Today on New Scientist: 5 February 2013

Engineering light: Pull an image from nowhere

A new generation of lenses could bring us better lighting, anti-forgery technology and novel movie projectors

Baby boomers' health worse than their parents

Americans who were born in the wake of the second world war have poorer health than the previous generation at the same age

New 17-million-digit monster is largest known prime

A distributed computing project called GIMPS has found a record-breaking prime number, the first for four years

Cellular signals used to make national rainfall map

The slight weakening of microwave signals caused by reflections off raindrops can be exploited to keep tabs on precipitation

NASA spy telescopes won't be looking at Earth

A Mars orbiter and an exoplanet photographer are among proposals being presented today for how to use two second-hand spy satellites that NASA's been given

China gets the blame for media hacking spree

The big US newspapers and Twitter all revealed last week that they were hacked - and many were quick to blame China. But where's the proof?

Nobel-winning US energy secretary steps down

Steven Chu laid the groundwork for government-backed renewable energy projects - his successor must make a better case for them

Sleep and dreaming: Where do our minds go at night?

We are beginning to understand how our brains shape our dreams, and why they contain such an eerie mixture of the familiar and the bizarre

Beating heart of a quantum time machine exposed

This super-accurate timekeeper is an optical atomic clock and its tick is governed by a single ion of the element strontium

A life spent fighting fair about the roots of violence

Despite the fierce conflicts experienced living among anthropologists, science steals the show in Napoleon Chagnon's autobiography Noble Savages

Challenge unscientific thinking, whatever its source

Science may lean to the left, but that's no reason to give progressives who reject it a "free pass"

Need an organ? Just print some stem cells in 3D

Printing blobs of human embryonic stem cells could allow us to grow organs without scaffolds

Ice-age art hints at birth of modern mind

An exhibition of ice-age art at London's British Museum shows astonishing and enigmatic creativity

Read More..

Bill introduced to protect private home buyers

SINGAPORE: Amendments to the Housing Developers (Control & Licensing) Bill was introduced in Parliament on Wednesday to protect the interests of home buyers of uncompleted private residential properties.

Last year, the Housing Developers Rules were amended to better protect home buyers.

Developers now have to provide scaled location plans, unit floor plans and detailed breakdowns of a unit's floor area to home buyers to enable them to make better-informed decisions.

Key amendments to the Act have been made in the areas which include more comprehensive and timely information to the public, enhancing governance of developers and increasing the penalties for offences.

- CNA/fa

Read More..

911 call: 'He says he killed two guys'

STORY HIGHLIGHTS

• NEW: Bodies were found "lying on the ground, covered in blood"


• The ex-Marine faces murder charges in deaths of veterans Chris Kyle and Chad Littlefield


• Routh's family called cops in 2012; he was mad because his father planned to sell his gun


• "He told me that he's committed a murder," sister of suspect tells 911 operator

(CNN) -- The 911 caller, her voice quavering, says she's terrified because of what her brother had just told her.

"He says that he killed two guys. They went out to a shooting range. Like, he's all crazy ..."

Those recorded words from the sister of Eddie Ray Routh gave Texas authorities one of their first indications Saturday of death at an isolated shooting range.

Routh, who was arrested hours after the call, is facing murder charges in the deaths of a military sniper and another military veteran.

Officials say Routh killed his fellow veterans on a gun range in a remote section of Rough Creek Lodge and Resort, which sprawls across 11,000 acres in Glen Rose, Texas, 90 minutes southwest of Dallas-Fort Worth.

The Saturday afternoon call from Routh's sister, Laura Blevins, came from her home in Midlothian, some 30 miles southeast of Fort Worth, after Routh, she said, had come to visit her and her husband.

"He's left now, but he told me that he's committed a murder, and I'm terrified for my life because I don't know if he's going to come back here," Blevins says in the call, her words spilling out in a torrent of worry. "I don't know if he's being honest with me."

Asked for detail, she says, "He says that he killed two guys. They went out to a shooting range. Like, he's all crazy. He's f****** psychotic. I'm sorry for my language. I don't know if he's on drugs or not."

In the recording of the call released Tuesday by the Midlothian Police Department, Blevins, saying she is nervous, hands the phone to her husband, Gaines.

"He said he killed two guys at a shooting range," Gaines Blevins says. "He took one of the trucks, like a dark blue or maybe black F-250. He drove off. I'm not sure where he is right now."

