Today on New Scientist: 30 January 2013

Timbuktu's precious scientific texts must be saved

Islamist militants in Mali have burned documents that attest to science in Africa before European colonisation - what remains must be protected

Think that massage feels good? Try adding drugs

Nerve bundles that respond to stroking have been identified and chemically activated in mice

How Obama will deliver his climate promise

The US is set to meet - and maybe exceed - Obama's pledge to cut US emissions by 17 per cent, which could give a boost to international climate talks

Minimum booze price will rein in alcohol abuse

Evidence suggests the UK government's proposal to set a minimum price for alcohol could save thousands of lives, and billions of pounds of public money

First real time-travel movies are loopers

Hollywood has played with time travel for decades, but now physicists have the first movies of what travelling to the past actually looks like

Surfer rides highest wave ever caught

Garret McNamara of Hawaii claims to have ridden the highest wave ever caught by a surfer, a 30-metre monster off the coast of Nazaré, Portugal

Infrared laptop trackpad ignores accidental touches

Longpad is a touchpad that extends the full width of your laptop and uses infrared sensors to ignore any unwanted touches

Close call coming: Averting the asteroid threat

With an errant space rock heading this way, just how good are our asteroid defences - and how do we avert the cataclysm?

The right to fight: women at war

The US military has accepted women into combat. What can science tell us about how women deal with being in the line of fire? And are they any different to men?

Earth and others lose status as Goldilocks worlds

Several planets are taking a hit thanks to a redefinition of the habitable zone - the area around a star in which liquid water can theoretically exist

The 10,000-year bender: Why humans love a tipple

Our taste for alcohol results from an evolutionary tussle between humans and yeast - one in which the microbes have often had the upper hand

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Europe will get its money back, says Bank of Greece

BERLIN: Greece will pay back the billions of euros of European aid it has received to fight its debt crisis, the head of the country's central bank told Germany's Sueddeutsche Zeitung.

"I understand the concern of European taxpayers," Governor of the Bank of Greece George Provopoulos, said in Thursday's edition of the daily newspaper.

"But I can tell you one thing: this time, the government will get results. The country is transforming itself. The Europeans will get their money back."

"The Greeks, including the politicians, have understood one thing: this time around it's the last chance for Greece," he added.

Provopoulos acknowledged that the application of structural reforms required by the country's international creditors had in the past not been adequate.

"That was a big mistake," he said.

He also conceded that if "tax evasion is a problem in every country, it is particularly prevalent in Greece".

But he insisted that confidence was returning to the country, for while 87 billion euros ($118b) had been withdrawn from Greek bank accounts since 2010, 15 billion euros had been put back in over the past seven months.

The EU and IMF have committed a total of 240 billion euros ($320b) in rescue loans to Greece since 2010. In return they insisted on a tough austerity programme to get the country's finance in order.

So far, however, Greece has failed to deliver, particularly when it has come to cutting the public deficit.

The coalition government led by Prime Minister Antonis Samaras announced last week that Greece had narrowed its public deficit to 8.1 per cent in 2012, marking a rare improvement over targets pledged to its EU-IMF creditors.

The hardship caused by the swingeing public sector cuts has caused a wave of sometimes violent protests and strikes.

The harsh economic climate has also seen the rise of the far-right in the country with the neo-Nazi Golden Dawn winning 18 seats in the 300-seat parliament in last year's elections.

International human rights groups have warned of a surge in xenophobic attacks on migrants in Greece.

- AFP/ck

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Teen who performed at inaugural events shot dead

By Catherine E. Shoichet and Ted Rowlands, CNN

updated 9:33 PM EST, Wed January 30, 2013

STORY HIGHLIGHTS

• NEW: Chicago mayor: "We have a responsibility to see a stop to this"


• Hadiya Pendleton, 15, was shot dead in Chicago on Tuesday


• Last week she performed in events surrounding President Obama's inauguration


• "Just a matter of days after the happiest day of her life, she's gone," Sen. Dick Durbin says

Chicago (CNN) -- A teen who performed at events around President Barack Obama's inauguration was shot to death in Chicago this week, and now her story has become part of the debate in Washington over gun violence nationwide.

