Your molar roots are leftovers from Homo erectus



































TALK about exploring your roots. Longer lifespans mean our adult teeth erupt later than they did in our early ancestors, but the memo didn't make it to the roots of our molars. They develop at the same pace as they did in Homo erectus.












Christopher Dean and Tim Cole at University College London studied the microscopic structure of adult molars to reconstruct the pace of their development, much like tree rings can be used to build a picture of tree growth. They found that the roots of chimpanzee molars go through a growth spurt as the teeth erupt through the gum - probably to provide more stability for biting and chewing. The same thing happened in early hominins, but not in modern humans: by the time our molars arrive, their roots have been fully developed for at least a year.












Dean and Cole found an explanation in Homo erectus, a species who lived between 1.8 million and 300,000 years ago. H. erectus gained its molars at exactly the same age as our molar roots have their growth spurts. Or as Dean puts it: "Our roots are stuck in the past."












In humans, he says, root growth spurts are merely a hangover from an early stage of evolution. We retain molar roots like H. erectus because the growth spurts use too little energy for natural selection to weed them out (PLoS One, doi.org/j8w).

















H. erectus had a bigger brain and smaller teeth than its ancestors. Some believe, controversially, that these features reflected big dietary changes, including eating the first cooked food, which would have been easier to chew while supplying more energy.













The new study may find favour with critics of the controversial "cooked food hypothesis". It shows that H. erectus still required an early molar root growth spurt - presumably to prepare its teeth for heavy-duty chewing.




















































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French-led troops seize airport in Mali Islamist bastion






BAMAKO: French-led forces Saturday wrested control of the airport at the Islamist stronghold of Gao, 1,200 kilometres (750 miles) northeast of the Mali capital Bamako, a security source said.

"Malian and French security forces have secured the airport of Gao and the Wanbary bridge. The two strategic points are under their control," the Malian source said.

The airport is located about six kilometres east of Gao while the bridge lies on the southern entrance to the town, held by the Al Qaeda-linked Movement for Jihad and Oneness (MUJAO) since June.

The security source did not mention any fighting.

Other sources said the Islamists had left the town after the start of a French-led military offensive on January 11 to stop a triad of Al Qaeda-linked groups from pushing down from their northern bastions towards Bamako.

In April last year, Gao, Timbuktu and Kidal were seized by an alliance of Tuareg rebels -- who wanted to declare an independent homeland in the north -- and hardline Islamist groups.

The Islamist groups include MUJAO, Ansar Dine, a homegrown Islamist group, and Al-Qaeda in the Maghreb, of which MUJAO is an offshoot.

The Islamists quickly sidelined the Tuaregs to implement their own Islamic agenda. They imposed a harsh interpretation of sharia law, flogging, stoning and executing transgressors, forbidding music and television and forcing women to wear veils.

- AFP/ck



Read More..

'Anonymous' threatens Justice Department




















A screenshot at 3:35 a.m. ET on January 26, 2013, of the homepage of the United States federal sentencing website after it had been hacked by a group that identified itself as "Anonymous."




STORY HIGHLIGHTS


  • Anonymous is believed to be the loosely defined collective of so-called "hacktivists."

  • The threat note said anger over the death of Internet activist Aaron Swartz




(CNN) -- Hackers claiming to be from the group "Anonymous" threatened early Saturday to release sensitive information pertaining to the U.S. Department of Justice.


After taking over the website of the U.S. government agency responsible for federal sentencing, the hackers posted a message signed "Anonymous," in which they demand that the United States reform its justice system or face the release of "warheads" of incriminating information.


Anonymous is believed to be the loosely defined collective of so-called "hacktivists" who oppose attempts to limit Internet freedoms.


There was a long threat note and a YouTube video and a list of files named after U.S. Supreme Court justices.


'Anonymous' threatens Westboro Baptist


The threat note said anger over the death of Internet activist Aaron Swartz, who committed suicide on January 11, triggered the posting.


Swartz, 26, was facing federal computer fraud charges and could have faced 35 years in prison.


His family has issued a statement saying that federal charges filed over allegations that he stole millions of online documents -- mostly scholarly papers -- from MIT through the university's computer network contributed to Swartz's decision to take his own life.


