Mood-sensing smartphone tells your shrink how you feel

PEOPLE with anxiety, depression or stress are often asked to record their mood changes throughout the day, helping psychologists fine-tune their treatment. But they often forget, recording only sparse information at best. Now an emotion-sensing smartphone app that automatically generates someone's "mood diary" could give psychologists all the data they need.

It's the brainchild of Matt Dobson and Duncan Barclay, founders of speech recognition firm EI Technologies, based in Saffron Walden, UK. Instead of relying on people writing diaries, the app, called Xpression, listens for telltale changes in a person's voice that indicate whether they are in one of five emotional states: calm, happy, sad, angry or anxious/frightened. It then lists a person's moods against the times they change, and automatically emails the list to their psychologist at the end of the day.

To work, the app has to be always on, listening out for the user's voice once every second, whether they are talking to family, friends, colleagues or even pets. It also listens in on phone calls. If the user is silent, the app does nothing. Crucially for the users' privacy, it doesn't record their words, instead seeking out telltale acoustic features – like pitch – that are indicative of emotional state.

This kind of emotion recognition via voice pattern already works well and is a "hot area" of research, says Stephen Cox, head of the speech processing lab at the University of East Anglia in Norwich, UK, who is scientific adviser for the firm.

Initially, Xpression will send 200-millisecond-long acoustic snapshots to a remote server where a machine-learning system will work out a person's emotional state before sending it back to the app for storage. Factors like voice loudness, intensity, changes in pitch and speaking pace allow the system to accurately estimate somebody's emotional state. "We extract acoustic features and let the machine-learning system work it out," says Cox. This ability will be built into the app itself eventually, says Dobson.

There's a strong need for this kind of technology, says Adrian Skinner, a clinical psychologist with the UK's National Health Service in Harrogate, North Yorkshire. "With conditions like depression, people tend to stop doing things like filling in mood diaries. If this app gives us more complete diaries it could help us better find the day-to-day triggers that raise or lower a patient's mood," he says.

The firm is a finalist in a UK government competition to identify the nation's top mobile tech company, to be judged on 26 February. An insurance company has already expressed an interest in using the app to ensure the workplace stress therapy it pays for is effective. Clinical trials are due to take place later this year.

This article appeared in print under the headline "We know how you really feel"

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Cricket: Hyderabad Test still on, says Australia chief

SYDNEY: Australia plan to play the second Test against India in Hyderabad as scheduled next week despite deadly bomb attacks in the city on the eve of the Test series opener, reports said on Friday.

The twin blasts on Thursday killed 14 people and wounded dozens more in a busy neighbourhood in the southern Indian city, raising questions over whether Australia would play the second Test starting on March 2.

But Cricket Australia chief executive James Sutherland told Fairfax newspapers the match was still on as planned as Australia prepared for the opening match in the four-Test series in Chennai starting later Friday.

"As far as I'm concerned we are playing the second Test in Hyderabad next week. That's where we are at," said Sutherland, who is with the team in Chennai.

Sutherland told Fairfax he was happy to continue to Hyderabad where the team is scheduled to arrive on Wednesday.

"We've got great confidence in the BCCI (Board of Control for Cricket in India) and the relevant authorities here to be able to prepare as best as possible for whatever issues may change from day to day," he said.

"We're very comfortable with everything that has been done so far on this tour."

"We'll obviously take advice from relevant authorities and work with the BCCI and others here to make assessments around Hyderabad but at the same time plans have been in place for a long time," Sutherland said.

"At this stage I wouldn't be calling into question things going ahead in Hyderabad."

He added that team manager Gavin Dovey had sent players text messages overnight updating them on the blasts and that security had been stepped up.

Dozens of extra police reportedly surrounded the Chennai hotel where the Australian and Indian teams are staying.

Captain Michael Clarke said his players were focused on the Chennai game.

"From the team's point of view, our focus is wholly and solely on the field because we've got people off the field who are experts in what is going on. We'll be advised by them," he said.

"Our thoughts and prayers are with all the people of Hyderabad who have been affected."

Earlier, media reports raised doubts over the tour.

"Australia's cricket tour of India has been plunged into uncertainty," said the Herald-Sun newspaper, while the Sydney Morning Herald carried a headline "Hyderabad Test in doubt as bombings rock city".

Australia pulled out of a tour to Pakistan in 2008 over security concerns after a series of bombings in the troubled country. They also refused to play any matches in the 1996 World Cup in Sri Lanka after bombings there.

Cricket Australia, which said the safety of players was paramount, earlier said the tourists had received "no information to suggest there is any threat to the team" but that talks were ongoing.

The attacks targeted a Hindu district in the city, a hub of India's computing industry in the southern state of Andhra Pradesh, home to local offices of Google and Microsoft among other Western IT companies.

After the blasts, the Foreign Affairs Department in Canberra warned Australians following the tour in India that terror attacks could happen anywhere.

"We advise you to exercise a high degree of caution in India at this time because of the risk of terrorism, civil unrest, crime and vehicle accidents," the department said.

"Terrorist attacks could occur anywhere at any time in India with little or no warning," it said.

