Arctic sunshine cranks up threat from greenhouse gases









































IT'S a solar double whammy. Not only does sunlight melt Arctic ice, but it also speeds up the conversion of frozen organic matter into carbon dioxide.











The amount of carbon in dead vegetation preserved in the far northern permafrost is estimated to be twice what the atmosphere holds as CO2. Global warming could allow this plant matter to decompose, releasing either CO2 or methane – both greenhouse gases. The extent of the risk remains uncertain because the release mechanisms are not clear.













Rose Cory at the University of North Carolina at Chapel Hill and her colleagues analysed water from ponds forming on melting permafrost at 27 sites across the Arctic. They found that the amount of CO2 released was 40 per cent higher when the water was exposed to ultraviolet light than when kept dark. This is because UV light, a component of sunlight, raises the respiration rate of soil bacteria and fungi, amplifying the amount of organic matter they break down and the amount of CO2 released.












The thawing Arctic is emerging as a potentially major source of positive feedback that could accelerate global warming beyond existing projections. "Our task now is to quantify how fast this previously frozen carbon may be converted to CO2, so that models can include the process," Cory says.












Journal reference: PNAS, DOI: 10.1073/pnas.1214104110.




















































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Anti-whaling group takes battle to top US court






WASHINGTON: The Sea Shepherd conservation group asked the US Supreme Court on Monday to lift an order forcing it to steer clear of Japan's whalers, who are seeking legal reprisals over harassment at sea.

Since 2002, Sea Shepherd has annually disrupted Japan's contested hunt in the Southern Ocean but a US court issued an injunction on December 17 for the activists to stay at least 500 yards away from the whaling vessels.

Environmental lawyer Robert F. Kennedy Jr., the son and namesake of the slain political icon, urged the United States to show support for the Sea Shepherd Conservation Society and its fugitive founder Paul Watson.

"It's a mission that only they are capable of accomplishing and that is absolutely vital to the enforcement of international agreements on the high seas which otherwise go unenforced," Kennedy told reporters.

The International Whaling Commission has designated a whale sanctuary in the Southern Ocean. Japan kills whales in the area through a loophole in a 1986 moratorium on commercial whaling that allows lethal research.

Kennedy called Japan's government-supported Institute of Cetacean Research, which runs the whaling program and sued Sea Shepherd, "a pirate organisation masquerading as a scientific research group."

In a filing to the Supreme Court on Friday, Sea Shepherd and Watson said that the lower court "acted rashly" and voiced concern over the order's "extraordinarily long reach" to areas outside US jurisdiction.

The document said that the injunction marked "a potentially existential threat" to Sea Shepherd as more than 80 per cent of its funding comes from donations, which "may slow to a trickle" without the anti-whaling campaign.

The US Court of Appeals for the Ninth Circuit cited safety concerns when it issued the injunction, effective until a decision on the case.

The Institute of Cetacean Research hit back and was believed to have asked the judge to find Sea Shepherd in contempt of court -- which would potentially lead to punishment.

Sea Shepherd released a letter from a lawyer representing the institute, which complained that MV Brigitte Bardot, a former ocean racer named after the French actress and animal rights activist, violated the 500-yard injunction on January 29.

The letter warned of legal action unless Sea Shepherd ordered the Brigitte Bardot to comply with the injunction or returned it to port.

The Oregon-based group contended that it was observing the injunction, saying that the Brigitte Bardot sails under an Australian flag and is operated by Sea Shepherd's Australian sister organisation.

Japan's institute is "just like a bully who is finally challenged and runs to his mommy," said Scott West, the director of intelligence and investigation for US Sea Shepherd.

Sea Shepherd boasted that it has prevented Japan from killing whales this season. Japan, which makes no secret that meat from whaling ends up on dinner plates, accuses Western nations of disrespecting its cultural traditions.

Gavin Carter, a US-based spokesman for the Institute of Cetacean Research, called Sea Shepherd's Supreme Court filing an "unusual approach."

Watson, a dual US and Canadian citizen, has kept his whereabouts unknown since July, when he jumped bail in Germany, where he was arrested on charges from Costa Rica related to a confrontation over shark finning.

- AFP/jc



Read More..

How we test: Monitors



CNET's monitor testing encompasses both the taking scientific measurements as well as making subjective judgements on quality.



(Credit:
Eric Franklin/CNET)


To evaluate a display's performance, CNET uses a variety of DisplayMate test screens in conjunction with diagnostic equipment, and our most important tool, the human eye. Each test screen we use is specifically designed to emphasize a particular area of performance, such as text readability, color accuracy, or screen uniformity.