The shooting death of 15-year-old Hadiya Pendleton came up in a U.S. Senate hearing and a White House press briefing Wednesday.

"She was an honor student and a majorette," said Sen. Dick Durbin, D-Illinois. Performing at inaugural events last week "was the highlight of her young, 15-year-old life," he said.

Speaking at Wednesday's Senate Judiciary Committee hearing on gun violence, Durbin mentioned Pendleton's death as he argued that more must be done to stop gun crimes.

Giffords: 'Too many children dying'

"Yesterday, in a rainstorm after school, she raced to a shelter. A gunman came in and shot her dead," he said. "Just a matter of days after the happiest day of her life, she's gone."

The park shelter where she was shot is just a mile from Obama's home in Chicago.

White House spokesman Jay Carney described her death as a "terrible tragedy."

"The president has more than once, when he talks about gun violence in America, referred not just to the horror of Newtown or Aurora or Virginia Tech or Oak Creek but to shootings on the corner in Chicago or other parts of the country," Carney told reporters. "And this is just another example of the problem we need to deal with."

2013 has gotten off to a deadly start in Chicago -- Pendleton was the year's 42nd murder victim. No arrests have been made in the case, police said Wednesday.

In 2012, 506 people were slain in the city.

Chicago Mayor Rahm Emanuel described Pendleton Wednesday as "what's best in our city, a child going to school who takes a final exam, who had just been to the inaugural."

"We have a responsibility to see a stop to this," he said. "And all of us are responsible."

Pendleton was shot just blocks away from her high school on the south side of Chicago, CNN affiliate WGN reported.

LaPierre, the NRA's heavyweight

Police told CNN affiliates that the teenager had no gang affiliation and likely was not the intended target.

"There has to be an end to it. It's just too much. The children cannot go to school. They're in fear," Bonita O'Bannion, who lives in the area where the shooting occurred, told CNN affiliate WBBM.

Carney said the president and first lady's thoughts and prayers are with Pendleton's family.

"And as the president said, we will never be able to eradicate every act of evil in this country," Carney said, "but if we can save even one child's life, we have an obligation to try when it comes to the scourge of gun violence."

How the violent mentally ill can buy guns

CNN's Ted Rowlands reported from Chicago. CNN's Catherine E. Shoichet wrote the story in Atlanta. CNN's Tom Cohen contributed to this report from Washington.

Part of complete coverage on

updated 2:46 PM EST, Wed January 30, 2013

The federal background check system for gun buyers didn't stop a mentally ill man from buying a gun, which he used to kill his mother.

updated 9:15 PM EST, Wed January 30, 2013

Rather than focusing on gun restrictions, the NRA is promoting a focus on fixing the nation's mental health system.

updated 1:28 PM EST, Wed January 30, 2013

Wayne LaPierre is not a large man. Yet, in Washington, he can make even brave politicians toss in the towel at the first sign of a scuffle.

updated 12:17 PM EST, Tue January 29, 2013

More than 6,000 people are killed each year by handguns. That's like having a massacre on the scale of Newtown 239 times during one year.

updated 3:18 PM EST, Sat January 26, 2013

On one side were pegboard panels mounted with various assault rifles and semi-automatic weapons -- including a Bushmaster similar to the one used in last month's Newtown school massacre.

updated 2:48 PM EST, Mon January 28, 2013

The National Rifle Association chief issued a blistering retort to President Barack Obama's inaugural address, accusing him of name calling and limiting American freedoms.

updated 2:50 PM EST, Mon January 28, 2013

President Barack Obama proposed a package of measures intended to reduce gun violence in the wake of the Newtown school massacre last month. But would they work?

updated 3:41 PM EST, Sat January 26, 2013

Proponents of gun control hold a March in Washington, while small number opponents gather to express their views.

updated 7:11 AM EST, Wed January 16, 2013

A month after the deadly school shootings in Newtown, Connecticut, the National Rifle Association is taking heat for releasing a mobile video game that lets players learn how to shoot at targets.