The man says that Routh told him he had two guns in the Ford pickup truck. Though the 25-year-old Routh had not threatened the couple, "he was talking kinda babble."

Asked whether Routh had been known to drink or take drugs, Gaines Blevins said, "Yeah, he's been known to drink in the past -- and smoke pot."

The speaker adds that Routh, an ex-Marine, had recently been diagnosed with post-traumatic stress disorder, "and he's been acting a little weird from that," and that he had left Green Oaks psychiatric hospital in Dallas the week before.

The release of the 911 tape came a day after Erath County Sheriff Tommy Bryant said Routh was under 24-hour surveillance on suicide watch in a central Texas jail.

Bryant has said Routh served for four years in the military, though it was unclear how much of that time, if any, was in combat zones.

Shay Isham, a lawyer appointed to represent Routh, has said his client had spent roughly the last two years in and out in Veteran Affairs medical facilities for treatment of mental issues.

Last September 2, Routh was crying, shirtless, shoeless and smelling of alcohol when police caught up with him walking the streets of his hometown of Lancaster, Texas.

His family didn't understand what the Marine veteran was going through, he told the officer, according to a police report.

He was taken then to a hospital for a mental evaluation and placed in protective custody after he had become angry that his father was going to sell his gun. His mother told police he had threatened to "blow his brains out."

This was, Bryant said, after Routh's mother "may have reached out to" one of the victims -- Chris Kyle, author of the best-selling book "American Sniper" -- "to try and help her son."

The suspect is "a troubled veteran whom they were trying to help," said Craft International, a company founded by Kyle, who had tried to help veterans with PTSD since he retired from the Navy in 2009.

Routh, Kyle and his friend, Chad Littlefield, entered the resort and headed toward a gun range at 3:15 p.m. (4:15 p.m. ET) Saturday, according to authorities.

Marcus Luttrell told CNN that Kyle, his friend, had gone to help Routh get "out of the house (and) blow off some steam."

Around 5 p.m. Saturday, a hunting guide alerted authorities Kyle's and Littlefield's bodies had been discovered "lying on the ground, covered in blood," according to an affidavit for the search warrant for Routh's house.

By then, Routh allegedly had taken off in Kyle's black Ford pickup, stopping first at his sister's house about 70 miles away.

Gaines Blevins said his brother-in-law said "he'd traded his soul for a new truck and that he murdered two people," the affidavit says. "He said they were out shooting target practice and he couldn't trust them so he killed them before they could kill him. He said he couldn't trust anyone anymore; everyone was out to get him."

Laura Blevins told her brother that if what he was saying was true, "he needed to turn hisself in," it adds.

But Routh set off again.

At about 8 p.m., police caught up with him near his home in Lancaster, about 15 miles south of Dallas, and took him into custody.

The motive for the killings was unclear

Routh "is the only one that knows," Erath County Sheriff's Capt. Jason Upshaw told reporters on Sunday. "I don't know that we'll ever know."

CNN's Tom Watkins, Ed Lavandera, Josh Levs, Susan Candiotti, AnneClaire Stapleton, Barbara Starr, Emily Smith and Nick Valencia contributed to this report.

Read More..

Sandy storm victims react to proposed home buyout

(CBS News) STATEN ISLAND, N.Y. - One hundred days ago, the Northeast was hit by a left hook from superstorm Sandy.

This week, New York Gov. Andrew Cuomo proposed spending $400 million to buy up and demolish thousands of those homes, so the property can be turned back into wetlands.

Homeowners have mixed feelings about the proposal.

For 11 years, Joe Monte worked two jobs and spent weekends renovating his Staten Island home. Weeks after he finished last fall, superstorm Sandy swept eight feet of water inside.

"I came into the house with paper towels and some Fantastic, and I stood in the middle of the room and called my wife and I told my wife, 'There's nothing to clean here, there's nothing to do. It's done,'" Monte said.

A picture of a house heavily damaged by superstorm Sandy on Staten Island, 100 days after the storm hit.

/

CBS News

Monte welcomes Cuomo's proposal to buy up properties like his in flood-prone areas.

"This isn't my dream, the poison that's in this home, the destruction that took this neighborhood. How could you even stay here?" he said. "How could you even live in this neighborhood?"

