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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Oscar hopeful Haneke fears failure with Mozart

MADRID: Although he is nursing hopes of an Oscar, Austrian film-maker Michael Haneke says he feels doomed to failure with his latest project -- a staging of a Mozart opera in Spain.

"Amour", Haneke's film about an ageing couple that won the Palme d'Or at Cannes last year, is up for five Oscars on Sunday, including for best film and best director.

First, however, the 69-year-old faces another big night -- Saturday's premier of "Cosi Fan Tutte", by his fellow Austrian at Madrid's Teatro Real.

"With Mozart you are condemned to fail. The question is on what level," Haneke, considered one of the greatest and most uncompromising living film-makers, told reporters in Madrid on Wednesday.

"I don't much like talking about opera. I prefer to talk about my films. I see myself more as a film director."

The Madrid show is his second opera project after "Don Giovanni" in Paris in 2007, and "probably my last" before returning to film-making, he added.

"After 'Don Giovanni' I received about 15 offers to direct operas but I rejected them all because I didn't think I was the right person to do them," he said.

Haneke's films such as "The White Ribbon" -- a macabre tale of pre-war Germany for which he won the first of his two Palmes D'Or -- have earned him a reputation for painful subjects.

"Cosi Fan Tutte" is ostensibly a romantic comedy -- the tale of two women who are tricked and tested by their suitors -- but the theatre says its meditation on love and loyalty has its hard side too.

Written by a depressed Mozart when he was having love pains of his own, "Cosi Fan Tutte" is one of the composer's most challenging operas to stage, said the theatre's Belgian director Gerard Mortier.

"It is the most profound and difficult Mozart, with some extraordinarily difficult arias," he said.

Haneke has stage-directed the opera in Madrid under the musical baton of French conductor Sylvain Cambreling.

"Amour" meanwhile examines the intimate life of an elderly man and his dying wife.

"It touches people because it could happen to any family," Haneke said.

"If you are young it could happen to your grandparents. If you're less young, to your parents. And if you're even less young, it could happen to you."

The film is nominated for Oscars in the best film, director, actress, script and foreign film categories.

"I would like to win them all. I would hope to win at least one -- any of them," he said. "I am crossing my fingers."

- AFP/sf

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Making sense of the PS4 game lineup

NEW YORK--So the world didn't exactly get what it wanted out of Sony's PlayStation 4 debut tonight. There was no sight of the actual console itself and details about its specific release date and price were also nowhere to be seen.

Sony's team-up with Gaikai is sure to net some interesting ideas and implementations with cloud streaming, the sharing of game screens, remote play and other concoctions, but it was the games themselves that made the biggest impact.

Those pondering the PS4's gaming prowesses were served an interesting dish. 10 or so major developers were represented in some capacity and on hand to discuss their progress with the new hardware, which consisted of all sorts of fresh media. Some announced new exclusive titles, while others merely showcased proof of concept videos.

So how do these new tidbits of information playout in the grand scheme of things? How does this impact the current PS3 ecosystem and what we (up until now) thought was a concrete list of upcoming software?

Let's take a closer look at each presentation and dig a little deeper. Here are the exclusives:

The first game to debut was Knack, a title being directed by Mark Cerny, who's also the lead on the PS4's hardware. Knack looks like a platform-action title in the vein of Ratchet & Clank or Jak & Daxter and will be an exclusive PS4 title.

Knack

(Credit:
Sarah Tew/CBS Interactive)

Guerilla Games' next chapter in the Killzone series will be called Shadow Fall. The audience in New York was treated to visually brilliant flythrough that eventually morphed into an actual demo of the game being played live. It was loud, violent and ultimately not much of a departure from previous titles in the franchise. However, the big takeaway here is that Shadow Fall's massive scope and size could only be achieved on next-gen hardware.