updated 7:49 AM EST, Mon January 28, 2013

Gens. Michael Hayden (Ret.) and Stanley McChrystal (Ret.) weigh in on America's gun debate.

updated 3:00 PM EST, Mon January 28, 2013

The "universal background checks" now being pushed by some gun control supporters is code for closing loopholes on such checks at gun shows and other private sales.

updated 3:01 PM EST, Mon January 28, 2013

Two couples rooted in the American mainstream. Two spouses who were nearly killed by mentally ill gunmen.

updated 3:02 PM EST, Mon January 28, 2013

Mass shootings in 2012 reignited the debate over legislation to combat gun violence. Here's a look at laws already on the books in the United States dealing with firearms.

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Obama: "No doubt" Congress will pass immigration, gun bills

Play Video

Obama: "No doubt" gun, immigration bills will pass in coming months

There's more bipartisan support in Congress for comprehensive immigration reform than gun control legislation, President Obama said tonight during an interview with Univision, but qualified that even under his proposal, illegal immigrants shouldn't be harboring expectations that they'll be granted citizenship "manana."

"Even under our proposal, this is not a situation where overnight, suddenly people all find themselves as citizens," Mr. Obama told the Spanish-language television network. "They're going to have to go to the back of the line. We're going to have to clear out the existing line, backlogs we have in terms of illegal immigrants, because they did it the right way. We shouldn't punish them for breaking the law.

"...What we don't want to do is to create some vague prospect in the future that somehow comprehensive immigration reform that includes a pathway to citizenship will happen manana," he continued, chuckling softly at the somewhat awkward injection of the Spanish word for "tomorrow." "But we have to put that in place at the outset, and make sure people are clear that this pathway is real and not just a fantasy for the future."

Asked whether he was in a standoff with Sen. Marco Rubio, R-Fla., the son of Cuban immigrants who has said he will not support a bill that does not put border control ahead of a path to citizenship, Mr. Obama said no, but pointed out that the number of people crossing the border illegally has dropped "about 80 percent since 2000."

On Tuesday, the president delivered a speech in Las Vegas outlining his immigration plan and applauding a bipartisan group of eight senators that has offered up proposals as well. In an interview today with another Spanish language network, Telemundo, he specified that he's hoping immigration reform that includes a pathway to citizenship can be passed in the next six months, but "certainly this year."

Meanwhile, despite facing more resistance from the right on tightening gun laws, he said he has "no doubt" that Congress will be able to put through legislation on gun control, as well as immigration.

Play Video

Obama: Legalization for illegal immigrants won't happen "ma?ana"

"On the gun issue, you're starting to see gun owners, people who traditionally have opposed gun control, saying, 'You know what, when 20 of our children are shot by somebody who is disturbed, and when it is that easy to get these high-clip magazines that can fire off hundreds of shots in a few minutes, then it's time for us to do better job on background checks, to get control of these magazine clips, to really crack down on gun trafficking," Mr. Obama said in the Univision interview.

The Senate Judiciary Committee today held the first congressional hearing on gun violence since last month's massacre at a Newtown, Conn., elementary school, that left 20 children and six adults dead. Star witnesses included former Rep. Gabrielle Giffords, D-Ariz., who survived a shot to the head two years ago during an assassination attempt that left six people dead, and her husband on one side, and NRA CEO Wayne LaPierre on the other.

Both gun control and immigration "will end up generating some opposition," the president said. "There will be passions on both sides. But I'm generally encouraged that the Senate seems to be having a serious conversation about these issues."

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Arias Trial Shocked by Slashed Throat Photo

The courtroom at the Jodi Arias murder trial was shocked -- and Arias began sobbing -- when the prosecutor stunned them by suddenly flashing a photograph of Arias' ex-boyfriend Travis Alexander with his throat slashed open.

Alexander's sisters and friends burst into tears and one ran out of the courtroom when prosecutor Juan Martinez held up the grisly picture of Alexander with his throat slashed and bloodied.