Swartz's suicide inspired a flurry of online tributes and mobilized Anonymous. They claimed credit for defacing several MIT websites in response.


A review of a cached version of the USSC.gov website shows the Anonymous message on its homepage since at least 1:40 a.m. ET.


Efforts to get to the website was unsuccessful by some by 6 a.m. E.T.


CNN's Jason Moon and AnneClaire Stapleton contributed to this report











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A new airport is poised to bring modern tourism to little-visited Chiloe Island. Locals wonder what being "discovered" will mean for them.



















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Notre Dame president defends handling of Te'o case

SOUTH BEND, Ind. Top administrators at Notre Dame decided within hours of hearing about the Manti Te'o dead girlfriend hoax that it did not involve a crime and within two days had concluded there was no NCAA violation, according to a letter sent by the university president to board of trustee members on Friday.

The Rev. John Jenkins told trustees that despite "the unrelenting scrutiny of hundreds of journalists and countless others — and repeated attempts by some to create a different impression- no facts relating to the hoax have been at odds with what Manti told us" on Dec. 27-28.

The letter was obtained Friday by The Associated Press from a university official who provided it on condition of anonymity because the private school's internal workings are confidential.

The eight-page document, including a four-page letter from Jenkins and a four-page outline of how Notre Dame handled the hoax, is both a defense and an explanation of the school's actions.

"We did our best to get to the truth in extraordinary circumstances, be good stewards of the interests of the university and its good name and — as we do in all things — to make the well-being of our students one of our very highest priorities," Jenkins concluded in his letter.

Some of the timeline Notre Dame outlined is well known, including that its star linebacker disclosed the scam to his coaches the day after Christmas and it remained unknown to the public until Deadspin.com broke the story on Jan. 16, long after the Fighting Irish lost the BCS championship to Alabama on Jan. 7.

Jenkins wrote that Notre Dame officials talked in the hours after hearing from Te'o on Dec. 26 and agreed there was no indication of a crime or student conduct code violation. Athletic director Jack Swarbrick spoke with Te'o the next day, and on Dec. 28 the school concluded there were no indications of an NCAA rules violation, which could have put Notre Dame's 12-0 regular season in jeopardy.

The school then made moves to find out who was behind the hoax, thereby protecting Te'o and itself.

"For the first couple of days after receiving the news from Manti, there was considerable confusion and we simply did not know what there was to disclose," Jenkins wrote.





13 Photos


Manti Te'o




On Jan. 2, after several days of internal discussion and a week after Te'o's disclosure, Notre Dame retained Stroz Friedberg, a New York computer forensics firm to investigate the case and whether any other football players had been targeted. The firm did not return phone or email messages left Friday.

Notre Dame officials believed Te'o's girlfriend — whether alive or dead — was at least a real person until the next day, when Stroz Friedberg said it could not find any evidence that Kekua or most of her relatives ever existed. And by Jan. 4, two days after hiring Stroz Friedberg, Notre Dame officials concluded Te'o was the victim of the hoax, there was no threat to the school and the private investigation was suspended.

"We concluded that this matter was personal to Manti," Jenkins wrote, deciding it was up to Te'o to disclose, especially after he signed with Creative Artists Agency on the day after the BCS game.


1/2


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WH, Senators to Begin Push on Immigration Reform












The White House and a bipartisan group of senators next week plan to begin their efforts to push for comprehensive immigration reform.


President Barack Obama will make an announcement on immigration during a Tuesday trip to Las Vegas, Nevada, the White House said on Friday. The Senate group is expected make their plans public around the same time, the Associated Press reported.


See Also: Where Do Labor Unions Stand on Immigration?


For Obama, immigration reform is a campaign promise that has remained unfulfilled from his first White House run in 2008. During his 2012 re-election campaign, the president vowed to renew his effort to overhaul the nation's immigration system. It has long been expected that Obama would roll out his plans shortly after his inauguration.


The president's trip to Las Vegas is designed "to redouble the administration's efforts to work with Congress to fix the broken immigration system this year," the White House said.


Ever since November's election, in which Latino voters turned out in record numbers, Republicans and Democrats have expressed a desire to work on immigration reform. Obama has long supported a bill that would make many of the nation's 11 million undocumented immigrants without criminal records eligible to apply for an earned pathway to citizenship, which includes paying fines and learning English.