100 days post-Sandy, N.Y. Gov. Cuomo wants some areas emptied
Romney camp wrote big check to Red Cross
Watch: Senate passes $50 billion Sandy relief aid bill

But about 30 miles away in Long Beach, N.Y., Fran Adelson plans to stay and rebuild. She, too, lost almost everything in the storm.

"We live here. This is where our homes are, this is where our children were raised, this is where our families are, this is where the businesses that we go to are," she said.

Fran Adelson

/

CBS News

She believes the governor should be looking at ways to help people stay in their communities.

"We would rather see Cuomo spend the money on helping us rebuild than offering to buy people's property," Adelson said.

But Joe Monte says he's had enough. He's walking away.

"I hate that I lost neighbors in my neighborhood," he said. "Three people died in this neighborhood. I hate everything about it. I could never come back here ever again."

Gov. Cuomo's buyout proposal still has to be approved by the federal government. If it is approved, the governor's office says they won't force people to sell their property -- but those who do decide to stay would be offered grants to rebuild their homes.

Read More..

Challenge unscientific thinking, whatever its source

Science may lean to the left, but that’s no reason to give progressives who reject it a “free pass”

IF SCIENCE could vote, who would it vote for? Ask scientists, and a clear answer comes back: science leans to the left.

A 2009 survey conducted by Pew Research in the US found that 52 per cent of scientists identified themselves as liberal, and slightly more believed the scientific community as a whole leaned that way. The corresponding figures for conservatism? Just 9 per cent and 2 per cent respectively.

This association between science and left-leaning politics can only have been reinforced by the disdain with which vocal right-wing politicians, particularly in the US, have treated scientific evidence in recent years. That contrasts with the Obama administration's endorsement of it - although words always come more readily than actions (see "How Obama will deliver his climate promise").

Certainly, some conservatives conspicuously reject those parts of science that clash with their world views - notably evolution, climate change and stem cell research. But this doesn't mean those on the left are automatically and unimpeachably pro-science. In "Lefty nonsense: When progressives wage war on reason", Alex Berezow and Hank Campbell put forward their view that unscientific causes and concerns are just as rife among progressives as conservatives. Conservatives may sometimes be blinkered by their enthusiasm for what they see as moral rectitude, but progressives can be overcome by "back to nature" sentiments on, say, food or the environment.

Berezow and Campbell further claim that progressives who endorse unscientific ideas get a "free pass" from the scientific community. The suspicion must be that this is because scientists themselves lean towards the left, as does the media that covers them. (Both friends and critics of New Scientist tell us we lean in that direction.)

Is there any substance to that suspicion? We should go to every possible length to ensure there isn't. Unreason of any hue is dangerous; any suggestion of bias only makes it harder to overcome. Science and liberalism are natural allies, but only in the literal sense of liberalism as the pursuit of freedom. That means freedom of thought, freedom of speech and, above all, freedom from ideology - wherever on the political spectrum it comes from.

If you would like to reuse any content from New Scientist, either in print or online, please contact the syndication department first for permission. New Scientist does not own rights to photos, but there are a variety of licensing options available for use of articles and graphics we own the copyright to.

All comments should respect the New Scientist House Rules. If you think a particular comment breaks these rules then please use the "Report" link in that comment to report it to us.

If you are having a technical problem posting a comment, please contact technical support.

Read More..

MP proposes amendment to motion on White Paper on Population

SINGAPORE: Member of Parliament (MP) for Holland-Bukit Timah Group Representation Constituency, Liang Eng Hwa, has proposed an amendment to the original motion being debated in Parliament on the White Paper on Population.

He said reflecting the concerns raised by Singaporeans, he proposes to amend the motion to further reinforce the point that Parliament supports maintaining a strong Singaporean core.

This is by encouraging more Singaporeans to get married and have children.

He said: "A key thrust of strengthening our Singaporean core in the workforce is to help enhance the employability of Singaporeans and prepare Singaporeans for the competition. We need to help our citizens better maximise our so-called 'home ground advantage' and benefit from the job opportunities available and get higher salaries.

"What would work against the strengthening of Singaporean core is where foreigners are seen to be taking up jobs that Singaporeans can do. There are clearly still many examples of that in some sectors. We need employers to be more conscious of that."

Mr Liang also wanted to add clarity to the motion by recognizing that the population projection beyond 2020 is for the purpose of land use and infrastructural planning and not a population target.

The MP stressed that Singapore's leaders will not get the buy-in from Singaporeans on the country's long term plans if it has not demonstrated that the government is serious in resolving the current bottlenecks.

