Hollies Get Prickly for a Reason



With shiny evergreen leaves and bright red berries, holly trees are a naturally festive decoration seen throughout the Christmas season.


They're famously sharp. But not all holly leaves are prickly, even on the same tree. And scientists now think they know how the plants are able to make sharper leaves, seemingly at will. (Watch a video about how Christmas trees are made.)


A new study published in the Botanical Journal of the Linnean Society suggests leaf variations on a single tree are the combined result of animals browsing on them and the trees' swift molecular response to that sort of environmental pressure.


Carlos Herrera of the National Research Council of Spain led the study in southeastern Spain. He and his team investigated the European holly tree, Ilex aquifolium. Hollies, like other plants, can make different types of leaves at the same time. This is called heterophylly. Out of the 40 holly trees they studied, 39 trees displayed different kinds of leaves, both prickly and smooth.



Five holly leaves from the same tree.

Five holly leaves from the same tree.


Photographs by Emmanuel Lattes, Alamy




Some trees looked like they had been browsed upon by wild goats and deer. On those trees, the lower 8 feet (2.5 meters) had more prickly leaves, while higher up the leaves tended to be smooth. Scientists wanted to figure out how the holly trees could make the change in leaf shape so quickly.


All of the leaves on a tree are genetic twins and share exactly the same DNA sequence. By looking in the DNA for traces of a chemical process called methylation, which modifies DNA but doesn't alter the organism's genetic sequence, the team could determine whether leaf variation was a response to environmental or genetic changes. They found a relationship between recent browsing by animals, the growth of prickly leaves, and methylation.


"In holly, what we found is that the DNA of prickly leaves was significantly less methylated than prickless leaves, and from this we inferred that methylation changes are ultimately responsible for leaf shape changes," Herrera said. "The novelty of our study is that we show that these well-known changes in leaf type are associated with differences in DNA methylation patterns, that is, epigenetic changes that do not depend on variation in the sequence of DNA."


"Heterophylly is an obvious feature of a well-known species, and this has been ascribed to browsing. However, until now, no one has been able to come up with a mechanism for how this occurs," said Mike Fay, chief editor of the Botanical Journal of the Linnean Society and head of genetics at the Kew Royal Botanic Gardens. "With this new study, we are now one major step forward towards understanding how."


Epigenetic changes take place independently of variation in the genetic DNA sequence. (Read more about epigenetics in National Geographic magazine's "A Thing or Two About Twins.")


"This has clear and important implications for plant conservation," Herrera said. In natural populations that have their genetic variation depleted by habitat loss, the ability to respond quickly, without waiting for slower DNA changes, could help organisms survive accelerated environmental change. The plants' adaptability, he says, is an "optimistic note" amidst so many conservation concerns. (Related: "Wild Holly, Mistletoe, Spread With Warmer Winters.")


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Boehner Pulls Plan B Option













In a surprise development late Thursday night, House Speaker John Boehner pulled his so-called "Plan B option" -- an extension of current tax rates for Americans making up to $1 million a year -- from the House floor, admitting that it did not have the support necessary to pass and leaving a resolution to the fiscal cliff in question.


"The House did not take up the tax measure today because it did not have sufficient support from our members to pass. Now it is up to the president to work with [Democratic Senate Majority Leader Harry] Reid on legislation to avert the fiscal cliff," Boehner, R-Ohio, wrote in a statement. "The House has already passed legislation to stop all of the Jan. 1 tax rate increases and replace the sequester with responsible spending cuts that will begin to address our nation's crippling debt. The Senate must now act."


Immediately after the announcement that "plan B" had failed, Dow Jones Industrial futures traded down, with other stock indicators also signaling sharp losses and volatility for Friday morning's opening -- though stock futures generally are lightly traded in the evening. Indicators soon bounced off the initial lows but still signaled a rough start to the final trading session of the week.


In Washington, all legislative business has concluded for the week. House Majority Leader Eric Cantor's office said that members could still return "after the Christmas holiday when needed" if a breakthrough is eventually reached.






Jacquelyn Martin/AP Photo













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The outlook for a deal to avert the "fiscal cliff" by Christmas has reached a new low, with no clear path forward, though lawmakers and the White House maintained hope this week for a deficit-reduction compromise by the end of the year.


A senior aide to the speaker confirmed late Thursday evening that Boehner and Obama still have not spoken since Monday evening, when the speaker told the president that he would move ahead with his backup plan, although staff-level talks have continued behind the scenes.


"Speaker Boehner tried to play hardball by asking his members to vote for a tax increase. He learned the hard way that you must find a bipartisan solution," one senior House Democratic leadership aide said reacting to the developments. "Walking away has considerably weakened him and put the country literally on the precipice of the cliff."