Charles Dharapak/AP Photo







But the debate over a pathway to citizenship is expected to be contentious. Other flashpoints in an immigration reform push could include a guest-worker program, workplace enforcement efforts, border security, and immigration backlogs.


In a statement, the White House said that "any legislation must include a path to earned citizenship."


Ahead of his immigration push next week, Obama met today with a group of lawmakers from the Congressional Hispanic Caucus (CHC), including chairman Rubén Hinojosa (D-Texas) , Sen. Bob Menendez (D-N.J.), Democratic Caucus Chair Rep. Xavier Becerra (D-Calif.), and CHC Immigration Task Force Chair Rep. Luis Gutierrez (D-Ill.), the latter's office said. CHC members are expected to play a pivotal role in the debate.


"The president is the quarterback and he will direct the team, call the play, and be pivotal if we succeed. I am very optimistic based on conversations with Republicans in the House and Senate that we will do more than just talk about the immigration issue this year," Gutierrez said in a statement following the CHC meeting with Obama. "The president putting his full weight and attention behind getting a bill signed into law is tremendously helpful. We need the president and the American people all putting pressure on the Congress to act because nothing happens in the Capitol without people pushing from the outside."


A bipartisan group of eight senators, which includes Menendez, has also begun talks on drafting an immigration bill and will play an integral part in the process of passing a bill through Congress. Sen. Marco Rubio (R-Fla.), who has been participating in talks with others senators, has also unveiled his own outline for an immigration proposal.


The group of senators have reportedly eyed Friday as the date when they'll unveil their separate proposal, according to the Washington Post.



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Uncharted territory: Where digital maps are leading us


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Football: Balotelli going nowhere this month, says Mancini






MANCHESTER, United Kingdom: Manchester City manager Roberto Mancini has once again rejected speculation linking Mario Balotelli with AC Milan and admits he is struggling to add to his squad ahead of next week's transfer deadline.

The Italy striker has made just seven Premier League starts this season after a string of controversial incidents.

Balotelli, 22, attempted to take the club to a Premier League tribunal in December after contesting fines for his poor disciplinary record.

Milan vice president Adriano Galliani has told City they need to lower their asking price for Balotelli, who has also been linked with a loan move to the San Siro.

But Mancini has dismissed the prospects of Milan signing Balotelli before the transfer window closes on Thursday.

He also added that it would be "difficult" for City to sign more players themselves and stated that it is not just Balotelli that he is looking to keep hold of.

Mancini said: "For two years it's always the question. It's not true. Mario's staying here. We haven't had any requests about Mario or any other player.

"Mario has another three years on his contract.

"We don't have enough players, we are 18 players now and we can't sell any players.

"Every day we talk about Mario. There is sometimes speculation about Mario."

Mancini has also played down reports that director of football Txiki Begiristain, who joined the club from Barcelona last year, has stipulated that City will play in a 4-3-3 system and all future signings will be purchased with that shape in mind.

The City manager insists it would be wrong to attempt to copy Barcelona's playing style.

He added: "I don't know but I speak with Txiki every day and he never told me this and we have the same thoughts about football and it's not more important to play 4-3-3, 4-4-2 or 4-5-1, it's important to have good players.

"Everyone wants to play like Barca but Barca is one, like Real Madrid or AC Milan, it's impossible to play like Barca but you can win if you play different styles.

"We are agreeing about everything because we think the same about football. We are the same. We don't have a different view."

French midfielder Samir Nasri is Mancini's only fresh injury concern ahead of their FA Cup fourth round trip to Stoke on Saturday.

The former Arsenal man has been struggling with illness and may miss the game at the Britannia Stadium.

City beat Stoke in the 2011 final to end a 35-year trophy drought in Mancini's first full season in charge.

The Italian then guided the club to the league title last season but has never contemplated what might have happened to him if City had not won the cup two years ago.

He said: "I don't think about this. We wanted to win that final, to start to win and it was an important moment for us. We want to try to do this every year if it's possible.

"We have the FA Cup and Premier League this year and we want to try to win. It's important for us to try to win every year.

"I have good memories. It was a fantastic moment to win a trophy after 35 years. It was important because we worked hard and it was good for the club and the supporters. A really good moment.