"Possible targets include public places in New Delhi, Mumbai and other major cities, and Indian security and political interests."

However, the overall level of advice for Australians in India has not changed, with the department recommending people exercise a high degree of caution.

No major international cricket has been played in Pakistan since a deadly attack on the Sri Lankan team bus by armed militants in Lahore in 2009.

- AFP/ck

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Zendesk hack snares user data from Twitter, Tumblr, Pinterest

At a time when it seems no company is immune from hackers, user information from three high-profile social-networking sites has been compromised due to a hack at another company.

Customer support service Zendesk revealed today that it had been the victim of a security breach and that information from three of its clients had been downloaded. As first reported by Wired, those three clients are Twitter, Pinterest, and Tumblr.

Zendesk revealed the hack in a company blog post today that said the vulnerability was immediately identified and patched.

Our ongoing investigation indicates that the hacker had access to the support information that three of our customers store on our system. We believe that the hacker downloaded email addresses of users who contacted those three customers for support, as well as support email subject lines. We notified our affected customers immediately and are working with them to assist in their response.

Although Zendesk did not identity the clients by name, some users of the social-networking services began receiving warnings that they may have been affected by the breach. Wired published warnings sent by each company that identified Zendesk as the point of the leak.

One e-mail sent by Tumblr to a CNET associate said hackers may have had access to the subject lines and e-mail addresses of messages sent to Tumblr support.

The subject lines of your emails to Tumblr Support may have included the address of your blog which could potentially allow your blog to be unwillingly associated with your email address.

Any other information included in the subject lines of emails you've sent to Tumblr Support may be exposed. We recommend you review any correspondence you've addressed to support@tumblr.com, abuse@tumblr.com, dmca@tumblr.com, legal@tumblr.com, enquiries@tumblr.com, or lawenforcement@tumblr.com.

Founded in 2007, the cloud-based customer service solution provider announced last month that it had signed up its 25,000th customer.

The hacks come just days after Apple and Facebook revealed that their respective employees' computers fell victim to unauthorized access.

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Oldest Known Wild Bird Hatches Chick at 62

Wisdom, the oldest known wild bird, has yet another feather in her cap—a new chick.

The Laysan albatross (Phoebastria immutabilis)—62 years old at least—recently hatched a healthy baby in the U.S. Midway Atoll National Wildlife Refuge, her sixth in a row and possibly the 35th of her lifetime, according to the U.S. Geological Survey's (USGS) North American Bird Banding Program. (Related: "51-Year-Old Albatross Breaks N. American Age Record [2003].")

But Wisdom's longevity would be unknown if it weren't for a longtime bird-banding project founded by USGS research wildlife biologist Chandler Robbins.

Now 94, Robbins was the first scientist to band Wisdom in 1956, who at the time was "just another nesting bird," he said. Over the next ten years, Robbins banded tens of thousands of black-footed albatrosses (Phoebastria nigripes) and Laysan albatrosses as part of a project to study the behavior of the large seabirds, which at the time were colliding with U.S. Navy aircraft.

Robbins didn't return to the tiny Pacific island—now part of the U.S. Papahānaumokuākea Marine National Monument—until 2002, when he "recaptured as many birds as I could in hopes that some of them would be the old-timers."

Indeed, Robbins did recapture Wisdom—but he didn't know it until he got back to his office at the Patuxent Wildlife Research Center in Laurel, Maryland, and checked her band number in the database.

"That was real exciting, because we didn't think the chances of finding one that old would be that good," Robbins said Wednesday in an interview from his office at the Patuxent center, where he still works.

Chandler Robbins counts birds in Maryland's Patuxent Research Refuge.

Photograph by David H. Wells, Corbis

Albatrosses No Bird Brains

Bigger birds such as the albatross generally live longer than smaller ones: The oldest bird in the Guinness Book of Animal Records, a Siberian white crane (Leucogeranus leucogeranus), lived an unconfirmed 82 years. Captive parrots are known to live into their 80s. (See National Geographic's bird pictures.)

The Laysan albatross spends most of the year at sea, nesting on the Midway Atoll (map) in the colder months. Birds start nesting around five years of age, which is how scientists knew that Wisdom was at least five years old in 1956.

Because albatrosses defend their nests, banding them doesn't require a net or a trap as in the case of other bird species, Robbins said—but they're far from tame.

"They've got a long, sharp bill and long, sharp claws—they could do a job on you if you're not careful how to handle them," said Robbins, who estimates he's banded a hundred thousand birds.

For instance, "when you're not looking, the black-footed albatross will sneak up from behind and bite you in the seat of the pants."

But Robbins has a fondness for albatrosses, and Wisdom in particular, especially considering the new dangers that these birds face.

Navy planes are no longer a problem—albatross nesting dunes were moved farther from the runway—but the birds can ingest floating bits of plastic that now inundate parts of the Pacific, get hooked in longlines meant for fish, and be poisoned by lead paint that's still on some of Midway Atoll's buildings. (Also see "Birds in 'Big Trouble' Due to Drugs, Fishing, More.")

