Human hands evolved so we could punch each other









































Forget toolmaking, think fisticuffs. Did evolution shape our hands not for dexterity but to form fists so we could punch other people? That idea emerges from a new study, although it runs counter to conventional wisdom.











About the same time as we stopped hanging from trees and started walking upright, our hands become short and square, with opposable thumbs. These anatomical changes are thought to have evolved for tool manipulation, but David Carrier at the University of Utah in Salt Lake City has an alternative explanation.













He says there are several possible hand shapes that would have allowed greater dexterity, making it less clear why we ended up with the hands we have. But only one hand shape lets us make a fist with a thumb as buttress.












Among primates' hands, ours is unique for its ability to form a fist with the thumb outside the fingers. The fingers of other primates' hands are too long to curl into their palms, and their thumbs are too short to reach across the fingers. So when apes fight, they are far more likely to wrestle or hold their opponent down while others stomp on him, says Carrier.












To test the importance of fists, Carrier and his colleagues recruited 10 athletes and measured how hard they could hit a punching bag using a normal fist, a fist with the thumb stuck out, and with an open palm.












The athletes could generate more than twice the force with a normal fist as with the thumb-stuck-out fist, because of thumb's buttressing role. There was no difference in the force they could generate with a normal fist and with an open palm, but Carrier says it's possible that a fist concentrates the force into a smaller area and so does more damage.











Cause or effect?













Mary Marzke of Arizona State University in Tempe says the study is interesting, but it far from proves that the ability to make a strong fist was the main driver behind the evolution of our hands' shape. It is more likely that it was a useful side effect of a whole suite of modifications.












She points out that apes strike with the heel of their hand when knocking fruit out of trees. Carrier's study didn't assess the force that the heel of the hand generates, but if it turns out to be as good as a fist, it becomes less clear that our hands evolved so as to be perfect for fist-making, Marzke says.











But if the hypothesis is true, Carrier thinks it could explain another mystery. It has long been unclear why high levels of testosterone cause men's ring fingers to be longer than their index fingers. He says the finger-length ratio makes sense if it generates a better fist. This would make dominant males even better fighters.













Journal reference: Journal of Experimental Biology, doi:10.1242/jeb.075713


















































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.




































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Australia customs upheaval over Sydney airport graft






SYDNEY: Australia announced an overhaul of its customs service on Thursday after eight people were arrested in a corruption investigation linked to an alleged drugs ring at Sydney airport.

"I am working on major structural and cultural reforms to Customs and will announce them next year," Home Affairs Minister Jason Clare said.

"There is no place for corruption in our law enforcement agencies. Where it exists we have to weed it out."

The move follows the recent arrests of a customs officer, another from the quarantine service and six members of the public after a two-year probe. They have been charged with a range of offences including drug trafficking, receiving bribes and abuse of public office.

Police said the inquiry was continuing amid allegations that an "entrenched network" of corrupt customs officers at Sydney airport have been working with organised crime figures to import drugs.

A six-month investigation by Fairfax Media and the Australian Broadcasting Corporation said up to 20 officials were suspected of being involved in importing pseudoephedrine, cocaine, steroids and possibly weapons.

Australian Customs and Border Protection Service acting chief Michael Pezzullo said he was disappointed but not surprised by the revelations.

"We identified that we had a potential problem at Sydney International Airport and took appropriate investigative activity. This action continues," he said.

"We will review as required the role of workplace culture, management and leadership and take all necessary action to ensure the integrity of our workforce."

Australian Federal Police Commissioner Tony Negus claimed that couriers were sent overseas to collect drugs before returning through customs with the help of people in "trusted positions".

"What has been alleged before the court so far is that the customs officers involved in this would meet drug couriers off a plane," he said.

"They would then walk them through the primary line of customs, and then out into the waiting halls."

He added that it would also be alleged that customs officials "played a role in organising the couriers themselves to go overseas and to actually facilitate their collection of the narcotics overseas".

- AFP/al



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Tumblr rolls out its iPad app



Screenshot of Tumblr's iOS app on Apple's iPad.



(Credit:
Tumblr)


People can now enjoy Tumblr's 85.5 million blogs on Apple's
iPad. The microblogging site officially released the 3.2.3 version of its iOS app today, which brings markdown support, a new "explore" tab, and iPad optimization with landscape view.