Killzone: Shadow Fall

(Credit:
Sarah Tew/CBS Interactive)

From the studio that brought us MotorStorm, the next exclusive to debut was DriveClub, a game that looks to create a never-before-seen racing experience by painstakingly recreating every last possible detail of racing machines. There's also a focus here on multiplayer, specifically 3-on-3 racing.

Next up was inFamous: Second Son, the next-gen effort from Sucker Punch, the studio behind the PS3's duo of inFamous games. Second Son looks to build upon the inFamous universe where normal human beings evolve to harness supernatural powers. Some heavy-duty themes of the cost of freedom and privacy issues came to play in this debut.

Media Molecule, the makers of LittleBigPlanet, showed off some interesting technology as well. Citing the mantra of "the tyranny of the polygon," the team teased what their next project would be by demonstrating the use of a Move controller to sculpt 3D objects and characters in a virtual world.

Media Molecule's sculpting demo

(Credit:
Sarah Tew/CBS Interactive)

Wrapping up the short list of announced exclusives was a quick presentation from David Cage, the founder of developer Quantic Dream. His new game, Beyond: Two Souls was announced at last year's E3, but Cage certainly made it seem that the title would see a PS4 release. It's here where we're starting to see a blurring of the PS3/PS4 release calendar and the first of what could be many PS3 titles that actually become PS4 bound.

Indie games had a great night too. Jonathan Blow, the creator of the hit, Braid, was on hand to talk about his next title, The Witness. This wasn't necessarily an announcement, but rather a chance for the world to see much more of a game that doesn't necessarily follow the same formula as most mainstream titles. The Witness will launch along with the PS4, but only with a timed exclusivity.

The Witness

(Credit:
Sarah Tew/CBS Interactive)

What followed after Blow's segment was a parade of third party developers chatting up what their studio's were cooking up for PlayStation 4. It's safe to assume these titles will most likely not be totally exclusive to Sony's system.

Capcom unveiled its next-gen engine, codenamed Panta Rhei, and the first title to be released built upon it. Tentatively titled Deep Down, the game looks like it will be some sort of dungeon-raiding adventure title complete with fire-breathing dragons, in-game slo-mo sequences and gorgeous texture renderings.

Deep Down (working title)

(Credit:
Sarah Tew/CBS Interactive)

Next up was publisher Square Enix showing off the Luminous Studio engine which was used to provide the attending audience with more of a "what's possible" using PS4 hardware. There was no specific game being announced here, just an over-the-top sequence of magic, gunfighting and brilliant visuals.

Square Enix shows off a proof of concept video

(Credit:
Sarah Tew/CBS Interactive)

Ubisoft's time on stage was spent providing a real-time demo of Watch Dogs, the current-gen turned next-gen title that will officially be a PS4 game. Arguably the best demo of the evening, Watch Dogs presents a world where players can hack almost anything in the world around them, using circuit breakers as booby traps and stalling trains to their advantage.

Watch Dogs

(Credit:
Sarah Tew/CBS Interactive)

Blizzard Entertainment made a brief presentation announcing that Diablo III would appear on both the PS3 and PS4.

Finally, Activision spent a few minutes discussing developer Bungie's first foray outside of Microsoft's console, announcing that Destiny will also be a PS3 and PS4 title.

It's tough to completely wrap our heads around the PS3 release calendar and how it will overlap with PS4's. Because the PS4 will not be backwards compatible with PS3 games directly, it's created what is going to be a strange transitional period where we have games available on both platforms. How Gaikai's streaming technology comes into play with PS3 backwards compatibility has still yet to be definitively outlined.

Hopefully this wrap-up provides a bit of clarity to what was certainly an evening of scattered information. It's not worth hoping for things to get much clearer from now until this summer's E3, which should shed much more light on these titles and more.

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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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Pro-family and women-friendly workplaces called for by PAP Women's Wing

Singapore: The Women's Wing of the People' Action Party wants to see bolder government intervention in the drive for pro-family and women-friendly workplaces.