Arias, who is on trial for allegedly murdering Alexander, sobbed uncontrollably at the sight of the photo. She is accused of stabbing Alexander 27 times, slashing his throat, and shooting him twice in the head in a bout of jealousy. She could face the death penalty if convicted.

In the moments before the incident, Martinez was questioning Lisa Daidone, who dated Alexander in 2007 after Alexander's break up with Arias but while he and Arias continued to sleep together. The defense had gone painstakingly through an angry email Daidone had sent Alexander to break up with him, after she found out he was cheating on her with Arias.

"Do you think that even with everything they claimed he put you through, do you think it is appropriate to take a knife and slash somebody's throat?" Martinez yelled.

"Is this what a normal relationship looks like to you?" Martinez shouted as he held up the picture amid shouts of "objection" from the defense and gasps from onlookers.

Judge Sherry Stephens called for a recess, and when the court returned the judge warned the audience to keep their reactions to testimony silent.

Jodi Arias Murder Trial: Defense's First Day of Witnesses Watch Video

Jodi Arias Murder Trial: Defense Begins Case Watch Video

Jodi Arias Murder Trial: Reported Plea Deal Attempt Watch Video

The outburst came at the end of an intense line of questioning from Martinez as he asked Daidone to explain that Alexander treated her well during their relationship, attempting to disprove the defense's accusations that Alexander was a sex-obsessed, aggressive cheater.

Daidone had testified under questioning by Arias' lawyers that she broke off her relationship with Alexander several times partly out of her suspicions that he was cheating on her, although he had asked her to marry him.

As Mormons they refrained from sex before marriage and she was surprised to find out after Alexander's death that he was not a virgin. Another witness, Desiree Freeman, told the court that Alexander claimed to be a virgin. "He made jokes about it" and seemed proud of the fact, Freeman testified.

The defense cited Daidone's breakup email listing her complaints about Alexander in their effort to portray Alexander as an aggressive philanderer.

"Did you tell him that you felt he wanted you just for your body, that kissing didn't mean anything to him and was just a way for him to let out sexual tension? And that it made you feel used and dirty?" defense attorney Jennifer Willmott asked Daidone.

Daidone said yes, and that she "had felt that way then."

But the prosecutor grilled Daidone about that email, drawing a picture of a more reserved and sexually restrained Alexander.

"You were asked about that email," Martinez said, "and one of the things you talked about, isn't it true that Mr. Alexander wouldn't kiss you at the start of the relationship? You were the person who initiated contact? He was the person holding it up, right? He was holding up your religious beliefs?" Martinez asked.

Daidone agreed.

"He was doing everything he could to conform to what you wanted, wasn't he? Not other way around," Martinez said.

Daidone said that when she sent the angry email to Alexander, criticizing him for thinking about sex and talking about sex, that she was "inexperienced" and "immature," and she later came to regret saying those things to him.

Daidone said that Alexander always kept in close contact with Arias, texting and calling her often. She was suspicious that he was cheating on her, but did not know they were involved sexually.

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Today on New Scientist: 29 January 2013

Creatures of the air caught in the mist

Photographer Todd Forsgren uses mist nets to briefly ensnare a variety of tropical South American birds before releasing them, unharmed

Drug reduces enlarged prostate with few side effects

Shrinking enlarged prostates by blocking a potent growth factor could avoid problems - such as erectile dysfunction - that accompany current treatments

Climate change blamed for Australia's extreme weather

Floods have hit the east coast of Australia before recent bush fires have been put out, giving people a taste of climate change's possible consequences

Midnight sun: How to get 24-hour solar power

Rust may be the scourge of electronics but it could help solar power run all night

The most beautiful explanations

The 2012 Edge questions asked for great thinkers' favourite explanations. This Explains Everything collects them all into a fascinating read

Netted Costa Rican birds pay small price for art

Only mildly traumatic, mist nets offer an easy and safe way to catch birds for artistic, and ecological, study

Iran launches monkey into space

The Iranian Space Agency claims to have launched a rhesus monkey into space on a sub-orbital flight, and returned it safely to Earth

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21,227 cartons of contraband cigarettes seized

SINGAPORE: Customs officers seized 21,227 cartons of contraband cigarettes and arrested five men and a woman during islandwide operations last week.