"I think that not only for us, every team that goes to the Britannia has a problem because Stoke are strong, physical and every team has a problem with this but in the last two years we've played well, had chances to win and been unlucky."

-AFP/ac



Read More..

Te'o reveals biggest regret






STORY HIGHLIGHTS


  • NEW: Te'o says he was embarrassed to discuss girlfriend upon learning she was fake

  • NEW: But while admitting some were misled, he says he "didn't lie" publicly

  • Te'o has his first on-camera interview since news broke of the girlfriend hoax

  • "I wasn't as forthcoming about (the story), but I didn't lie," he tells Katie Couric




(CNN) -- He had wanted to help someone in need, this beautiful girl who had been through so much. And he ended up falling for her. They had much in common -- a strong faith, their Samoan heritage, common values -- and clicked, even though they'd never met face-to-face.


Their relationship ended, the first time, in September when Manti Te'o got a call from her hysterical brother telling him the woman he knew as Lennay Kekua had died, one day after leaving the hospital where she was being treated for leukemia.


Two months later, the relationship unraveled again, this time when he got another call from someone who claimed she was Lennay, very much alive.


In the weeks to follow -- until and after Deadspin broke the story January 16 that Lennay Kekua didn't exist, despite Te'o's repeated references to her and her death in interviews -- the Notre Dame star player admitted feeling embarrassed, scared and overwhelmed.









Notre Dame star Manti Te'o















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In his first on-camera interview since then, Te'o said that, publicly, he'd always been truthful.


"For people feeling that they were misled, that I'm sorry for," he told Katie Couric, on an episode of her talk show that aired Thursday. "I wasn't as forthcoming about it (as I could have been).


"But I didn't lie."


Then why, Couric asked, had he said the two met through his cousin and at a game his sophomore year, when he now says she had reached out to him on Facebook? Why had he told his father that he and Kekua had gotten together once in Hawaii?


And why hadn't he had stronger doubts before this winter? Like how, in their FaceTime chats, her screen always appeared black? Or how every in-person meeting they set up fell through, like when she was hospitalized or the time her brother had borrowed her car?


Or how odd was it that, in the months he'd gotten to know her well, a 22-year-old woman had a near-death accident then came down with cancer? And through all her struggles, why didn't he visit her once in the hospital -- even when he was in Southern California, like her, and she was in a coma?


Te'o said he understands why people might doubt their relationship, and him. But he told Couric that his feelings in the relationship -- and after the supposed death -- were authentic.


"What I went through was real. The feelings, the pain, the sorrow ... that was all real," said the standout linebacker and Heisman runner-up. "That's something I can't fake."


Te'o admits lying to father, not to others


The two, Te'o at Notre Dame and Kekua at Stanford University, first got acquainted his freshman year, after she reached out to him on Facebook, he said. Those first few years, they would converse but "it was a friend relationship," Te'o told Couric.










Their relationship began to go to another level, he explained, during his junior year. As it did, Te'o admitted to having his doubts, even reaching out to some others to confirm Kekua was real.


"That was my way of saying, 'Oh she's real, they met her, they've seen her,'" Te'o said of his conversations with friends. "This girl who was in the pictures, and this girl I was talking to must be the same."


But while they talked for hours, they never met face-to-face. Once, Kekua told Te'o she was in his home state of Hawaii, and the two planned to meet. He told Couric she had told him her brother had her car and she couldn't drive to him, but invited him to her hotel.


That meeting never panned out. Still, the next morning, Te'o admitted telling his father the two had, in fact, seen each other. Brian Te'o later mentioned in interviews how his son had met up with Kekua in Hawaii.


That conversation with his father, Te'o told Couric, was "the biggest lie."


"That's the thing I regret most," he said. "That's my way of trying to get my dad's approval of this young lady. Because I knew if he knew I didn't meet her, he would immediately just say no, (it is a) red flag that I obviously should have seen."


The relationship continued. On the talk show "Katie," tapes were played of voice mails left by the woman Te'o said he thought was Kekua. In one, she talked about starting her first session of chemotherapy. In another, she suspiciously called him out after she said another woman answered his phone. In another, she wished him good night: "I'll talk to you tomorrow. I love you so much hon. Sweet dreams."