The popular blogging platform's free app is now compatible with all versions of the iPhone released after the 3 GS, the 4th and 5th generations of the iPod touch, and the iPad. Tumblr also has an app for Android devices, which includes
Android
tablets.

Tumblr's app for iOS lets users post just about anything from their device. The app was redesigned in June, which aimed to make its interface easier to use. The Home screen has the latest posts from people users follow and buttons across the bottom for navigation. If users have several Tumblr blogs, they can easily manage them and switch between them from within the app.
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Detecting Rabid Bats Before They Bite


A picture is worth a thousand words—or in the case of bats, a rabies diagnosis. A new study reveals that rabid bats have cooler faces compared to uninfected colony-mates. And researchers are hopeful that thermal scans of bat faces could improve rabies surveillance in wild colonies, preventing outbreaks that introduce infections into other animals—including humans.

Bats are a major reservoir for the rabies virus, according to the Centers for Disease Control and Prevention (CDC) in Atlanta. Previous research shows that bats can transmit their strains to other animals, potentially putting people at risk. (Popular Videos: Bats share the screen with creepy co-stars.)

Rabies, typically transmitted in saliva, targets the brain and is almost always fatal in animals and people if left untreated. No current tests detect rabies in live animals—only brain tissue analysis is accurate.

Searching for a way to detect the virus in bats before the animals died, rabies specialist James Ellison and his colleagues at the CDC turned to a captive colony of big brown bats (Eptesicus fuscus). Previous studies had found temperature increases in the noses of rabid raccoons, so the team expected to see similar results with bats.

Researchers established normal temperature ranges for E. fuscus—the bat species most commonly sent for rabies testing—then injected 24 individuals with the virus. The 21-day study monitored facial temperatures with infrared cameras, and 13 of the 21 bats that developed rabies showed temperature drops of more than 4ÂșC.

"I was surprised to find the bats' faces were cooler because rabies causes inflammation—and that creates heat," said Ellison. "No one has done this before with bats," he added, and so researchers aren't sure what's causing the temperature changes they've discovered in the mammals. (Related: "Bats Have Superfast Muscles—A Mammal First.")

Although thermal scans didn't catch every instance of rabies in the colony, this method may be a way to detect the virus in bats before symptoms appear. The team plans to fine-tune their measurements of facial temperatures, and then Ellison hopes to try surveillance in the field.

This study was published online November 9 in Zoonoses and Public Health.


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Obama Invokes Newtown on 'Cliff' Deal













Invoking the somber aftermath of the school massacre in Newtown, Conn., President Obama today appealed to congressional Republicans to embrace a standing "fair deal" on taxes and spending that would avert the fiscal cliff in 13 days.


"If there's one thing we should have after this week, it should be a sense of perspective about what's important," Obama said at a midday news conference.


"I would like to think that members of that [Republican] caucus would say to themselves, 'You know what? We disagree with the president on a whole bunch of things,'" he said. "'But right now what the country needs is for us to compromise.'"


House Speaker John Boehner's response: "Get serious."


Boehner announced at a 52-second news conference that the House will vote Thursday to approve a "plan B" to a broad White House deal -- and authorize simply extending current tax rates for people earning less than $1 million a year and little more.


"Then, the president will have a decision to make," the Ohio Republican said. "He can call on Senate Democrats to pass that bill or he could be responsible for the largest tax increase in American history."








Fiscal Cliff Negotiations: Trying to Make a Deal Watch Video









House Speaker John Boehner Proposes 'Plan B' on Taxes Watch Video









'Fiscal Cliff' Negotiations: Deal Might Be Within Reach Watch Video





Unless Congress acts by Dec. 31, every American will face higher income tax rates and government programs will get hit with deep automatic cuts starting in 2013.


Obama and Boehner have been inching closer to a deal on tax hikes and spending cuts to help reduce the deficit. But they have not yet had a breakthrough on a deal.


Obama's latest plan would raise $1.2 trillion in new tax revenue over 10 years, largely through higher tax rates on incomes above $400,000. He also proposes roughly $930 billion in spending cuts, including new limits on entitlement spending, such as slower annual cost-of-living increases for Social Security beneficiaries.


Boehner has agreed to $1 trillion in new tax revenue, with a tax rate hike for households earning over $1 million. He is seeking more than $1 trillion in spending cuts, with significant changes to Medicare and Social Security.


The president said today that he remains "optimistic" about reaching a broad compromise by Christmas because both sides are "pretty close," a sentiment that has been publicly shared by Boehner.


