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 Says He Is 'Ready and Willing' to Get Deal

President Barack Obama says he is "ready and willing" to get a big package done to deal with the "fiscal cliff" and says there's no reason not to protect middle-class Americans from tax increases.

Mandel Ngan/AFP/Getty Images

Fiscal Cliff: Boehner Doesn't Have Votes for Plan B Watch Video

Next Steps for Fiscal Cliff? 'God Only Knows,' Says Boehner Watch Video

'Fiscal Cliff' Negotiations: Boehner's Plan B Watch Video

Obama says he spoke Friday with House Speaker John Boehner and met with Senate Majority Leader Harry Reid. He says Congress should pass a plan to extend tax breaks for the middle class and extend unemployment benefits.

Obama says no one can get 100 percent of what they want and there are "real consequences" to how they deal with the across-the-board tax increases and steep spending cuts scheduled to kick in Jan. 1. Economists fear the combination could deliver a blow to the U.S. economy.

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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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Dollar steady as investors await fiscal cliff sign

WASHINGTON: The dollar lost a little bit of ground against the euro and was largely flat against the yen in quiet trade on Thursday as investors awaited a clear sign from US "fiscal cliff" talks.

The euro stood at $1.3241 towards 2200 GMT, up from $1.3226 late Wednesday. It also rose against the Japanese yen, reaching 111.72 yen compared to 111.59 yen a day earlier.

The dollar held steady against the yen, after reaching its highest level against the currency since April 2011 on Wednesday.

On Thursday, the greenback edged lower to 84.38 yen towards 2200 GMT from 84.39 yen a day earlier.

Japan's central bank unveiled more huge monetary easing earlier on Thursday in the wake of a weekend election won by the Liberal Democratic Party.

With an end-of-year deadline approaching, the markets are watching whether Washington can avert the so-called fiscal cliff, a mix of tax hikes and spending cuts set to take effect in January that could plunge the world's biggest economy back into recession.

Analysts said remarks by top Republican John Boehner had sparked slight optimism, increasing investors' appetite for risk, for the euro among other things.

Talks between President Barack Obama and Boehner on averting the "fiscal cliff" have stalled amid accusations of political grandstanding on both sides.

In other currencies, the dollar slipped to 0.9115 Swiss francs, while the pound rose to $1.6280.

- AFP/fa

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Instagram rolls back terms of service after ownership dustup

In the wake of user backlash over image ownership, Instagram announced today that it would revert its terms of service back to the version that has been in place since the service launched two years ago.

The Facebook-owned app ignited a storm of protest with the announcement earlier this week that it was claiming perpetual rights to sell users' photographs without notifying or compensating the photographer. Under the new policy, Facebook claimed the perpetual right to license all public Instagram photos to companies or any other organization, including for advertising purposes, effectively transforming the Web site into the world's largest stock photo agency.

Since the publication of the updates, "it became clear that we failed to fulfill what I consider one of our most important responsibilities -- to communicate our intentions clearly," Instagram founder and CEO Kevin Systrom wrote in a company blog post. "I am sorry for that, and I am focused on making it right."

"Going forward, rather than obtain permission from you to introduce possible advertising products we have not yet developed, we are going to take the time to complete our plans, and then come back to our users and explain how we would like for our advertising business to work," he said.

Systrom also denied that the company ever intended to sell users' images.

"I want to be really clear: Instagram has no intention of selling your photos, and we never did. We don't own your photos -- you do," he said.

The changes come a day after the app maker apologized to its users, saying it would "remove" language from its legal terms that would have let it sell users' photos or use them in advertisements. Systrom said it's "our mistake that this language is confusing" and that the company is "working on updated language."

more to come ...

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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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Obama, Boehner Not Far Apart on 'Cliff'? Not Really

Dec 20, 2012 5:09pm

Carolyn Kaster/AP Photo; Pablo Martinez Monsivais/AP Photo

There are some in Washington and around Capitol Hill who keep saying that House Speaker John Boehner and President Obama really aren’t that far apart on the “fiscal cliff” and there will be a deal despite Boehner’s proposal to hold a vote on his “Plan B.”

Let’s deconstruct the two parts of that thinking.

Boehner and Obama really aren’t that far apart?