In an off-camera interview January 18 with ESPN, Te'o said a man named Ronaiah Tuiasosopo was behind the hoax, saying Tuiasosopo had called him earlier this month to apologize. While Tuiasosopo or his father haven't talked publicly, his uncle recently defended him, saying, "It definitely takes two to tango."


Responding to reports Kekua may have been voiced by Tuiasosopo, Te'o said, "It sounded like a woman, but if (a man) somehow made that voice,... that's incredible talent to do that, especially every single day."


A near-death accident then a bout with leukemia


They planned to meet while he was in San Diego, but then she was severely injured in April after being struck by a drunk driver, Te'o said. He could have missed his flight to either Los Angeles or, eventually, Hawaii to be with her, but he didn't.


Manti Te'o denies he was part of girlfriend hoax


"It was a conversation that I didn't want to have with my parents," Te'o told Couric. "To say, 'Uh Mom, Dad, I missed my flight ... because I'm going to see Lennay in the hospital.' "


While she was in a coma at the hospital, Te'o said her relatives held a phone up to her ear and he talked. Nurses said the sound of his voice would cause her breath to quicken, and he'd hear the respirator and "the machines. It was very real."


She awoke from the coma, he said, as he was talking -- whispering his name and causing him to jump for joy, feeling he'd helped her.


"It goes back to what my parents taught me, to always be there for somebody when they need help," Te'o said.


There were more talks in the subsequent months, not just between the two but also involving Te'o's family. He said he was most hurt, most ashamed because the apparent hoax hurt not just him, but his father and mother.


"The belief in this person, the deception, wasn't only with Manti, it was our entire family," his mother, Ottilia Te'o, told Couric. "We had conversations with this person. So in our mind, we had followed the same pattern as Manti."


Te'o: 'I was just scared and I didn't know what to do'


Te'o said he was told that, on September 12, Kekua suddenly started to breathe hard, to sweat and, at 10:47 p.m., she died.


That was the same day his grandmother died. Three days later, he led the Fighting Irish to a 20-3 rout of Michigan State, saying he had been inspired to honor the two women with his play.


"I miss 'em, but I know that I'll see them again one day," he told ESPN at the time.


Even in death, Kekua continued to come up in interviews and elsewhere. She was part of Te'o's story.


Then came the December 6 phone call, from a woman he first thought was Kekua's sister. But then, he recalled, "She said, 'No Manti, it's Lennay.' "


"There was a long silent pause," Te'o said. "And I was angered to say the least."


Despite his renewed doubts, he kept talking -- including at the Heisman presentation on December 8, when he referred to his girlfriend losing her battle with cancer. A Twitter picture sent later that month showing the girl he thought was Kekua, holding a sign with that day's date, convinced him it was all a lie.


But he still didn't know what to do, or what to say.


"Part of me was saying if you say that she's alive, what would everybody think? What are you going to tell everybody who followed you, who you've inspired? What are you going to say?


He added: "I was scared. That's the truth. I was just scared, and I didn't know what to do."


On Christmas Day, he sat down with his parents in Hawaii.


Parents defend Te'o: 'He's not a liar, he's a kid'


This conversation led to one with Notre Dame coaches and administrators. But the school was mum until the Deadspin story came out.


That was followed by many stories as well as speculation about what happened and why. Did Te'o help concoct the hoax to promote his Heisman hopes? He said no. Did he help invent this relationship because he's gay? That, too, isn't true, he said.


It's uncertain how this scandal will affect his standing in the upcoming NFL Draft, set for April. Te'o said he's hoping for the best, though most disappointed in how he's hurt his family.


"The greatest joy in any child's life is to make your parents proud," he said. "The greatest pain is to know that they are experiencing pain because of you."


On the "Katie" show, his mother said she's proud of how her son has handled this entire situation -- saying that, in befriending who he thought was Kekua, he showed he "always puts others before himself."


His father said it's easy to spot the red flags in retrospect. But he said this ordeal hasn't rattled his faith in his son.


"He's not a liar. He's a kid," Brian Te'o said. "He's a 21-year-old kid trying to be a man."


CNN's Eliott C. McLaughlin contributed to this report.






Read More..

Battery expert: "I would not fly in a Dreamliner"

(CBS News) WASHINGTON - Investigators say they still don't know what caused batteries to burn in two Boeing 787 Dreamliners, and until they figure that out and how to fix the problem, none of the planes will be allowed to fly.

