Today on New Scientist: 21 December 2012

Cadaver stem cells offer new hope of life after death

Stem cells can be extracted from bone marrow five days after death to be used in life-saving treatments

Apple's patents under fire at US patent office

The tech firm is skating on thin ice with some of the patents that won it a $1 billion settlement against Samsung

Himalayan dam-building threatens endemic species

The world's highest mountains look set to become home to a huge number of dams - good news for clean energy but bad news for biodiversity

Astrophile: Black hole exposed as a dwarf in disguise

A white dwarf star caught mimicking a black hole's X-ray flashes may be the first in a new class of binary star systems

Blind juggling robot keeps a ball in the air for hours

The robot, which has no visual sensors, can juggle a ball flawlessly by analysing its trajectory

Studio sessions show how Bengalese finch stays in tune

This songbird doesn't need technological aids to stay in tune - and it's smart enough to not worry when it hears notes that are too far off to be true

Giant tooth hints at truly monumental dinosaur

A lone tooth found in Argentina may have belonged to a dinosaur even larger than those we know of, but what to call it?

Avian flu virus learns to fly without wings

A strain of bird flu that hit the Netherlands in 2003 travelled by air, a hitherto suspected by unproven route of transmission

Feedback: Are wind turbines really fans?

A tale of "disease-spreading" wind farms, the trouble with quantifying "don't know", the death of parody in the UK, and more

The link between devaluing animals and discrimination

Our feelings about other animals have important consequences for how we treat humans, say prejudice researchers Gordon Hodson and Kimberly Costello

Best videos of 2012: First motion MRI of unborn twins

Watch twins fight for space in the womb, as we reach number 6 in our countdown of the top videos of the year

2012 Flash Fiction winner: Sleep by Richard Clarke

Congratulations to Richard Clarke, who won the 2012 New Scientist Flash Fiction competition with a clever work of satire

Urban Byzantine monks gave in to temptation

They were supposed to live on an ascetic diet of mainly bread and water, but the monks in 6th-century Jerusalem were tucking into animal products

The pregnant promise of fetal medicine

As prenatal diagnosis and treatment advance, we are entering difficult ethical territory

2013 Smart Guide: Searching for human origins in Asia

Africa is where humanity began, where we took our first steps, but those interested in the latest cool stuff on our origins should now look to Asia instead

The end of the world is an opportunity, not a threat

Don't waste time bemoaning the demise of the old order; get on with building the new one

Victorian counting device gets speedy quantum makeover

A photon-based version of a 19th-century mechanical device could bring quantum computers a step closer

Did learning to fly give bats super-immunity?

When bats first took to the air, something changed in their DNA which may have triggered their incredible immunity to viruses

Van-sized space rock is a cosmic oddball

Fragments from a meteor that exploded over California in April are unusually low in amino acids, putting a twist on one theory of how life on Earth began

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Squash: World No. 1 Nicol David extends haul of World Open titles

GRAND CAYMAN, Cayman Islands: Nicol David extended her record of World Open titles to seven from eight finals on Friday with a balanced performance and great patience to beat English third seed Laura Massaro.

The Malaysian heroine's 11-6 11-8 11-6 victory silenced critics who had suggested younger rivals were closing the gap on the 29-year-old champion.

Massaro forced many long rallies and even led 7-5 in the second game, but David responded well to the important moments which followed.

She mixed containment with well-timed drops and lightning-quick changes of direction that prevented her opponent from getting a crucial foothold in the match.

The outcome was that David only dropped one game throughout the entire tournament, but she had to focus harder and for longer in the final than in any of her four other encounters.

Her relief and joy at surviving the perpetual pressure of expectations yet again was smilingly obvious.

She held her head in both hands, then placed her hands high on the court, and finally caressed the ball affectionately against a wall before allowing herself to accept that no more was required of her racket.

Then her words reflected the frequent struggle between doubt and self-confidence.

"I can't believe it," she said. "I just can't believe it.