He said: "We need to invest big to create space and capacity to cope with higher population and to sustain a high quality living environment. We also need a long term economic strategy that can continue to create good and fulfilling jobs for our citizens.

"Bearing in mind, come 2020, we will have at least 16,000 Singaporeans per year graduating from local universities and many others from the polys and ITEs. We need to keep creating good employment for these graduates every year.

"Economic growth sustains our financial ability to pay for the higher social spending so that our retired citizens can age with dignity and security. Too low an economic growth will change that equation and things may balance out. That is exactly what this population White Paper and Land Use Plan is all about. And I agree with DPM Teo that it is about doing the balancing acts. And that every issue is interlinked with one another and so you can't just take one piece and say we should do more or do less."

Mr Liang said the government also needs to assure Singaporeans that the population policies are meant to benefit citizens.

- CNA/xq

Read More..

Police: Suspect said he had PTSD

STORY HIGHLIGHTS

• NEW: Routh told his sister he'd killed two men, "traded his soul for a truck," an arrest warrant says


• The ex-Marine faces murder charges in deaths of veterans Chris Kyle and Chad Littlefield


• Routh's family called cops in 2012; he was mad because his father planned to sell his gun


• The 25-year-old told police he had PTSD, was hurting and his family didn't understand

Read a version of this story in Arabic.

(CNN) -- Eddie Ray Routh was crying, shirtless, shoeless and smelling of alcohol when police caught up with him walking the streets of his hometown of Lancaster, Texas.

His family didn't understand what he -- a Marine veteran suffering from post-traumatic stress disorder -- was going through, he told the officer last September 2, according to a police report.

He had a simple message that was as much a plea as it was a complaint: I'm hurting.

That visit -- which came after Routh, angry that his father was going to sell his gun, left the house and threatened, his mother told police, to "blow his brains out" -- prompted him to be placed in protective custody and sent to Dallas' Green Oaks Hospital for a mental evaluation.

Six months later, the 25-year-old Routh is in custody once again -- this time in a central Texas jail, facing murder charges in the deaths of America's self-proclaimed most deadly military sniper ever as well as another military veteran.

He is on a suicide watch and under 24-hour camera surveillance, Erath County Sheriff Tommy Bryant said Monday.

And he's already run into further trouble, becoming aggressive with guards in his cell after refusing to give up a spork and dinner tray Sunday night, according to the sheriff.

So who is Eddie Ray Routh?

Bryant has said Routh was in the Marines for four years, though it is unclear how much of that time, if any, was in combat zones. Shay Isham, a lawyer appointed by a judge Monday morning to represent Routh, said his client spent roughly the last two years in and out in Veteran Affairs medical facilities for treatment of mental issues.

His personal history and psychological make-up has come under the spotlight after the bloodshed Saturday.

It was then, officials say, Routh killed his two fellow veterans on a gun range located in a remote part of the Rough Creek Lodge and Resort's vast 11,000 acres.

This was, Bryant said, after Routh's mother "may have reached out to" one of the victims -- Chris Kyle, author of the best-selling book "American Sniper" -- "to try and help her son."

The suspect was "a troubled veteran whom they were trying to help," said Craft International, a company founded by Kyle, who since retiring from the Navy in 2009 had sought to assist ex-troops with PTSD.

Why might Routh have killed these men? He "is the only one that knows," Erath County Sheriff's Capt. Jason Upshaw told reporters on Sunday.

"I don't know that we'll ever know," Upshaw said.

Victims hailed as dedicated, caring patriots

No one else saw the shooting of Kyle and his friend, Chad Littlefield, according to Upshaw.

It occurred sometime after 3:15 p.m. (4:15 p.m. ET) Saturday, when all three men together entered the expansive resort in Glen Rose, some 70 miles southwest of Fort Worth, and headed toward a gun range.

Marcus Luttrell told CNN that Kyle, his friend, had gone to help Routh get "out of the house (and) blow off some steam." Another Kyle friend, former SEAL sniper program instructor Brandon Webb, explained that a range was a "familiar environment" for "military guys."

Around 5 p.m. Saturday, a hunting guide alerted authorities Kyle and Littlefield's bodies had been discovered "lying on the ground, covered in blood," according to Routh's arrest warrant, which was posted on CNN affiliate WFAA's website.