Not really.

The differences are more significant than just tax rates.  Republicans say the Democratic offer is really $800 billion in spending cuts and $1.3 trillion in tax increases.  That is because the inflation adjustment applies to tax rates* as well as Social Security — resulting in less than $100 billion in added tax revenues.

Democrats count that as a spending cut.  Republicans say that is a tax hike.  So the real difference, from their perspective, is $450 billion.  The $400,000 vs. $1 million threshold for tax rates hikes is just one part of this.  Republicans want more spending cuts and fewer tax increases.

Related: Read More About the Fiscal Cliff

Obama and Senate Democrats are fond of saying they are this close (fingers close together).  They say Boehner should just accept the president’s offer.

But, as I asked Senate Majority Leader Harry Reid, D-Nev., earlier today: If you are this close why not just accept Boehner’s offer?  He dodged, saying that Boehner’s offer wasn’t really an offer and likened him to Lucy and the football — you’ll recall the routine in which the “Peanuts” character would pull away the ball at the last second and leave Charlie Brown kicking at nothing but air.

Both sides like to talk about Lucy and the football, but that is another story.  Will there be a deal?

They should be able to do a deal.  I know where the deal should be.  So do you.  But, really, they aren’t quite as close as the nifty charts like this one from the Washington Post suggest. And this is about much more than the $400,000 tax-rate threshold.

*By lowering the government’s calculation for inflation, the income level for the top rates would rise at a slower rate, putting more and more people into the top rates.

SHOWS: World News

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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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US dollar strengthens against yen in nervous trade

NEW YORK: The US dollar strengthened against the yen and slipped slightly against the euro on Wednesday in nervous trade as talks over how to avert the US 'fiscal cliff' dragged on.

The dollar rose against the yen, reaching 84.39 yen towards 2300 GMT, down slightly from 84.62 earlier in the day - its highest level in 20 months. Late Tuesday, it finished at 84.19.

The euro stood at $1.3226 towards 2300 GMT, compared to $1.3225 late Tuesday. Earlier, it had reached its highest level in eight and a half months at $1.3308.

Boris Schlossberg of BK Asset Management said investors were disappointed by the lack of movement in protracted talks between US President Barack Obama and Republicans on a long-term deficit deal to avert the "fiscal cliff" crisis of sweeping tax hikes and spending cuts.

The euro was up against the Japanese currency at 111.59 yen, after reaching its highest level in 16 months - 112.50 yen - in earlier trade. Late Tuesday, it stood at 111.35 yen.

Japan's incoming prime minister Shinzo Abe, whose Liberal Democratic Party swept to an electoral victory in elections on Sunday, has vowed to step up pressure on the central bank for more aggressive action to boost the economy.

The hawkish LDP head wants the bank to set a two percent inflation target as part of a goal to drag Japan out of the deflationary spiral that has haunted it for years.

In other currencies, the dollar rose to 0.9133 Swiss francs, while the pound slipped to $1.6245.

- AFP/de

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Google sells Motorola Home set-top biz to Arris for $2.3B

Google has sold the Motorola Home set-top business -- which it inherited as part of its $12.5 billion acquisition of Motorola Mobility earlier this year -- to the Arris Group, for $2.35 billion in cash and stock.

Under the terms of the deal, Google will receive $2.05 billion in cash and $300 million in newly issued stock, giving it a 15.7 percent ownership stake in Arris upon the deal's closure. Arris will also gain access to a collection of Motorola Mobility patents.

The broadband technology provider is expected to use the acquisition to enhance the networking equipment it offers to cable providers.

"The industry faces its biggest technology transformation, and together Arris and Motorola will be able to accelerate related innovations such as the introduction of the IP Connected Home environments that service providers need and that their consumers crave," Dennis Woodside, CEO of Motorola Mobility, said in a statement.

The Web giant has apparently been shopping the business for several months and had reportedly hired Barclays to fetch a price of $2 billion for the unit, which makes set-top boxes used by cable providers to deliver video -- a business that offers solid cash but little growth.

While Motorola's
Android smartphones fit into Google's strategy, the set-top box business wasn't an area in which the company was eager to invest too many resources, especially since it didn't appear to offer much to the Web giant's Google TV initiative.

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