Republicans had sought to act to avoid an income tax hike on 99 percent of Americans in 2013, and leverage new pressure on President Obama in the ongoing talks for a broader "cliff" deal.


Obama has threatened to veto the legislation, calling it counterproductive and the cuts burdensome for the middle class, and Reid, D-Nev., has promised not to bring it up for consideration in the Senate.


"'Plan B' ... is a multi-day exercise in futility at a time when we do not have the luxury of exercises in futility," said White House spokesman Jay Carney Thursday.


Democrats complained that the posturing on "plan B" distracted the focus from a broader bargain on taxes, spending, entitlement reforms and other measures that had begun coming into focus earlier this week.


Reid said the Senate would break for the Christmas holiday but return to Washington one week from Thursday. President Obama will not join his family in Hawaii on Friday as planned if the "cliff" is not resolved, an administration official said.


"If you look at Speaker Boehner's proposal and you look at my proposal, they're actually pretty close," Obama said Wednesday, appealing for a big "fair deal."


"It is a deal that can get done," he said. "But it cannot be done if every side wants 100 percent. And part of what voters were looking for is some compromise up here."






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Apple "pinch-to-zoom" patent deemed invalid






SAN FRANCISCO: A filing in a high-stakes legal battle between Samsung and Apple revealed that a "pinch-to-zoom" patent central to the case has been deemed invalid.

The patent was a centerpiece of a trial that ended in August with a jury ordering Samsung to pay Apple $1.05 billion in damages for illegally copying iPhone and iPad features for its flagship Galaxy S smartphones.

Samsung provided US District Judge Lucy Koh a copy of a US Patent and Trademark Office preliminary determination that, upon review, the Apple pinch-to-zoom technology wasn't original enough to merit a patent.

Samsung hoped the filing would bolster its argument for a new trial or to have the damages award slashed.

Since the verdict, US patent officials tentatively invalidated an Apple patent on technology that gives a "rubber-band" springing effect when a finger tugs at the edge of a touch-screen smartphone. That patent was also at issue at the trial.

Koh on Monday denied Apple's request to ban a set of Samsung smartphones from the US market based on the jury's finding that the South Korean firm was guilty of infringing on six of the Cupertino, California-company's patents.

Even though Apple was victorious in the patent case, the iPhone and iPad maker failed to prove that the technology at issue was the driving factor in people's buying decisions, Koh reasoned in the ruling.

Samsung -- the world's top mobile and smartphone maker -- has appealed the verdict.

- AFP/al



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BJP leading in Gujarat, Himachal

AHMEDABAD/SHIMLA: The ruling BJP was leading in both Gujarat and Himachal Pradesh over Congress in the assembly elections for which the counting of votes began today.

TV channels put BJP well ahead of the Congress in both the states. One channel placed the BJP ahead in 57 constituencies against Congress' 34 while another gave the figure of 56 and 28 respectively. Yet others projected BJP as being ahead in 46 and Congress 23 and 48 and 23 respectively.

The Gujarat Parivartan Party (GPP) headed by former chief minister Keshubhai Patel was not doing well leading in only three seats.

The Gujarat Assembly has 182 seats. The BJP has 117 in the outgoing assembly against Congress' 53.

In Himachal Pradesh, three TV channels showed BJP ahead in 12 constituencies and Congress in six. One of the channels showed BJP ahead in 14 and Congress six.

Himachal has a 68-member Assembly in which BJP had won 43 seats in the 2003 elections against Congress' 16.

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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."








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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."



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Civilian analysts gained Petraeus’s ear while he was commander in Afghanistan



Their compensation from the U.S. government for their efforts, which often involved 18-hour workdays, seven days a week and dangerous battlefield visits?

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Strong turnout for South Korea's presidential election






SEOUL: South Koreans cast their votes Wednesday in a tight and potentially historic presidential election that could result in Asia's fourth-largest economy selecting its first female leader.

The ballot is a straight fight between Park Geun-Hye, the conservative daughter of assassinated dictator Park Chung-Hee, and her liberal rival Moon Jae-In, the son of North Korean refugees.

Opinion polls indicate the result could go either way.

The eventual occupant of the presidential Blue House will have to deal with a belligerent North Korea, a slowing economy and soaring welfare costs in one of the world's most rapidly ageing societies.

Park, 60, was looking to make history by becoming the first female president of a still male-dominated nation, and the first to be related to a former leader.

Her father remains one of modern Korea's most polarising figures -- admired for dragging the country out of poverty and reviled for his ruthless suppression of dissent during 18 years of military rule.

He was shot dead by his spy chief in 1979. Park's mother had been killed five years earlier by a pro-North Korea gunman aiming for her father.