Singapore Customs said on Wednesday that the total value of the cigarettes seized was over S$2 million, while the total duty and goods and services tax (GST) evaded was S$1.8 million.

Three distribution networks were disrupted.

The biggest seizure was from a prime-mover, which had a consignment of goods declared as pottery.

The vehicle, which was moving out of Jurong Port on 23 January, had 18,000 cartons of duty-unpaid cigarettes hidden in wooden crates.

Three men were arrested in connection with this seizure.

Investigations are ongoing.

- CNA/ck

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Tearful Newtown dad: No new gun laws

By David Ariosto, CNN

updated 8:09 PM EST, Tue January 29, 2013

STORY HIGHLIGHTS

• Mark Mattioli, a parent of a Sandy Hook victim, says there are more than enough gun laws


• "The time is now" to strengthen gun laws, says Veronique Pozner, another parent


• Crowd interrupts the statement of a parent of a slain child


• Connecticut has some of the nation's strictest gun laws

(CNN) -- His voice wavering, Mark Mattioli wiped away tears as he recalled the day his 6-year-old son died when a man wielding an AR-15 semi-automatic rifle broke into Sandy Hook Elementary School and began shooting.

His son, James, was among the 20 children and seven adults killed by Adam Lanza on December 14 in Newtown, Connecticut -- an event so horrific that it has since spawned a federal task force and kick-started a national conversation about gun control.

But unlike the handful of other parents who testified Monday at the emotionally charged hearing in Hartford, Connecticut, Mattioli said there are more than enough gun laws on the books. He called instead for a closer look at mental health policies.

Why new laws could miss America's bigger gun problem

"I don't care if you named it 'James' law,' I don't want (another law)," he said during the first of a series of meetings set up by a legislative task force assigned to review the state's gun laws.

Reaction to Newtown school killings

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"I think there's much more promise for a solution in identifying, researching and creating solutions along the lines of mental health."

Connecticut's medical examiner said he was told that Lanza, 20, had Asperger's syndrome. Research has not shown a link between that condition and violence.

The hearing drew hundreds to the Connecticut state house and revealed the sharp divide in public opinion over what should happen next in the massacre's aftermath.

"The time is now," said Veronique Pozner, whose son, Noah, was also killed, referring to a strengthening of the nation's gun laws.

Sandy Hook probe to extend until summer

With a framed photo of her slain 6-year-old propped up beside her, Pozner called on Connecticut to become "an agent for change" across the country.

During her testimony, she held up a crayon drawing that Noah once scrawled on Thanksgiving.

"I am thankful for the life I live," he wrote.

At one point during the hearing, Neil Heslin, father of a 6-year-old boy named Jesse who was also gunned down that day, asked why the public needed assault weapons and high-capacity magazines.

Some people in the crowd then interrupted his statement and shouted the "Second Amendment shall not be infringed."

"We're not living in the Wild West. We're not a Third World nation," Heslin continued. "We have the strongest military in the world. We don't need to defend our homes with weapons like that."

Connecticut already has some of the nation's strictest gun laws.

Gov. Dannel Malloy, a first-term Democrat, has also vowed to address the factors that led to last month's massacre and set up a 16-member panel of experts to come up with recommendations. It includes experts who reviewed policies after mass shootings in Colorado and at Virginia Tech.

The panel must meet a March 15 deadline for its initial report, which Malloy is expected to use in drafting initiatives aimed at reducing gun violence.

Newtown parents learn comforting details about son's death

Part of complete coverage on

Details continue to emerge about what precisely happened at Sandy Hook Elementary School. Here is a timeline of events that compiles the latest reporting.