But the speaker's backup plan has, at least temporarily, stymied talks, with no reported contact between the sides since Monday.


"The speaker should return to the negotiating table with the president because if he does I firmly believe we can have an agreement before Christmas," said Sen. Chuck Schumer, D-N.Y., a White House ally.


Schumer said Obama and Boehner are "not that far apart" in the negotiations.


"If they were to come to an agreement by Friday, they could write this stuff over the Christmas break and then we'd have to come back before the New Year and pass it," Schumer said.


Obama said he is "open to conversations" and planned to reach out to congressional leaders over the next few days to try to nudge Republicans to accept a "fair deal."


"At some point, there's got to be, I think, a recognition on the part of my Republican friends that -- you know, take the deal," he told reporters.


"They keep on finding ways to say no, as opposed to finding ways to say yes," Obama added. "At some point, you know, they've got take me out of it and think about their voters and think about what's best for the country."



Read More..

Today on New Scientist: 18 December 2012








Violent polar storms help control the world's weather

Without the mini-hurricanes which form over the Arctic, the world could face massive weather disruption



Ancient city of Troy rebranded itself after war

Changing styles of pottery 3200 years ago show the Trojans were quick to align themselves with the region's new political power



Court ruling will clarify end-of-life decisions

Canada's supreme court will soon rule on whether doctors can stop treatment for "unconscious" patients, but determining awareness remains a thorny issue



Colourful claw of tiny ocean predator

See a prizewinning photo of the claw of a Phronima: a tiny marine predator whose size belies its ferocity



Gaming chair mimics a full-motion simulator

If you can't afford a full-motion flight or car simulator, here's a cheap way of creating some of the same effects



How an ancient Egyptian code unmasked a cannibal star

Has a papyrus from the time of the pharaohs exposed the ghoulish habits of the baleful Demon Star? Stephen Battersby investigates



Best videos of 2012: Bonobo genius makes stone tools

Watch a creative bonobo fashion tools to retrieve hidden food, at number 9 in our countdown of the year's best videos



Is the obesity epidemic caused by too much sugar?

In Fat Chance, endocrinologist Robert Lustig argues that insidious changes to our eating habits have caused disruptions to our endocrine systems



'The idea we live in a simulation isn't science fiction'

If the universe is just a Matrix-like simulation, how could we ever know? Physicist Silas Beane thinks he has the answer



Fungal frog killer hops into crayfish

Crayfish are vulnerable to the same chytrid fungus already killing frogs all over the world. The discovery provides a clue to how the disease spreads




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Squash: Nicol David in quest for 7th world title






GRAND CAYMAN, Cayman Islands: Nicol David has discovered that greater self-knowledge is helping her deal with the pressures as she tries to extend her all-time record of world titles to seven.

The already legendary Malaysian has made a flying start to her campaign here, but has had to take profound and very personal measures to help endure the stresses which only increase with time.

David carries the relentlessly heavy burden of flag-bearer for an emerging nation, is subjected to constant media demands and appearance requests, and now, in her 30th year, finds herself expected to fend off a growing bevy of younger rivals.

Hence the role of Frank Cabooter, a sports psychologist who works at the University of Amsterdam, specialising in burn-out and depression, has increased in importance for David.

"In the last two to three years he has given me a lot of insight into who I am and how I can look at understanding myself better - not just on a squash basis, but on a personal note," she confides.

"It means you have to admit to things you may not have seen or known. But at the same time if you can improve yourself if you can adjust. It's so fascinating (learning about) our mind and how it works.

"We go into what works for me, what goes through my mind, and how I manage it," adds David, who here has been feeding off the vibes of the music, the warm climate, and the friendly seaside atmosphere.

So far, she has dealt impressively with Omneya Abdel Kawy, the 2010 World Open finalist from Egypt, and Annie Au, the world number nine from Hong Kong, both in straight games and in about half an hour each.

But after more than six years unbroken as world number one, David knows her strengths and weaknesses are evolving. "As time goes on we all change, as we get older," she says.

"I'm trying to use that to my advantage. There are a lot of things to learn from. And a lot of things to understand about myself as a squash player and my own growth.

"All this changed me and kept me in tune (with my feelings)."

David has occasionally revealed signs of human frailty, but when it has happened she has tried to learn why it emerged, and worked to develop her capacity to deal with it.