"I am just so pleased with my match. Laura pushed me every point. There was no point where I could let up because she was just on it every point. She played a very good match."

David knew the danger well as Massaro is one of the few players to have beaten her twice. However, she did so last year and, although the challenger has improved further since then, the champion at her best has too, perhaps just as much.

Two of the most crucial moments came when David got back to 7-7 in the pivotal middle game and then nosed ahead to 8-7 with a disputed point.

The levelling rally saw brilliantly nimble retrieves from David, plus some patient backhand wall straight driving with a tight little backhand drop to finish it.

That was followed in the next rally by a marginally mistimed backhand drive by Massaro, which caused the ball to come away from the wall and resulted in her slightly impeding David.

A penalty stroke was awarded, Massaro's video review appeal failing to get the decision overturned.

David pushed hard to capitalise, offered a rare fist pump when she broke through to a two-game lead, and was quickly five points up in the third and motoring away.

"I am a little bit disappointed with that," said Massaro, who had saved a match point in a long and hard semi-final with Raneem El Weleily, the second-seeded Egyptian, and may have paid a price in the third game of the final.

"It was just a few points here and there and that's all the difference," she said. "The middle of the games were so crucial and that's what I have to work on.

"It's still pretty rare that she is beaten. We are still training hard and improving and she's rising to the challenge."

To do that well as she moves through her 30th year, David may need to select peaks more carefully for the tournaments she really wants to win.

But at her best, she is still too fine an athlete and too steady a rallyer for everyone, even during her moments of doubt. Her high profile among the all-time greats is likely to rise yet further.

- AFP/al

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Why does my external hard drive only show 2.2TB?

External hard drives are exceptionally useful for expanding storage capabilities for both backups and data management. While external hard drives are often sold in preconfigured packages by manufacturers, another popular option is to purchase an external hard-drive enclosure and then use any drive of your choice in it. This is beneficial because as your demands for storage increase, you can replace the enclosure's drive with a larger one.

These days, the availability of hard drives with 4TB of storage are enticing for people to swap into their existing enclosures; however, when doing so they may find that the system will only recognize 2.2TB of the drive, regardless of how they partition or format the device.

While modern file-system formats such as HFS+, NTFS, and ExFAT ought to handle volume sizes of between hundreds of gigabytes to zettabytes, and though operating systems like OS X have increased the maximum volume size from 2TB to 8EB (exabytes) over the years, there are hardware limitations that may limit the size of the volume that can be used. If you are using an older drive enclosure for your large hard drive, then the controllers on it may not be capable of handling over 2.2TB, regardless of the software environment being used around it.

This problem happens because of the use of LBA (logical block addressing) in modern hard-drive controllers coupled with a hardware-based limit of how many blocks can be included in the LBA scheme. Early LBA controllers used 32-bit (or lower) addressing coupled with a maximum supported block size of 512 bytes. This means they support up to 2^32 or 4,294,967,296 blocks for a device, and with each block being 512 bytes, this translates to a maximum of 2,199,023,255,552 bytes, or 2.199TB.

Unfortunately in many cases these limits are hard-coded in enclosure's firmware, so even though modern drives use 4,096-byte sectors, the system will still only address these sectors as 512 bytes in size, resulting in both a waste of space and degraded performance.

The only way around this problem is to replace your drive enclosure with a new one that has proper support for both 48-bit (or greater) LBA and 4,096-byte sectors in hard drives. Luckily most enclosures on the market today do support this, so if you run into this problem, you should be up and running in no time.

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Pictures: Fungi Get Into the Holiday Spirit

Photograph courtesy Stephanie Mounaud, J. Craig Venter Institute

Mounaud combined different fungi to create a Santa hat and spell out a holiday message.

Different fungal grow at different rates, so Mounaud's artwork rarely lasts for long. There's only a short window of time when they actually look like what they're suppose to.

"You do have to keep that in perspective when you're making these creations," she said.

For example, the A. flavus fungi that she used to write this message from Santa grows very quickly. "The next day, after looking at this plate, it didn't say 'Ho Ho Ho.' It said 'blah blah blah,'" Mounaud said.