By then, Routh had taken off in Kyle's black Ford pickup, stopping first at his sister's house about 70 miles away in Midlothian. There, he told his sister and brother-in-law what he had done, telling them he had "traded his soul for a truck," the arrest warrant said.

He set off again.

Police finally caught up with Routh near his home in Lancaster, about 15 miles south of Dallas, around 8 p.m. Saturday. Despite a swarm of law enforcement, he managed to speed off in the truck -- but after spiking his tires, authorities were able to detain him without a scuffle by 9 p.m., Bryant said.

The story got intense, widespread attention in large part due to the victims, especially Kyle.

While serving as a sniper in Iraq, the Navy SEAL wrote he personally had 160 confirmed kills from a distance of up to 2,100 feet -- more than any other U.S. serviceman, in any conflict. This helped led Iraqi insurgents to nickname the 6-foot-2, 220-pound Texan "the devil" and put a bounty on his head, he said.

In interviews promoting his book, Kyle offered no regrets,

"I had to do it to protect the Marines," he told Time magazine a year ago. "You want to lose your own guys, or would you rather take one of them out?"

After his retirement from a decade's service in the Navy, Kyle became a businessman, a reality TV personalty, a supporter of fellow vets, an avid hunter and an outspoken opponent of gun control. He leaves behind a wife and two children.

His new ventures included joining other former SEALs in starting Craft International, a security company with the motto "Despite what your momma told you, violence does solve problems."

He also helped established the FITCO Cares foundation, a charity that helps U.S. war vets "who have survived combat but are still fighting to survive post-traumatic stress disorder," the group's website said.

Thousands pledged to toast him and Littlefield on Monday night, and hundreds expressed condolences on Kyle's Facebook fan page.

"Chris, thank you for your service; not only to the country you loved, but also to your fellow warriors that needed a helping hand," one woman wrote. "Rest in peace brave hero, patriot and warrior. You are missed."

The Facebook page also included a tribute to Littlefield, who the page's administrator wrote "felt deeply about the values of family, compassion, friendship and loyalty, and was equally as passionate about his love of God and country."

"Chad, thank you for your love for your country, the dedication to your country and your love for life," a woman said. "God has brought another angel home."

Chris Kyle, America's deadliest sniper

CNN's Ed Lavandera, Josh Levs, Susan Candiotti, AnneClaire Stapleton, Barbara Starr, Emily Smith and Nick Valencia contributed to this report.

Read More..

Ex-Navy SEAL murder suspect had been in mental hospital

FORT WORTH, TexasThe Iraq War veteran charged with killing a former Navy SEAL sniper and his friend on a Texas shooting range had been taken to a mental hospital twice in the past five months and told authorities that he was suffering from post-traumatic stress disorder, police records show.

Eddie Ray Routh, 25, also told his sister and brother-in-law after the shootings that he "traded his soul for a new truck," according to an Erath County arrest warrant affidavit obtained by WFAA-TV. Police said that Routh was driving the truck of victim and ex-Navy SEAL Chris Kyle at the time of arrest.

Play Video

Top SEAL sniper allegedly murdered by fellow vet

Play Video

Ex-Marine suspected of killing ex-Navy SEAL on suicide watch

Routh is charged with one count of capital murder and two counts of murder in the shooting deaths of Kyle, author of the best-selling book "American Sniper," and his friend Chad Littlefield at a shooting range Saturday in Glen Rose. He is on suicide watch in the Erath County Jail, where he's being held on $3 million bond, Sheriff Tommy Bryant said.

Routh, a member of the Marines Corps Reserve, was first taken to a mental hospital on Sept. 2 after he threatened to kill his family and himself, according to police records in Lancaster, where Routh lives. Authorities found Routh walking nearby with no shirt and no shoes, and smelling of alcohol. Routh told authorities he was a Marine veteran who was suffering from post-traumatic stress disorder.

"Eddie stated he was hurting and that his family does not understand what he has been through," the report said.

Routh's mother told police that her son had been drinking and became upset when his father said he was going to sell his gun. She said Routh began arguing with them and said he was going to "blow his brains out."

Police took Routh to Green Oaks Hospital for psychiatric care.

Dallas police records show Routh was taken back to the same mental hospital in mid-January after a woman called police and said she feared for Routh's safety.

Green Oaks will not release patient information, citing privacy laws. Most people brought by police to the hospital are required to stay at least 48 hours.

In May, Routh's mother reported a burglary that included nine pill bottles and her son was involved, according to a Lancaster police report. No other details were available.