A notable example was when she lost her British Open title three years ago with a hesitant quarter-final defeat to Ireland's Madeline Perry.

That is why another quarter-final match with Perry here Wednesday may offer an insight into the champion's mental growth and personal development.

David had a rest day on Tuesday in which to prepare. But her focus is unlikely to be on the quality of her opponent's skills, but the entwining of her own tactical concerns with her state of mind.

"It's always a good match with Madeline, but I know how important it is to focus more on my game and what I have to do," the record-breaking champion said. "I have to bring my game up - and make sure I bring it with me to the court."

- AFP/al



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Upgrading RAM? Save your old RAM and your packaging



Besides installing an SSD to replace a mechanical hard drive, RAM upgrades are one of the more significant and beneficial upgrades you can do for a PC system. When it comes to Apple's systems, however, RAM upgrades from Apple itself have been insanely expensive, so my recommendation has always been, unless the RAM is soldered to the motherboard (as it is with the
MacBook Air and Retina
MacBook Pro), to purchase only the base amount of RAM and then upgrade it yourself later on.


Such was the case with my most recent
Mac, a 17-inch 2011 MacBook Pro that I purchased with a mere 4GB of RAM to avoid the additional $200 Apple was asking for the upgrade to 8GB. (Apple has since adjusted its prices, though they are still quite high.) Instead, I opted to purchase a third-party 16GB Mushkin RAM upgrade for around $130, getting far more memory at less expense.

The RAM arrived and installed without a hitch, and passed Apple's Hardware Test suite and other RAM testing routines with flying colors. After performing such an upgrade, you are left with the older RAM modules that are essentially useless to the system. In some cases manufacturers offer a trade-in program for your old memory, or you may be tempted to sell the memory on eBay, give it away, or simply toss it. My recommendation is to at least keep your old RAM modules, but preferably also keep your new RAM's packaging and receipts.

Even though in most cases RAM upgrades that pass hardware testing will work just fine for the lifetime of the computer, there are occasions when a problem can be introduced that will escalate over time and result in complete system failure.

It started with a crash
After having the Mushkin RAM in my system for nine months, often using it to its full capacity, I ran into a single kernel panic a couple of weeks ago that, upon restarting, suggested a problem with some third-party kernel extensions for VirtualBox in the system. Since problems with kernel extensions are often the cause for such crashes, I uninstalled VirtualBox and removed these and other extensions that weren't in use. For awhile the problem seemed better, but a few days later the system took a downward spiral. While it would boot just fine, occasionally it would switch off and restart, or hang upon waking from sleep and require a forced reboot. These behaviors became more frequent, but still happened only a few times over the space of a week so were somewhat tolerable.

The final stage of the problem began when the system automatically restarted but then would not boot, and instead output three loud beeps (with corresponding flashes of the of the power LED) that repeated indefinitely. These signals are Apple's indicator that something is very wrong with the hardware of the system, the three beeps translating to bad RAM that cannot be used. Forcing the system to power off and back on resulted in it booting again; however, a little later it crashed again, this time remaining at the hardware failure tones. It was dead.

It felt like the system had just sipped from the wrong cup in "Indiana Jones and the Last Crusade," and was withering before my eyes.

Granted, the three beeps indicated a problem with the RAM itself, but the most reliable way to test this is to install working RAM modules and see if the system boots without issue. Until that's determined, however, it's possible that a deeper problem could be at play. Of course not having Apple's "AppleCare" protection plan made the potential costs of this issue a cause for significant worry. Not only might the repairs be expensive, but Apple no longer makes my beloved 17-inch MacBook Pro system, should the issue be costly enough to require a new computer -- doubtful, but understandably that's one of the scenarios going through one's mind in a situation like this.

Repercussions and remedy
Luckily, instead of getting rid of the original RAM after the upgrade, I had stored it in a safe place, which ended up being the savior of the day. Replacing the Mushkin RAM with the original RAM resulted in a solid boot and a stable system that has been running fine ever since. The fix took minutes instead of hours waiting for local stores to open (and likely sell RAM at a premium), or to take the system to Apple. To me, option of getting back up and running was worth far more than the price of the trade-in. For this reason, I recommend that if you have upgraded your RAM, to keep your old modules as a backup just in case something goes awry.

Also, when you purchase new RAM it comes in molded plastic packaging. This is ideal for securely storing your old modules, ensuring they stay dust-free and are not subject to physical damage.