The message also eventually turned green, which was the color she was initially after. "It was a really nice green, which is what I was hoping for. But yellow will do," she said.

The hat was particularly challenging. The fungus used to create it "was troubling because at different temperatures it grows differently. The pigment in this one forms at room temperature but this type of growth needed higher temperatures," Mounaud said.

Not all fungus will grow nicely together. For example, in the hat, "N. fischeri [the brim and ball] did not want to play nice with the P. marneffei [red part of hat] ... so they remained slightly separated."

Published December 21, 2012

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Obama Still an 'Optimist' on Cliff Deal

Mandel Ngan/AFP/Getty Images

WASHINGTON D.C. – Ten days remain before the mandatory spending cuts and tax increases known as the “fiscal cliff” take effect, but President Obama said he is still a “hopeless optimist” that a federal budget deal can be reached before the year-end deadline that economists agree might plunge the country back into recession.

“Even though Democrats and Republicans are arguing about whether those rates should go up for the wealthiest individuals, all of us – every single one of us -agrees that tax rates shouldn’t go up for the other 98 percent of Americans, which includes 97 percent of small businesses,” he said.

He added that there was “no reason” not to move forward on that aspect, and that it was “within our capacity” to resolve.

The question of whether to raise taxes on incomes over $250,000 remains at an impasse, but is only one element of nuanced legislative wrangling that has left the parties at odds.

For ABC News’ breakdown of the rhetoric versus the reality, click here.

At the White House news conference this evening, the president confirmed he had spoken today to Senate Majority Leader Harry Reid, D-Nev., and House Speaker John Boehner, R-Ohio, although no details of the conversations were disclosed.

The talks came the same day Speaker Boehner admitted “God only knows” the solution to the gridlock, and a day after mounting pressure from within his own Republican Party forced him to pull his alternative proposal from a prospective House vote. That proposal, ”Plan B,” called for extending current tax rates for Americans making up to $1 million a year, a far wealthier threshold than Democrats have advocated.

Boehner acknowledged that even the conservative-leaning “Plan B” did not have the support necessary to pass in the Republican-dominated House, leaving a resolution to the fiscal cliff in doubt.

“In the next few days, I’ve asked leaders of Congress to work towards a package that prevents a tax hike on middle-class Americans, protects unemployment insurance for 2 million Americans, and lays the groundwork for further work on both growth and deficit reduction,” Obama said. ”That’s an achievable goal.  That can get done in 10 days.”

Complicating matters: The halls of Congress are silent tonight. The House of Representatives began its holiday recess Thursday and Senate followed this evening.

Meanwhile, the president has his own vacation to contend with. Tonight, he was embarking for Hawaii and what is typically several weeks of Christmas vacation.

However, during the press conference the president said he would see his congressional colleagues “next week” to continue negotiations, leaving uncertain how long Obama plans to remain in the Aloha State.

The president said he hoped the time off would give leaders “some perspective.”

“Everybody can cool off; everybody can drink some eggnog, have some Christmas cookies, sing some Christmas carols, enjoy the company of loved ones,” he said. “And then I’d ask every member of Congress, while they’re back home, to think about that.  Think about the obligations we have to the people who sent us here.

“This is not simply a contest between parties in terms of who looks good and who doesn’t,” he added later. “There are real-world consequences to what we do here.”

Obama concluded by reiterating that neither side could walk away with “100 percent” of its demands, and that it negotiations couldn’t remain “a contest between parties in terms of who looks good and who doesn’t.”

Boehner’s office reacted quickly to the remarks, continuing recent Republican statements that presidential leadership was at fault for the ongoing gridlock.

“Though the president has failed to offer any solution that passes the test of balance, we remain hopeful he is finally ready to get serious about averting the fiscal cliff,” Boehner said. “The House has already acted to stop all of the looming tax hikes and replace the automatic defense cuts. It is time for the Democratic-run Senate to act, and that is what the speaker told the president tonight.”

