunters had different expectations. "I think they were expecting to walk down a canal and see a 10-foot [3-meter], 15-foot [4.5-meter] Burmese python. They thought it'd be a walk in the park."

Stopping the Spread

Completely removing these snakes from the wild isn't easy, and some scientists see the Python Challenge as helping to achieve part of that goal. (Read an opposing view on the Python Challenge: "Opinion: Florida's Great Snake Hunt Is a Cheap Stunt.")

"You're talking about 68 more animals removed from the population that shouldn't be there—that's 68 more mouths that aren't being fed," said the Florida museum's Krysko. (Read about giant Burmese python meals that went bust.)

"I support any kind of event or program that not only informs the general public about introduced species, but also gets the public involved in removing these nonnative animals that don't belong there."

The Nature Conservancy's Millett said the challenge had two positive outcomes: boosting knowledge for both science and the public.

People who didn't want to hunt or touch the snakes could still help, she said, by reporting sightings of exotic species to 888-IVE-GOT-1, through free IveGot1 apps, or www.ivegot1.org.

Millett runs a public-private Nature Conservancy partnership called Python Patrol that the Florida wildlife commission will take on in the fall. The program focuses not only on eradicating invasive pythons but on preventing the snake from moving to ecologically sensitive areas, such as Key West.

Necropsies on the captured snakes will reveal what pythons are eating, and location data from the hunters will help scientists figure out where the snakes are living—valuable data for researchers working to stop their spread.

"This is the most [number of] pythons that have been caught in this short of a period of time in such an extensive area," said the University of Florida's Mazzotti.

"It's an unprecedented sample, and we're going to get a lot of information out of that."

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Former Navy SEAL on Coming Out of Shadows

It used to be that Navy SEALs didn't just operate in the shadows. They trained in them too. Their whole story stayed shrouded in mystery. Their secret missions stayed secret to the rest of us.

But when they got Osama Bin Laden, snatched back an American cargo ship taken by pirates and rescued two air workers held hostage in Somalia, then suddenly, it seemed that SEALs were headline-makers.

Add to that some SEALs wrote books about SEAL adventures and even acted in a movie about the SEAL experience using live ammunition when they made "Act of Valor." They can't quite be called "the military unit that no one ever talked about" any longer.

Watch the full story on "Nightline" TONIGHT at 12:35 a.m. ET

Rorke Denver played Lt. Commander Rorke in "Act of Valor," a film that used dozens of SEALs and went on to gross $80 million at the box office. Now, with the help of a writer, Denver is doing some pretty decent storytelling in a new book, "Damn Few: Making the Modern SEAL Warrior."

He agrees that with SEALs like him telling their stories that these guys are out in the open like never before.

"We are, at this moment in our history, when the heat is on, the missions are getting press and coverage," Denver said.

Acts of Valor: Four Boyfriends Took Bullets to Save Girlfriends Watch Video

'Zero Dark Thirty' Screenwriter Responds to Film's Controversy Watch Video

When asked if it was a good thing, he said, "time will tell."

"We are in the public eye and I think that mythology is something that people are hugely, hugely interested in and they have an appetite for it," Denver said. "So for us with the movie and then also with 'Damn Few' I had an opportunity, I feel, to authentically represent and hopefully do it from an honorable point of view and accurately do so."

It's mostly his own story Denver tells in "Damn Few," how he joined the SEALs after college -- they didn't want him at first.

"I put in my first application and they said no, and I am glad it went that way. I think the community really values resiliency and toughness and focus and a 'never quit' attitude. For me, when they said no I thought, that ain't going to cut it."

Denver didn't quit. He reapplied and went on to survive the SEALs brutal Hell Week and training, joined the team and deployed all over the world, including the deadly Al Anbar province in Iraq when the war there was at its hottest. His family waited for him to return stateside.

"The families, I feel, are the ones who pay the price of our choices," Denver said. "But I didn't appreciate how much I was asking my family to bear and experience it with me. They really are every bit a part of our experience and frankly they are the ones who are back home and praying and believing that you are going to come home."

But even his family didn't quite know what Denver did at work every day.

"I never ask questions about what he does," said his wife, Tracy.

But "Act of Valor" was revealing in that way, and Denver's wife watched the film.

"For me it was incredibly eye-opening to actually see a submarine mission or running around in the jungle, jumping out of a plane, shooting his weapons," she said. "For me, it was like, oh, so this is what you are doing when you are away. I appreciated it actually."

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