Finally, should you find yourself in this predicament, there is a light at the end of the tunnel. Most RAM manufacturers guarantee their products for life, which means that if it happens to you, you'll likely be able to arrange a replacement at minimal cost. You'll probably need your original proof of purchase for such an exchange, so print it out and store it with the old RAM so you have a one-stop fall-back-and-replacement package available.



Questions? Comments? Have a fix? Post them below or !
Be sure to check us out on Twitter and the CNET Mac forums.

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Race Is On to Find Life Under Antarctic Ice



A hundred years ago, two teams of explorers set out to be the first people ever to reach the South Pole. The race between Roald Amundsen of Norway and Robert Falcon Scott of Britain became the stuff of triumph, tragedy, and legend. (See rare pictures of Scott's expedition.)


Today, another Antarctic drama is underway that has a similar daring and intensity—but very different stakes.


Three unprecedented, major expeditions are underway to drill deep through the ice covering the continent and, researchers hope, penetrate three subglacial lakes not even known to exist until recently.


The three players—Russia, Britain, and the United States—are all on the ice now and are in varying stages of their preparations. The first drilling was attempted last week by the British team at Lake Ellsworth, but mechanical problems soon cropped up in the unforgiving Antarctic cold, putting a temporary hold on their work.


The key scientific goal of the missions: to discover and identify living organisms in Antarctica's dark, pristine, and hidden recesses. (See "Antarctica May Contain 'Oasis of Life.'")


Scientists believe the lakes may well be home to the kind of "extreme" life that could eke out an existence on other planets or moons of our solar system, so finding them on Earth could help significantly in the search for life elsewhere.



An illustration shows lakes and rivers under Antarctica's ice.
Lakes and rivers are buried beneath Antarctica's thick ice (enlarge).

Illustration courtesy Zina Deretsky, NSF




While astrobiology—the search for life beyond Earth—is a prime mover in the push into subglacial lakes, so too is the need to better understand the ice sheet that covers the vast continent and holds much of the world's water. If the ice sheet begins to melt due to global warming, the consequences—such as global sea level rise—could be catastrophic.


"We are the new wave of Antarctic explorers, pioneers if you will," said Montana State University's John Priscu, chief scientist of the U.S. drilling effort this season and a longtime Antarctic scientist.


"After years of planning, projects are coming together all at once," he said.


"What we find this year and next will set the stage for Antarctic science for the next generation and more—just like with the explorers a century ago."


All Eyes on the Brits


All three research teams are at work now, but the drama is currently focused on Lake Ellsworth, buried 2 miles (3.2 kilometers) below the West Antarctic ice sheet.


A 12-person British team is using a sophisticated technique that involves drilling down using water melted from the ice, which is then heated to 190 degrees Fahrenheit (88 degrees Celsius).


The first drilling attempt began on December 12, but was stopped at almost 200 feet (61 meters) because of technical problems with the sensors on the drill nozzle.


Drilling resumed on Saturday but then was delayed when both boilers malfunctioned, requiring the team to wait for spare parts. The situation is frustrating but normal due to the harsh climate, British Antarctic team leader Martin Siegert, who helped discover Lake Ellsworth in 2004, said in an email from the site.


After completing their drilling, the team will have about 24 hours to collect their samples before the hole freezes back up in the often below-zero cold. If all goes well, they could have lake water and mud samples as early as this week.


"Our expectation is that microbes will be found in the lake water and upper sediment," Siegert said. "We would be highly surprised if this were not the case."


The British team lives in tents and makeshift shelters, and endures constant wind as well as frigid temperatures. (Take an Antarctic quiz.)


"Right now we are working round the clock in a cold, demanding and extreme location-it's testing our own personal endurance, but it's worth it," Siegert said.


U.S. First to Find Life?


The U.S. team is drilling into Lake Whillans, a much shallower body about 700 miles inland (1,120 kilometers) in the region that drains into the Ross Sea.


The lake, which is part of a broader water system under the ice, may well have the greatest chances of supporting microbial life, experts say. Hot-water drilling begins there in January.


Among the challenges: Lake Whillans lies under an ice stream, which is similar to a glacier but is underground and surrounded by ice on all sides. It moves slowly but constantly, and that complicates efforts to drill into the deepest—and most scientifically interesting—part of the lake.