The speaker’s office said Boehner “will return to Washington following the holiday, ready to find a solution that can pass both houses of Congress.”

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Van-sized space rock is a cosmic oddball

The shattered remains of a high-profile space rock are oddly low in organic materials, the raw ingredients for life. The discovery adds a slight wrinkle to the theory that early Earth was seeded with organics by meteorite impacts.

In April a van-sized meteor was seen streaking over northern California and Nevada in broad daylight. The fireball exploded with a sonic boom and sprayed the region with fragments. Videos, photographs and weather radar data allowed the meteor's trajectory to be reconstructed, and teams quickly mobilised to search for pieces in the foothills of the Sierra Nevada in northern California.

Researchers readily identified the meteorites as rare CM chondrites, thought to be one of the oldest types of rock in the universe. "Because the meteorites were discovered so freshly, for the first time we had a chance to study this type of meteorite in a pristine form," says Peter Jenniskens of the SETI Institute in Mountain View, California, who led the search effort and the subsequent study of the space rocks.

Jenniskens personally found a fragment in a parking lot, where it remained relatively free of soil contaminants. "That's the best you could hope for, other than landing in a freezer," says Daniel Glavin of NASA's Goddard Space Flight Center in Greenbelt, Maryland.

Battered past

CM chondrites make up only about 1 per cent of known meteorites. Most of them contain plenty of organic materials, including amino acids, the building blocks of life on Earth.

Jenniskens and colleagues found that the California fragments also have amino acids, including some not found naturally on Earth. But in three rocks collected before a heavy rainstorm, which bathed the other pieces in earthly contaminants, organics are less abundant by a factor of 1000 than in previously studied CM chondrites.

These three rocks could not have lost organics due to space "weathering": analysis of the meteorites' exposure to cosmic rays suggests the original meteor was flying through space for only about 50,000 years before hitting Earth.

Based on its trajectory and its relatively short flight time, Jenniskens thinks the meteor can be traced back to a family of asteroids dominated by 495 Eulalia, a group known as a possible source of CM chondrites. It is probably a piece that broke off during an impact, revealing the relatively pristine material inside.

So what happened to its organics? Jenniskens' team found that the meteorites are breccia – smaller rocks cemented together – which suggests that the asteroid from which they came took a series of beatings. Those impacts, or possibly other processes inside the asteroid, could have heated it enough to destroy most organic material.

Limited delivery

The result might have implications for the organics delivery theory, says Bill Bottke of the Southwest Research Institute in Boulder, Colorado.

"It shows that not all asteroids can deliver sufficient quantities. One of the disappointments is that, from a prebiotic organic chemistry perspective, it was very limited," says Bottke. "But this is an unusual case. Most [CM chondrites] are loaded with organic compounds."

Still, studying the space rocks will help us prepare future missions to asteroids such as OSIRIS-Rex, scheduled to take off for asteroid 1999 RQ36 in 2016 and bring a sample back in 2023.

"In some ways, we've had a sample, a very fresh one, come to us," says Bottke. "This is a test bed for the techniques we'll use in that mission."

Journal reference: Science, DOI: 10.1126/science.1227163

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Ex-Beatle's widow lauds Ravi Shankar at US memorial

ENCINITAS, California: Former Beatle George Harrison's widow Olivia joined hundreds of fans and family of Ravi Shankar on Thursday at an open-air memorial to the Indian sitar legend near his California home.

Anoushka Shankar, daughter of the late musician who died last week near San Diego, and her step-sister Grammy-winning singer Norah Jones also paid their last respects at the service in a palm tree-lined meditation centre.

Tributes were read out from fellow musicians and artists who had been inspired by Shankar, labelled "The Godfather of World Music" by the Beatles and compared to Mozart by violin maestro Yehudi Menuhin.

Harrison, whose late husband learned sitar from Shankar and collaborated with him notably on the ground-breaking Concert for Bangladesh in 1971, said the former Beatle had learned so much from their friendship.