In a position paper submitted to the Ministry of Manpower (MOM) on Wednesday, it called for legislation to allow employees with children below the age of 12-years to request for flexible work arrangements.

Such requests, it said, should be seriously considered by employers.

It's also proposing legislation to allow employees to take no-pay leave for up to one year to take care of their children, and have their positions guaranteed when they return to work.

To champion and implement the necessary Human Resource policy changes, the paper suggested that the government set up a one-stop centre that can also provide training and handle complains.

The Women's Wing also wants to see better protection for freelance and contract workers - to include CPF contributions, medical benefits and injury compensation.

It also suggested a Back to Work Employment credit scheme - similar to the special employment credit scheme for older workers - to offset employers' costs for on-the-job training for women and job redesign.

People's Action Party (PAP) Member of Parliament for West Coast GRC, Ms Foo Mee Har says the government needs to take bold legislative action to ensure a shift towards a pro-family work culture.

- CNA/sf

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HTC One takes display pixel density crown

The HTC One has one eye-popping display.

(Credit:
HTC)

The HTC One has taken the pixel density crown, leaving phones like Retina iPhone 5 in the dust.

First, to get a sense of the HTC One screen's density, a quick comparison to Microsoft's Surface Pro, which has also been praised for its display chops, puts this into perspective.

The Surface Pro packs a resolution of 1,920x1,080 into a 10.6-inch panel. One of the highest pixel densities (208 pixels per inch, to be exact) for a
Windows 8 PC to date.

The HTC One packs that same resolution (1,920x1,080) into a 4.7-inch screen. That's more than 2 million pixels, yielding 468 pixels per inch (ppi).

"That makes it the current record holder for announced/shipping consumer products," Raymond Soneira, president of DisplayMate, told CNET.

Some products get close, though. Last summer, Sharp and LG announced a new class of very high-ppi displays with 440ppi, which is 1,920x1,080 in a 5-inch (phablet) size, Soneira added.

The first shipping product in the U.S. with this display is the
HTC Droid DNA, which began shipping in December and it has a Sharp display, according to Soneira.

And other manufacturers including Samsung are working on this new format. And LG is now also shipping a 440 ppi display, which, though a slightly lower pixel density, is "visually indistinguishable" from HTC One's display, he said.

Close up of HTC One's icons.

(Credit:
HTC)

Sharp is making its 440+ ppi screens using a technology called Continuous Grain Silicon. "It has higher electron mobility than either IGZO or amorphous silicon, which allows for maximum aperture ratio/light transmission," according to Soneira.

Translation: More light can get through the closely packed pixels than conventional technology, leading to brighter very-high-resolution screens.

And what about the inevitable comparison to Apple's Retina display tech?

"Now 468 ppi is substantially higher than the
iPhone 5's 326 ppi. What does that mean visually? In terms of what Apple calls a Retina Display (equivalent to 20/20 Vision), for 20/20 Vision, 10.5 inches is the viewing distance where the eye can just resolve the individual iPhone 326 ppi pixels for people with standard 20/20 Vision."

Soneira continues. "For 468 ppi, the 20/20 Vision pixel resolution distance is 7.4 inches -- much closer than a typical viewing distance for a 4.7 inch display. Watching further away from the minimum viewing distance means the eye can't resolve the pixels and so the high ppi is often wasted."

But not always. "The only place where [this]...level of sharpness is important is for computer generated text and graphics. Where 440 ppi [and above] will make a difference is when people are intently visually studying the display image for fine image details," he said.

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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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Arias Says Violent Sex Preceded Killing

Jodi Arias and her ex-boyfriend, Travis Alexander,, had increasingly violent sex in which he tied her to his bed, twisted her arm, bent her over a desk for anal sex, and made sex videos with her in the hours leading up to the stabbing and shooting frenzy that left Alexander dead.