Montana State's Priscu—currently back in the U.S. for medical reasons—said his team will bring a full lab to the Lake Whillans drilling site to study samples as they come up: something the Russians don't have the interest or capacity in doing and that the British will be trying in a more limited way. (Also see "Pictures: 'Extreme' Antarctic Science Revealed.")


So while the U.S. team may be the last of the three to penetrate their lake, they could be the first to announce the discovery of life in deep subglacial lakes.


"We should have a good idea of the abundance and type of life in the lake and sediments before we leave the site," said Priscu, who plans to return to Antarctica in early January if doctors allow.


"And we want to know as much as possible about how they make a living down there without energy from the sun and without nutrients most life-forms need."


All subglacial lakes are kept liquid by heat generated from the pressure of the heavy load of ice above them, and also from heat emanating from deeper in the Earth's crust.


In addition, the movement of glaciers and "ice streams" produces heat from friction, which at least temporarily results in a wet layer at the very bottom of the ice.


The Lake Whillans drilling is part of the larger Whillans Ice Stream Subglacial Access Research Drilling (WISSARD) project, first funded in 2009 by the U.S. National Science Foundation with funds from the American Recovery and Reinvestment Act.


That much larger effort will also study the ice streams that feed and leave the lake to learn more about another aspect of Antarctic dynamism: The recently discovered web of more than 360 lakes and untold streams and rivers—some nearing the size of the Amazon Basin—below the ice. (See "Chain of Cascading Lakes Discovered Under Antarctica.")


Helen Fricker, a member of the WISSARD team and a glaciologist at University of California, San Diego, said that scientists didn't begin to understand the vastness of Antarctica's subglacial water world until after the turn of the century.


That hidden, subterranean realm has "incredibly interesting and probably never classified biology," Fricker said.


"But it can also give us important answers about the climate history of the Earth, and clues about the future, too, as the climate changes."


Russia Returning to Successful Site


While both the U.S. and British teams have websites to keep people up to date on their work, the Russians do not, and have been generally quiet about their plans for this year.


The Russians have a team at Lake Vostok, the largest and deepest subglacial lake in Antarctica at more than 2.5 miles (4 kilometers) below the icy surface of the East Antarctic plateau.


The Vostok drilling began in the 1950s, well before anyone knew there was an enormous lake beneath the ice. The Russians finally and briefly pierced the lake early this year, before having to leave because of the cold. That breakthrough was portrayed at the time as a major national accomplishment.


According to Irina Alexhina, a Russian scientist with the Vostok team who was visiting the U.S. McMurdo Station last week, the Russian plan for this season focuses on extracting the ice core that rose in February when Vostok was breached. She said the team arrived this month and can stay through early February.


Preliminary results from the February breach report no signs of life on the drill bit that entered the water, but some evidence of life in small samples of the "accretion ice," which is frozen to the bottom of the lake, said Lake Vostok expert Sergey Bulat, of the Petersburg Nuclear Physics Institute, in May.


Both results are considered tentative because of the size of the sample and how they were retrieved. In addition, sampling water from the very top of Lake Vostok is far less likely to find organisms than farther down or in the bottom sediment, scientists say.


"It's like taking a scoop of water from the top of Lake Ontario and making conclusions about the lake based on that," said Priscu, who has worked with the Russians at Vostok.


He said he hopes to one day be part of a fully international team that will bring the most advanced drilling and sample collecting technology to Vostok.


Extreme Antarctic Microbes Found


Some results have already revealed life under the ice. A November study in the journal Proceedings of the National Academy of Sciences reported that subglacial Lake Vida—which is smaller and closer to the surface than other subglacial lakes—does indeed support a menagerie of strange and often unknown bacteria.


The microbes survive in water six times saltier than the oceans, with no oxygen, and with the highest level of nitrous oxide ever found in water on Earth, said study co-author Chris McKay, an astrobiologist at NASA's Ames Research Center.


"What Antarctica is telling us is that organisms can eke out a living in the most extreme of environments," said McKay, an expert in the search for life beyond Earth.


McKay called Lake Vida the closest analog found so far to the two ice and water moons in the solar system deemed most likely to support extraterrestrial life—Jupiter's Europa and Saturn's Enceladus.


But that "closest analog" designation may soon change. Life-forms found in Vostok, Ellsworth, or Whillans would all be living at a much greater depth than at Lake Vida—meaning that they'd have to contend with more pressure, more limited nutrients, and a source of energy entirely unrelated to the sun.