Authorities say Routh, Kyle and Littlefield arrived at the sprawling Rough Creek Lodge at about 3:15 p.m. Saturday, and a hunting guide called 911 about two hours later after discovering the bodies. Kyle and Littlefield were shot multiple times, and numerous guns were at the scene, according to the affidavit.

In this April 6, 2012, photo, former Navy SEAL and author of the book American Sniper, Chris Kyle poses in Midlothian, Texas.

/

Paul Moseley

After leaving the Navy, Kyle quickly found a way to maintain contact with his fellow veterans and pass on what had helped him work through his own struggles. By late 2011, he filed the paperwork to establish the nonprofit FITCO Cares, which received its nonprofit status the following spring, said FITCO director Travis Cox.

Routh drove to his sister's house, and told her that he killed two people and that he planned to drive to Oklahoma to evade Texas authorities, the affidavit said. Routh's sister then called police, and he was arrested after a short police pursuit in Lancaster.

Jailers used a stun gun on Routh on Sunday night after he appeared ready to assault them when they entered his cell after he refused to return his food tray, the sheriff said. Then they put Routh in a chair that restrains his arms and legs in his solitary confinement cell, Bryant said.

Bryant said Routh has an attorney but hasn't met with him at the jail in Stephenville, about 75 miles southwest of Fort Worth.

Attempts by The Associated Press to reach Routh's mother and sister were unsuccessful Monday.

Sundae Hughes, an aunt of Routh's, said she watched him grow up but hasn't seen him since his high school graduation in 2006. Hughes was in disbelief that her nephew could be involved in such an incident.

"He has a kind heart (and was) someone willing to jump in and help, no matter what it was," she said.

Routh joined the Marines in 2006 and rose to the rank of corporal in 2010. His military specialty was small-arms technician, commonly known as an armorer. He had been stationed at Camp Lejeune, N.C., and served in Iraq from 2007-08 and in the Haiti disaster relief mission in 2010.

He is now in the individual ready reserve. He could be called to duty, but it's uncommon unless he volunteers, 1st Lt. Dominic Pitrone of the Marine Forces Services public affairs office said.

Travis Cox, director of FITCO Cares — the nonprofit that Kyle set up to give in-home fitness equipment to physically and emotionally wounded veterans — said he believes that Kyle and Littlefield were helping Routh work through PTSD.

Cox didn't know how Routh and Kyle knew each other. He said the shooting range event was not a FITCO session.

Kyle, 38, left the Navy in 2009 after four tours of duty in Iraq, where he earned a reputation as one of the military's most lethal snipers. "American Sniper" was the No. 3 seller of paperbacks and hardcovers on Amazon as of Monday, and the hardcover was out of stock.

Kyle was so deadly accurate in combat that insurgents in Iraq put a $20,000 bounty on his head and dubbed him "The Devil of Ramadi." But to fellow SEALs like Rorke Denver, he was known as "The Legend." Denver told CBS News, "We were aware early on in that deployment that something special, for lack of a better term, was unfolding."

Littlefield, 35, was Kyle's friend, neighbor and "workout buddy," and also volunteered his time to work with veterans, Cox said.

Read More..

Sarai Sierra's 2 Young Boys Don't Know Mom's Dead

The two young sons of slain New York mom Sarai Sierra are under the impression that their father has gone to Turkey to bring their mother home - alive.

Sierra, whose battered body was found near a highway in Istanbul over the weekend, was the mother of two boys aged 9 and 11.

Steven Sierra, who went to Istanbul in search of his wife after she disappeared nearly two weeks ago, told his children that he was going to Turkey to bring their mom home.

"The father will be speaking to them and it's something that's going to be hard and he's going to be talking to them when he comes back," Betsy Jimenez, the mother of Sarai Sierra, said today during a family news conference.

State Representative Michael Grimm said Steven Sierra's biggest concern is telling his children that mom's not coming home.

"It's going to be the hardest thing he's ever going to have to do in his life," said Grimm, who added that the Staten Island family isn't sure when Steven Sierra will be able to bring home his wife's body.

An autopsy was completed Sunday on Sarai Sierra, 33, but results aren't expected for three months. Turkish officials however said she was killed by at least one fatal blow to her head.

A casket holding the Staten Island mother was carried through alleyways lined with spice and food stalls to a church, where the casket remained on Monday.