It was a day in which Arias, 32, inched closer to telling the court how the killing of Alexander took place, but after several hours of increasingly emotional testimony the court was adjourned until Wednesday.

In her sixth day on the stand, Arias tearfully described the sex-filled hours that led to Alexander's death on June 4, 2008. She is charged with murder for killing her former boyfriend, but claims she was forced to kill him self-defense. She could face the death penalty if convicted.

"He tied me up, (on) the bed. It's not my favorite but it's not unbearable," Arias told the court.

She said he used a kitchen knife in the bathroom to cut the rope to the proper length, but she didn't remember whether he left the knife in the bathroom or brought it back to the nightstand in the bedroom.

"There are a lot gaps that day... a lot of things I don't remember that day," she said.

Arias and Alexander then took graphic sexual photos of one another and made a sex video, both of which Arias said were Alexander's ideas. Arias has girlish braids in the pictures.

But the mood of the afternoon turned, she said, when Alexander became angry over a scratched computer disk of photos she gave him. He threw the CD and Arias said she became "apprehensive" of his rising temper.

"I know he's getting angry because Napoleon [Alexander's dog] got up and left the room and he always leaves the room when he gets mad." she testified.

"I don't know that I was consciously thinking (of violence) but I was more tense. I stood up, went to walk over to him, to rub his back and make sure he was okay," she said. "But he grabbed me on the upper arms, spun me around and grabbed my right arm and twisted it behind my back, and bent me over the desk, and pressed up against me."

Charlie Leight/Pool/The Arizona Republic/AP Photo

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"I was scared he was going to throw me or something, kick me," she continued. "He pressed his groin up against my butt, did a few thrusts and then started pulling my pants down."

The pair then had anal sex, which Arias said pacified Alexander.

"I was very relieved. I felt like we had avoided catastrophe. It could have led to another fight," she said.

Instead of a fight, Alexander, who was 27 and a devout Mormon, and Arias decide to go upstairs and take more nude photos of one another. Arias said she hoped the photos would satisfy Alexander over his frustration with the scratched CD.

Evidence introduced earlier in the trial show that Alexander was killed while Arias was photographing Alexander in the shower.

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

Timeline of the Jodi Arias Trial

Earlier, Arias explained that she wasn't planning to visit Alexander during her roadtrip from her home in California, but was convinced by him to spontaneously take a detour to his house for sex and to hang out.

"The very last time I called Travis it was kind of like, I don't know how to describe it, he had been very sweet and was guilting me and making me feel bad that I was taking this big trip without going to see him," Arias said this afternoon.

"When I called him last time it was just like all right, I'm going," she said. "(Sex) was our thing at that time. I wasn't going to go there, stay the night and not do that."

Arias' attorney, Kirk Nurmi, asked her repeatedly on the stand if Arias brought a gun or knife with her on the roadtrip and to Alexander's house. She said that she did not.

She also denied a series of allegations made by the prosecution that she dyed her hair, rented an inconspicuous car, borrowed gas cans, turned off her cell phone, and switched money around her bank accounts as she left for Alexander's house because she was planning to murder him when she got there.

Arias said that her hair remained the same color, auburn-brown, throughout May and June, that she rented a car because her own car was not stable enough for highway travel, that she requested a white car instead of a red one because police pull red ones over more often, and that she transferred money to a business banking account for a tax write-off to classify it as a business trip.

The testimony about the road trip and Arias' planning could be key to the jury as they decide whether the killing was pre-meditated, as the prosecution claims. Arias could face the death penalty if convicted of murder with aggravating factors such as pre-meditation.

Arias said that she "didn't sleep at all last night" before testifying about the dramatic incident today. Her comment was stricken from the record.

Arias also described a barrage of threatening text messages sent by Alexander in which he told her he would exact "revenge" on her soon and called her a "sociopath."

She told the court that Alexander's temper would make her "cower."

The messages show a growing discord between the pair in April 2008, less than two months before Arias killed Alexander.

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