"Unique Moment in Antarctica"


The prospect of finding microscopic life in these extreme conditions may not seem to be such a big deal for understanding our planet—or the possibility of life on others. (See Antarctic pictures by National Geographic readers.)


But scientists point out that only bacteria and other microbes were present on Earth for 3 billion of the roughly 3.8 billion years that life has existed here. Our planet, however, had conditions that allowed those microbes to eventually evolve into more complex life and eventually into everything biological around us.


While other moons and planets in our solar system do not appear capable of supporting evolution, scientists say they may support—or have once supported—primitive microbial life.


And drilling into Antarctica's deep lakes could provide clues about where extraterrestrial microbes might live, and how they might be identified.


In addition, Priscu said there are scores of additional Antarctic targets to study to learn about extreme life, climate change, how glaciers move, and the dynamics of subterranean rivers and lakes.


"We actually know more about the surface of Mars than about these subglacial systems of Antarctica," he said. "That's why this work involves such important and most likely transformative science."


Mahlon "Chuck" Kennicutt, the just-retired president of the Scientific Committee on Antarctic Research, an international coordinating group, called this year "a unique moment in Antarctica."


"There's a growing understanding of the continent as a living, dynamic place—not a locked-in ice desert—and that has created real scientific excitement."


Read More..

Newtown Shooting: Bushmaster Under Fire













When the private investment firm Cerberus Capital Management announced Tuesday it would unload its interest in Bushmaster – the company that built the weapon used in last week's mass murder of 20 Connecticut first graders -- it marked the beginning of what experts say is likely to be a challenging period for the North Carolina-based weapons manufacturer.


"They are looking at a taint on their brand and looking at a marketplace that could change dramatically with respect to their weapon," said Chris Lehane, a crisis public relations expert who worked in the Clinton White House. "To me the fact that Cerberus is pulling out is a pretty significant defining moment."


For years, Bushmaster has been marketing itself to testosterone-fueled male customers, issuing "man cards" to customers who want to be "card carrying men." Now, Lehane and others said the company is facing the prospect of being branded the weapon of choice for mass killers. The Newtown, Connecticut shooting marked the fourth time a Bushmaster has been implicated in a mass shooting since 1999, including the Beltway sniper case that left 10 dead and three more wounded.


Cerberus announced Tuesday it wanted distance from Bushmaster, calling the murder of 20 first grade children at Sandy Hook Elementary School a "watershed event." The investment firm, which is chaired by former Vice President Dan Quayle, noted in its statement that Bushmaster may not be an investment consistent with the interests of its clients. Its investors include the pension plans of firemen, teachers, and policemen.






Rich Pedroncelli/AP Photo











Gun Control Debate Resurfaces After Sandy Hook Shooting Watch Video









Sandy Hook Elementary School Shooting: Victims Laid to Rest Watch Video









Sandy Hook Elementary Shooter: What Caused Shooting? Watch Video





Lehane said the announcement could signal a shift in the way investors view companies that make military style weapons for a civilian market.


"It reminds me of the time when tobacco began to be associated with a negative light, or the divestiture movement surrounding companies in South Africa," he said. "Where financial markets believe they are going to pay a price."


In addition, a spokesman for Cerberus Group confirmed that the father of Stephen Feinberg, the founder of Cerberus Group, lives in Newtown.


Gun control groups have also lined up to criticize the weapons manufacturer, arguing that the company was selling civilian customers a weapon clearly designed for war.


"This thing is just a killing machine," said Josh Horwitz, executive director of the Coalition to Stop Gun Violence. "[I]t's a weapon that can easily shoot hundreds of … In fact it's very similar to the weapon that James Holmes used to shoot up the movie theater in Aurora."


The company has not responded to phone calls seeking comment, but gun enthusiasts say the weapon's menacing appearance can appeal to civilians looking for a means to secure their homes, and its ease of use can appeal to those looking for a weapon for target shooting.


"The [assault rifle] platform is the most popular in the country," said Frank Cornwall, a firearms instructor in Connecticut. "Civilians have always bought similar type arms to the military. And this is a very versatile platform. Quite a popular hunting and target shooting gun."


Phillip Stutts, a crisis management consultant who worked for President George W. Bush, said he has been surprised by the silence of the gun manufacturer.


"Bushmaster doesn't have to take responsibility for this tragedy, but they have a responsibility to respond to this tragedy," he said. "And they haven't. They have to get out in front of this. It needs to be corrected ASAP."






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