Turkish police hope DNA samples from 21 people being questioned in the case will be key to finding the perpetrators, the Associated Press reported, according to state run media.

Sarai Sierra's Body Found: Missing New York Mom Found in Turkey Watch Video

Body Found in Search for Missing Mother in Turkey Watch Video

Vanished Abroad: US Woman Missing in Turkey Watch Video

Earlier this week, it was also reported that Turkish police are speaking to a local man who was supposed to meet Sierra the day she disappeared, but he said she never showed.

After an intense search for Sierra that lasted nearly two weeks, her body was found Saturday near the ruins of some ancient city walls and a highway. Sierra was wearing the same outfit she was seen wearing on surveillance footage taken at a food court and on a street the day she vanished, Istanbul Police Chief Huseyin Capkin said.

Sierra's body was taken to a morgue, Capkin said, and was identified by her husband.

It did not appear she had been raped or was involved in any espionage or trafficking, Capkin said.

Betsy Jimenez said Monday that her family has many unanswered questions such as what happened to her daughter after she left her hotel room to go and take photographs of a famous bridge.

"They're still investigating so they might think it might be a robbery, but they're not sure," said Jimenez.

Sierra, who had traveled to Istanbul on Jan. 7 to practice her photography hobby, was last heard from on Jan. 21, the day she was due to board a flight home to New York City.

Dennis Jimenez, Sierra's father, told reporters Monday that he didn't want her to go on the trip.

"I didn't want her to go. But, she wanted to go because this was an opportunity for her to sightsee and pursue her photography hobby because Turkey was a land rich with culture and ancient history and she was fascinated with that," said Jimenez.

While in Istanbul, Sierra would Skype with her family and friends daily, telling them about how amazing the culture was.

Sierra's best friend Maggie Rodriguez told ABC News that she was forced to pull out of the trip at the last minute because she couldn't afford it. That's why Sierra traveled alone.

Her husband, Steven Sierra, and brother, David Jimenez, traveled to Istanbul last Sunday to meet with American and Turkish officials and push the search forward.

Read More..

Bug protects itself by turning its environment to gold

Mythical King Midas was ultimately doomed because everything he touched turned to gold. Now, the reverse has been found in bacteria that owe their survival to a natural Midas touch.

Delftia acidovorans lives in sticky biofilms that form on top of gold deposits, but exposure to dissolved gold ions can kill it. That's because although metallic gold is unreactive, the ions are toxic.

To protect itself, the bacterium has evolved a chemical that detoxifies gold ions by turning them into harmless gold nanoparticles. These accumulate safely outside the bacterial cells.

"This could have potential for gold extraction," says Nathan Magarvey of McMaster University in Hamilton, Ontario, who led the team that uncovered the bugs' protective trick. "You could use the bug, or the molecules they secrete."

He says the discovery could be used to dissolve gold out of water carrying it, or to design sensors that would identify gold-rich streams and rivers.

The protective chemical is a protein dubbed delftibactin A. The bugs secrete it into the surroundings when they sense gold ions, and it chemically changes the ions into particles of gold 25 to 50 nanometres across. The particles accumulate wherever the bugs grow, creating patches of gold.

Deep purple gold

But don't go scanning streams for golden shimmers: the nanoparticle patches do not reflect light in the same way as bigger chunks of the metal – giving them a deep purple colour.

When Magarvey deliberately snipped out the gene that makes delftibactin A, the bacteria died or struggled to survive exposure to gold chloride. Adding the protein to the petri dish rescued them.

The bacterium Magarvey investigated is one of two species that thrive on gold, both identified a decade or so ago by Frank Reith of the University of Adelaide in Australia. In 2009 Reith discovered that the other species, Cupriavidus metallidurans, survives using the slightly riskier strategy of changing gold ions into gold inside its cells.

"If delftibactin is selective for gold, it might be useful for gold recovery or as a biosensor," says Reith. "But how much dissolved gold is out there is difficult to say."

Journal reference: Nature Chemical Biology, DOI: 10.1038/NCHEMBIO.1179

If you would like to reuse any content from New Scientist, either in print or online, please contact the syndication department first for permission. New Scientist does not own rights to photos, but there are a variety of licensing options available for use of articles and graphics we own the copyright to.

All comments should respect the New Scientist House Rules. If you think a particular comment breaks these rules then please use the "Report" link in that comment to report it to us.

If you are having a technical problem posting a comment, please contact technical support.

Read More..