That Wisdom survived so many years avoiding all those hazards and is still raising young is quite extraordinary, Robbins said.

"Those birds have a tremendous amount of knowledge in their little skulls."

"Simply Incredible"

Wisdom's accomplishments have caught the attention of other scientists, in particular Sylvia Earle, an oceanographer and National Geographic Explorer in Residence, who said by email that Wisdom is a "symbol of hope for the ocean." (National Geographic News is part of the National Geographic Society.)

Earle visited Wisdom at her nest in January 2012, where she "appeared serenely indifferent to our presence," Earle wrote in the fall 2012 issue of the Virginia Quarterly Review.

"I marveled at the perils she had survived during six decades, including the first ten or so years before she found a lifetime mate. She learned to fly and navigate over thousands of miles to secure enough small fish and squid to sustain herself, and every other year or so, find her way back to the tiny island and small patch of grass where a voraciously hungry chick waited for special delivery meals."

Indeed, Wisdom has logged an estimated two to three million miles since 1956—or four to six trips from Earth to the moon and back, according to the USGS. (Related: "Albatross's Effortless Flight Decoded—May Influence Future Planes.")

Bruce Peterjohn, chief of the North American Bird Banding Program, called Wisdom's story "simply incredible."

"If she were human, she would be eligible for Medicare in a couple years—yet she is still regularly raising young and annually circumnavigating the Pacific Ocean," he said in a statement.

Bird's-Eye View

As for Robbins, he said he'd "love to get out to Midway again." But in the meantime, he's busy going through thousands of bird records in an effort to trace their life histories.

There's much more to learn: For instance, no one has ever succeeded in putting a radio transmitter on an albatross to follow it throughout its entire life-span, Robbins noted.

"It would be [an] exciting project for someone to undertake, but I'm 94 years old," he said, chuckling. "It wouldn't do much for me to start a project at my age."

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Arias Challenged On Pedophilia Claim

Accused murderer Jodi Arias was challenged today by phone records, text message records, and her own diary entries that appeared to contradict her claim that she caught her ex-boyfriend, Travis Alexander, looking at pictures of naked boys.

Arias had said during her testimony that one afternoon in January 2008, she walked in on Alexander masturbating to pictures of naked boys. She said she fled from the home, threw up, drove around aimlessly, and ignored numerous phone calls from Alexander because she was so upset at what she had seen.

The claim was central to the defense's accusation that Alexander was a "sexual deviant" who grew angry and abusive toward Arias in the months after the incident, culminating in a violent confrontation in June that left Alexander dead.

Arias claimed she killed him in self-defense. She could face the death penalty if convicted of murder.

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

Today, prosecutor Juan Martinez, who has been aggressive in questioning witnesses throughout the trial, volleyed questions at her about the claim of pedophilia, asking her to explain why her and Alexander's cell phone records showed five calls back and forth between the pair throughout the day she allegedly fled in horror. Some of the calls were often initiated Arias, according to phone records.

Jodi Arias Doesn't Remember Stabbing Ex-Boyfriend Watch Video

Jodi Arias Murder Trial: Testimony About Ex's Death Watch Video

Arias on Ex-Boyfriend's Death: 'I Don't Remember' Watch Video

She and Alexander also exchanged text messages throughout the afternoon and evening at a time when Arias claims the pedophilia incident occurred. In those messages they discuss logistics of exchanging one another's cars that night. Alexander sends her text messages about the car from a church social event he attended that night that she never mentioned during her testimony.

Arias stuck by her claim that she saw Alexander masturbating to the pictures, and her voice remained steady under increasingly-loud questioning by Martinez.

But Martinez also sparred with Arias on the stand over minor issues, such as when he asked Arias detailed questions about the timing and order of events from that day and Arias said she could not remember them.

"It seems you have problems with your memory. Is this a longstanding thing? Since you started testifying?" Martinez asked.

"No it goes back farther than that. I don't know even know if I'd call it a problem," Arias said.

"How far back does it go? You don't want to call them problems, are they issues? Can we call them issues? When did you start having them?" he asked in rapid succession. "You say you have memory problems, that it depends on the circumstance. Give me the factors that influence that."

"Usually when men like you or Travis are screaming at me," Arias shot back from the stand. "It affects my brain, it makes my brain scramble."

"You're saying it's Mr. Martinez's fault?" Martinez asked, referring to himself in the third person.

"Objection your honor," Arias' attorney finally shouted. "This is a stunt!"

Timeline of the Jodi Arias Trial

Martinez dwelled at one point about a journal entry where Arias wrote that she missed the Mormon baptism of her friend Lonnie because she was having kinky sex with Alexander. He drew attention to prior testimony that she and Alexander used Tootsie Pops and Pop Rocks candy as sexual props.

"You're trying to get across (in the diary entry) that this involved a sexual liaison with Mr. Alexander right?" he asked. "And you're talking about Tootsie Pops and Pop Rocks?"

"That happened also that night," Arias said.

"You were there, enjoying it, the Tootsie Pops and Pop Rocks?" he asked again, prompting a smirk from Arias.

"I enjoyed his attention," Arias said.

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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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