An interactive tribute to the victims of the Sandy Hook Elementary School shooting.

updated 11:26 AM EST, Tue January 15, 2013

His parents remember Dylan Hockley as such a happy child.

updated 10:08 PM EST, Mon January 14, 2013

Many questions remain after a school massacre shocked the nation. But what's clear is that the pain remains powerfully visible throughout the community.

updated 12:17 PM EST, Fri December 21, 2012

Growing up in Louisiana and Texas in the home of a part-time deputy sheriff, guns were a constant presence in Robin's childhood.

updated 10:17 AM EST, Wed December 19, 2012

Amid the chaos that first-responder Ray Corbo witnessed on Friday, there is one image that he will never forget.

updated 10:02 AM EST, Thu December 20, 2012

In many ways, Josh Stepakoff's childhood came to an abrupt halt at 10:49 a.m. on August 10, 1999.

updated 9:40 AM EST, Thu December 20, 2012

When Lauren Rousseau's boyfriend wakes up, he can smell her perfume.

updated 10:30 AM EST, Tue December 18, 2012

Placing yourself in the path of flying bullets to protect innocents. It's a job description fitting for a soldier or police officer, but not for a school teacher.

updated 5:45 AM EST, Mon December 17, 2012

Robbie Parker has a message for the family of the gunman who killed his 6-year-old daughter and 19 of her school mates.

updated 11:46 AM EST, Fri December 21, 2012

Learn how to help the victims and families affected by the Connecticut school shooting tragedy.

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Calif. family with "mixed" immigration status eager for Obama reforms

(CBS News) LOS ANGELES - On Tuesday, President Obama laid out what would be the most sweeping reform of immigration law in decades. it would include a pathway to citizenship for the 11 million illegal immigrants who already live in America. Here's how he described his plan in Las Vegas:

President Barack Obama delivers remarks on immigration reform at Del Sol High School in Las Vegas, January 29, 2013. Obama Tuesday hailed a "genuine desire" among warring politicians to pursue immigration reform, ahead of a speech laying out his own approach to the politically fiery issue.

/

JIM WATSON / AFP / Getty Images

"We've got to lay out a path -- a process that includes passing a background check, paying taxes, paying a penalty, learning English, and then going to the back of the line behind all the folks who are trying to come here legally, that's only fair. So that means it won't be a quick process, but it will be a fair process. And it will lift these individuals out of the shadows and give them a chance to earn their way to a green card and eventually to citizenship."

President Obama also called for stronger enforcement on the borders. His plan is similar to a bill that both Democrats and Republicans are introducing in the Senate. This may be the best chance for immigration reform in decades. It would mean a lot of families would not live in fear of being split up.

Jaime Colin helps his mother Lupe at one of the family's two dry cleaners in Southern California.

Obama: "Now is the time" for immigration reform
McCain: "We cannot have 11M people living in the shadows"
Immigration proposal a "major breakthrough," senators say
Is now the time for immigration reform?

"My parents have worked so hard," he said. "Everything I am, everything my sister is -- we owe to them."

The Colin family's immigration status is complicated. Jaime and his sister Diana were brought from Mexico as children. President Obama's deferred action program allows them to stay for work and school. Their younger siblings were born in the U.S. But their parents have been here illegally for 22 years.

Their father declined to appear on camera. Lupe Colin said they employ five workers and have earned a path to citizenship. "I have my own business," she said. "I am living here like an American citizen because I pay the taxes."

Added Diana Colin: "We're aspiring citizens. Obama promised us immigration reform."

What would these changes in immigration policy mean for the Colin family? "We would be more secure, we don't have to live with the fear of being deported, having our family torn apart," Jaime Colin said.

"That's the calculation that they made when they came into the country illegally," said Jack Martin of the Federation for American Immigration Reform (FAIR), a group that lobbies for strict immigration enforcement. "They've been in the country breaking the law all that period of time. And that should earn them no priority with regard to people who have been waiting outside the country

He said allowing the Colins to stay in the U.S. is no more effective at stopping illegal immigration than a 1986 law that allowed three million illegal immigrants to apply for legal immigrant status.

"We now have 11 or 12 million illegal aliens in the country," said Martin. "Instead of cutting down on illegal immigration, it led to an increase."

As for those say her family should get to the back of the line, Diana Colin responded: "We have been here as aspiring citizens for 22 years. Is that the back of the line? What is the back of the line?"