"They were like father and son as well as brothers... they made each other laugh as if they shared a secret. And I'm sure they did," said the 64-year-old, whose husband died of cancer in 2001.

Shankar "laid the stepping stones from West to East, that led George to new concepts, alternative philosophies and completely transformed his musical sensibilities," she said.

"They exchanged ideas and melodies until their minds and hearts, East and West, were entwined, like a double helix," she added in Encinitas, where Shankar had a home.

Shankar's 31-year-old daughter Anoushka -- also a sitar player, and just nominated for a Grammy -- told the audience that her father would have approved of the memorial's venue, the Self-Realization Fellowship spiritual centre.

"My father loved spending time here so much, so it feels so right for us to be here celebrating his journey," she said, before tributes were read out from singer Peter Gabriel and film director Martin Scorsese.

Gabriel said: "Ravi Shankar opened the door to non-Western music for millions of people around the world."

"His music has such power, seeming ancient and immediate, impassioned and meditative, full of sorrow and joy. He was a true master," said Scorsese, "From the first time I met him ... his brilliant sitar playing has mesmerised me."

Shankar died last Tuesday at the age of 92, after failing to recover from surgery at a hospital in La Jolla, near San Diego. His family was at his bedside.

Private memorial services were announced both in the United States and India, where Shankar also had a home.

Jazzy soul singer Jones, Shankar's daughter from an affair with a US concert producer, was dressed in black and kept a low profile at Thursday's event in Encinitas, up the coast from San Diego.

His widow Sukanya was also at the California memorial, which started with prayers chanted by M.N. Nandakumara of the Bharatiya Vidya Bhavan institute for Indian art and culture in London.

Nandakumara said that Shankar's music "brought people of various countries, communities together to his soul-stirring music, which was matchless.

"I do not know another musician who has understood the Eastern and Western music the way (Shankar) understood it, and interpreted it in such a way that people around the world were mesmerized by it," he said.

As well as Indian family and friends, Thursday's event -- at which speakers were flanked on stage by photos of Shankar at various stages of his life -- was attended by locals and other fans and followers.

"He's local, he's part of the community here," said Eddy Jimenez, a musician and trumpet player from Encinitas, comparing Shankar's influence and music to that of Harrison's fellow Beatle John Lennon.

"He's a bridge between humanity, really, not just East and West. I'm just here to pay my respects," the 61-year-old told AFP.

-AFP/fl

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Facebook begins rolling out new privacy tools

Facebook began rolling out new tools this evening that it touts as helping users better manage who can see what on the social network.

Facebook is not changing what settings users can set, except for the option to block profile searches within the social network. The network has already begun phasing out this feature and soon it will be removed from everyone's profiles.

Facebook says these new changes are designed to give users more flexibility with their privacy.

"We believe that the better you understand who can see the things you share, the better your experience on Facebook can be," Sam Lessin, a director of product for Facebook, said in a statement.

As detailed last week, the new tools include Privacy Shortcuts, an updated Activity Log, and a Request and Removal tool for managing tagged photos. It also added an education feature intended to explain key concepts about sharing privacy.

A privacy setting shortcuts menu has been added to the tool bar at the top of page, letting users pick what privacy settings they want to change base on questions rather than by setting: Who can see my stuff? Who can contact me? How do I stop someone from bothering me?

The new Activity Log -- where users can review and delete their activity -- includes new tools for deleting unwanted content. In addition to a "Request and Removal" tool, users can go to the "Photos of You" tab and select multiple pictures for untagging or removal.

Facebook also added a tutorial to educate users about their privacy actions. For example, when a user hides a post from a Timeline, a message will pop up that explains that while the post is hidden on the Timeline, it will still show in other places, such as their friends' news feeds and in searches.

CNET's Donna Tam contributed to this report.

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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.

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

Outgoing Sen. Joe Lieberman Criticizes Colleagues for Putting Party Above Country Watch Video

President Obama Promises Action to Reduce Gun Violence Watch Video

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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