More than any other plane, the Dreamliner relies on lithium ion batteries to help power its advanced electrical system. They're lighter and more powerful than older battery types, but they contain a highly flammable liquid electrolyte.

U.S. officials defend handling of 787 mishaps

Boeing 787 probe turns to battery companies

Boeing plans to carry on with Dreamliner production

Federal investigators are examining the disassembled battery from the 787 that caught fire in Boston January 7, spewing molten electrolyte.

George Blomgren worked for Eveready, a batteries and flashlights company, for 40 years. He says lithium ion batteries are bundled together for the 787, and that increases the risk.

"These fires burn at very high temperatures, so they are just very dangerous fires," he said.


George Blomgren, a battery expert for Eveready

George Blomgren, a battery expert for Eveready


/

CBS News

The Boston fire, and the burned-out battery on a Dreamliner in Japan, is not the first time lithium ion batteries have caused problems.

In 2011, a Chevy Volt lithium ion battery was damaged in a crash test. Three weeks later, it burst into flames. Chevrolet installed a number of fixes to prevent fires.

Safety features also were added to lithium ion batteries in some cell phones and laptops after 56 million were recalled for risk of overheating and exploding.

Boeing says lithium ion batteries "best met the performance and design objectives of the 787" and "Based on everything we know at this point, we have not changed our evaluation."

Blomgren considers the safety of lithium ion batteries on planes questionable.

"From what I know about incidents, I would not fly in a Dreamliner tomorrow. I just wouldn't feel that it was appropriate or safe," Blomgren said.

Many experts believe in the promise of lithium ion batteries, including for airlines, but they just aren't sure its safety has been perfected.

Read More..

It's Official: Women Will Serve in Combat













Women will soon be able to serve in combat, as things officially changed with the stroke of a pen today at the Pentagon.


At a joint news conference, Secretary of Defense Leon Panetta and Joint Chiefs of Staff Charman Gen. Martin Dempsey signed a memorandum rolling back a 1994 directive prohibiting women from doing so.


"They serve, they're wounded, and they die right next to each other," Panetta said of women and men in the military. "The time has come to recognize that reality.


"If they're willing to put their lives on the line, then we need to recognize that they deserve a chance," Panetta said, noting that he wants his own granddaughters and grandsons to have the same opportunities in their lives and careers.


The change won't be immediate, however. While Panetta announced that thousands of new positions will now be open to women, he has asked the military branches to submit plans by May on how to integrate women into combat operations. He set a January 2016 deadline for branches to implement the changes, giving military services time to seek waivers for certain jobs.


Both Panetta and Dempsey said they believe the move will strengthen the U.S. military force.








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"Ultimately, we are acting to strengthen the armed forces," Dempsey said. "We will extend opportunities to women in a way that maintains readiness, morale and unit cohesion."


Women have already served in combat in Iraq and Afghanistan, as ABC News' Martha Raddatz and Elizabeth Gorman reported in 2009: Prohibited from serving in roles "whose primary mission is to engage in direct combat on the ground," women in support roles, nonetheless, served in support roles on the frontlines, where they have fought, been wounded and died.


Women have also flown combat missions since 1993 and have served on submarines since 2010.


Panetta noted that 152 women have died serving in the U.S. military in Iraq and Afghanistan. Dempsey said he realized a change was inevitable when he noticed two female turret gunners protecting a senior military officer.


"It's clear to all of us that women are contributing in unprecedented ways to the military's mission of defending the nation," Panetta said. "Women represent 15 percent of the force of over 200,000 [and] are serving in a growing number of critical roles on and off the battlefield.


"I've gone to Bethesda to visit wounded warriors, and I've gone to Arlington to bury our dead. There's no distincton."


Panetta and Dempsey said President Obama supported the move, while warning them to maintain military readiness as they considered the change.


Obama hailed the move in a written statement


"Today, by moving to open more military positions -- including ground combat units -- to women, our armed forces have taken another historic step toward harnessing the talents and skills of all our citizens," he said.


"This milestone reflects the courageous and patriotic service of women through more than two centuries of American history and the indispensable role of women in today's military," Obama said.






Read More..