Moon, who was chief of staff to the late left-wing president Roh Moo-Hyun, is a former human rights lawyer who was once jailed for protesting against the Park Chung-Hee regime.

Polling booths opened at 6:00am (2100 GMT Tuesday) on a bright, chilly winter's morning, with the temperature hovering around -10 Celsius (14 Fahrenheit).

Initial turnout among the 40 million-plus registered voters was strong, with 35 percent having cast their votes by midday -- a sharp increase on the 2007 election.

"It's freezing cold, but I plead with the people to come out and vote to open a new era for this country," Park, wrapped up in a long coat and red scarf, said as she cast her ballot in Seoul.

After locking in the support of their respective conservative and liberal bases, the two candidates put a lot of campaign effort into wooing crucial centrist voters, resulting in significant policy overlap.

Both have talked of "economic democratisation" -- a campaign buzzword about reducing the social disparities caused by rapid economic growth -- and promised to create new jobs and increase welfare spending.

Moon has been more aggressive than Park in his proposals for reining in the power of the giant family-run conglomerates, or "chaebol" that dominate the economy.

"This is the only way for the people to change the world," Moon said as he voted in the southern city of Busan.

"This election is about our livelihoods, economic democracy, welfare and peace on the Korean peninsula," he added.

While both have signalled a desire for greater engagement with Pyongyang, Park's approach is far more cautious than Moon's promise to resume aid without preconditions and seek an early summit with North Korean leader Kim Jong-Un.

Although North Korea has not been a major campaign issue, its long-range rocket launch last week -- seen by critics as a disguised ballistic missile test -- was a reminder of the unpredictable threat from across the border.

The never-married Park has promised a strong, parental style of leadership that would steer the country through the challenges of global economic troubles.

"Like a mother who dedicates her life to her family, I will become the president who takes care of the lives of each one of you," Park said in her last televised news conference on Tuesday.

A female president would be a big change for a country that the World Economic Forum recently ranked 108th out of 135 countries in terms of gender equality -- one place below the United Arab Emirates and just above Kuwait.

Older Koreans, who generally favour Park, are seen as more dependable voters and Moon's camp has pushed hard to ensure the younger demographic that make up his support base cast their ballots.

One early voter, Kim Su-Eun, 29, said she had opted for the ruling party candidate.

"I think Moon's election promises are too radical while Park says she will carry out reform step by step. That's why I voted for her", she told AFP.

- AFP/al



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Funds crunch hits war on malaria

NEW DELHI: The amount of funds available for malaria prevention and control globally is less than half what is needed, the World Health Organization (WHO) has said in a report. While it is estimated that $5.1 billion is needed every year between 2011 and 2020 to achieve universal access to malaria interventions, only $2.3 billion was available in 2011. The WHO has blamed this on a slowing down in the efforts to reverse the epidemic.

This was stated in the World Malaria Report released on Monday, which summarised information from 104 malaria-endemic countries, including India. International funding for malaria control has been steadily rising, going up from less than $100 million in 2000 to $1.71 billion in 2010. National government funding for malaria programmes has also been increasing in recent years, touching an estimated $625 million in 2011. Yet the funds are far from adequate as malaria hits the poorest countries with higher proportions of their population living in poverty (less than $1.25 per person per day) have higher mortality rates from malaria.

Projections of both domestic and international resources available between 2013 and 2015 indicate that total funding for malaria control will remain at less than US$ 2.7 billion, substantially below the amount required.

The African continent accounts for the highest incidence of malaria with 219 million cases and 90% of all malarial deaths in the world. In the Southeast Asia region, India has the highest incidence of malaria (24 million cases) followed by Indonesia and Myanmar. According to the latest WHO estimates, worldwide there were about 219 million cases of malaria in 2010 and an estimated 660,000 deaths.

Together, the Democratic Republic of the Congo and Nigeria are estimated to account for over 40% of all malaria deaths globally. Similarly, the Democratic Republic of the Congo, India and Nigeria account for 40% of malaria cases.

The world report claims that 50 countries are on track to reduce their malaria case incidence rates by 75%, in line with World Health Assembly and Roll Back Malaria targets for 2015. However, these 50 countries account for just 3% (7 million) of the total estimated malaria cases. Moreover, malaria surveillance systems detect only around 10% of the estimated global number of cases, with case detection being lowest in the countries with the highest burden of malaria. In the African and Western Pacific Regions, the main constraint is the small proportion of patients attending public facilities who receive a diagnostic test for malaria.

In the Southeast Asia Region, the most important issue is the high proportion of patients who seek treatment in the private sector, as is happening in India where the private sector is not part of the health reporting system. With such constraints, most of the WHO figures are based on estimates and modelling.

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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."


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