The Colin family believes the political muscle Hispanic showed at the polls in November will push Democrats and Republicans to actually pass immigration reform with a path to citizenship this year.

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Jodi Arias Borrowed Gas Cans Before Killing Ex

Accused murderer Jodi Arias borrowed two five-gallon gas cans from a former boyfriend the day before she drove to Arizona to kill another ex, Travis Alexander, according to testimony in Arias' murder trial today.

In cross examination, prosecutors also forced Arias' former live-in boyfriend Darryl Brewer to describe his sex life with Arias as "pretty aggressive."

Brewer, 52, dated Arias for four years and shared a home with her in California for two years. He told the court today that Arias called him in May 2008, asking to borrow gas cans, but would not explain why. She called him again at least two more times, and arrived at his house on June 2008, to borrow the cans.

On the day she picked up the gas cans she told Brewer that she was going to visit friends in California and Arizona.

Prosecutors argue that Arias then drove to Mesa, Ariz., where she allegedly had sex with Alexander, took nude photos of him, and then stabbed him 27 times, slashed his throat, and shot him twice in the head. She is charged with murder and could face the death penalty if convicted.

Arias, who claims she killed Alexander in self defense, had approached prosecutors two years ago offering to plea to a second degree murder charge, which could carry a 25 year term, but the state rejected the offer, Nancy Grace reported on Good Morning America today.

Brewer said that Arias never returned the gas cans. The pair had been broken up two years earlier and they had only spoken "sporadically," he said.

Jodi Arias Murder Trial: Reported Plea Deal Attempt Watch Video

Jodi Arias Murder Trial: Rental Car Covered in 'Kool-Aid Stains' Watch Video

Jodi Arias Trial: Explosive Recordings Played in Court Watch Video

Prosecutors also showed receipts from Arias' trip from her California home to Alexander's home in Mesa, showing that she purchased a 10 gallons of gas at one gas station the night before she drove to Arizona, and then another 10 gallons from a different gas station 10 minutes later. Prosecutors are expected to argue she brought the gas with her to fill up her car secretly on the way to Alexander's home, showing premeditation for the murder.

Arias' attorneys called Brewer as one of their first witnesses as they began mounting their case that Arias killed Alexander in self defense, arguing that Alexander was controlling and abusive toward Arias.

They asked Brewer to explain how he and Arias had been in a stable relationship for four years, from 2002 to 2006, and had bought a home together before Arias met Alexander at a business conference and began to change.

"I saw a lot of changes in Jodi. She became a different person than I had known previously," Brewer said, describing how Arias' behavior changed in May 2006 when she joined a company called Pre-Paid Legal. There, she met Alexander and began seeing him. She continued to live with Brewer.

"She had continued to pay the mortgage, but she was not paying other household bills, she began getting into debt or financial trouble," Brewer said. "For me it seemed she was not as rational or logical."

Arias also converted to Mormonism while living with Brewer, telling him that he could no longer curse and she would no longer have sex with him because she was saving herself for marriage.

The pair had previously had an "enthusiastic" and "aggressive" sex life, Brewer admitted to prosecutors. They had engaged in anal sex, Arias had taken nude photos of Brewer, and Arias had purchased breast implants in 2006, he testified.

Brewer said that after Arias began to change, he made arrangements to move closer to his son from his first marriage, and he and Arias broke up.

They kept in touch with occasional phone calls until Arias asked to borrow the gas cans in June 2008, and then called him a week after borrowing the cans to say that her friend had been killed.

Martinez, reading notes from an interview Brewer gave to authorities during the investigation into Alexander's death, asked if Arias had ever mentioned needing an "alibi." Brewer said he did not recall any conversation about alibis.

"After this date of June 4, 2008," Martinez asked, "you received a call from Jodi Arias, and she was very agitated?"

"She was sad," Brewer said.

"Did she tell you that her friend had been killed and she did not have an alibi?"

"I don't remember that," Brewer said.

Arias was arrested a month after Alexander was found dead, in July 2008.

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