Test bed
CNET Labs' monitor test bed consists of a 3.2GHz Core i7 960 CPU, 4GB of DDR3 RAM running at 533MHz, an ATI Radeon HD 6850-based graphics card, centered around the 32-bit version of
Windows 7. We test all monitors with Windows' Display Properties set to 32-bit color and use the display's native pixel resolution as specified by the manufacturer.

We are currently evaluating the possibility of upgrading our testbed, including a move to
Windows 8.


Calibration
Variables such as the light source, the viewing angle, and the system's graphics card can have a dramatic effect on a display's performance. To maintain consistent and ideal viewing conditions, all testing is performed in a controlled lighting environment using CinemaQuest Ideal-Lume lights, which help to preserve accurate color perception. Additionally, each display is adjusted to perform optimally, based on contrast setting recommendations from DisplayMate.


Brightness tests
CNET Labs tests luminance levels using the Minolta CA-210 LCD color analyzer. Because displays typically vary in brightness across the entire screen, we take brightness readings from different sections of the display as laid out in the VESA Brightness Uniformity Test screen found in the DisplayMate test suite. The brightness number that CNET publishes represents an average of the luminance readings taken at nine specific points on the screen.


Contrast ratio
To test a monitor's contrast ratio, we use the display's factory default contrast and brightness settings, under its default preset. Using the Minolta CA-210 LCD color analyzer, we measure the brightness of both the light and dark squares found on the DisplayMate ANSI Checkerboard Contrast screen. We divide the average luminance of the white squares by the average luminance of the dark squares to yield the display's contrast ratio.


DisplayMate tests
With guidance from DisplayMate Technologies, we created our own scripted selection of test screens in DisplayMate. These screens are designed to isolate common phenomena such as digital noise, streaking and ghosting, ringing and overshoot, and color-tracking errors.

We evaluate each display in four categories: sharpness, grayscale range, color quality, and image uniformity. We compile the product's performance scores from each category and distill them into a single performance rating: the CNET Labs DisplayMate test score.

Most of the screens in this test suite can be configured in a number of different ways, such as altering the background and foreground colors. Depending on the characteristics of an individual display, we might use several variations of these screens as well as additional DisplayMate screens not found in our custom script to conduct further testing. Check below for details on the actual tests we run.


Real-world testing
In addition to our suite of DisplayMate test screens, we also use a number of tests designed to mirror real-world use, such as Blu-ray movie playback and games. For our Blu-ray test, we use Panasonic DMP-BDT220 Blu-ray player with an "Avatar" Blu-ray disc. We use this movie to evaluate a monitor's ability to display dark detail in dark scenes as well as color quality. For color quality we look at the display's ability to reproduce bright, vivid, accurate colors, including bright whites and solid, deep blacks.

We use several games for games testing, including, but not limited to Dragon Age II, Starcraft 2, and Crysis 2. With games we evaluate vibrancy and color quality. To test streaking, we use DisplayMate's motion graphics tests where we closely watch a number of colored blocks as they move around the screen at various speeds. Each block leaves an impression of its image behind as it moves around. The longer the impression, the worse the streaking.
Page of text
These screens illustrate a display's ability to render text under a variety of conditions. We cycle through various text and background colors, view split screens with inverse text and background colors, and adjust the type and the size of a font.
Intensity and grayscale
Monitors often have trouble reproducing all of the levels of the grayscale (the range of grays between true black and true white). This screen helps to identify a display's ability to deliver seamless gradation across the full spectrum of grays, both horizontally and vertically across the screen.


Low saturation colors
When producing a bright white image, many monitors oversaturate the grayscale: the lightest grays of the scale are lost in the white background. Oversaturation can also lead to loss of color range; this screen is used to evaluate color reproduction at the brightest end of the scale, closest to white.


Extreme grayscale bars
As the title suggests, this screen has the dual function of evaluating the darkest and brightest areas of the grayscale. These outermost edges are the most difficult part of the scale for monitors to produce. We use this screen primarily for the dark end of the scale to check a monitor's ability to deliver a true black and still produce the darkest grays of the grayscale.


64-256 intensity color ramp
Similar to the grayscale tests, the color ramp illustrates a monitor's capacity to render gradations of primary colors smoothly, uniformly, and consistently. This screen is also used to check that the colors don't shift hue as the color levels increase or decrease.


Color tracking
A color-tracking error occurs when the intensity of red, green, and blue (RGB) do not adjust identically with signal-level changes. This lack of balance among the RGB channels affects color as well as grayscale, but it is most easily identified as a shift in color within shades of gray. We use this screen to look for grays that appear to be tinted with color.


256 intensity color ramp
Similar to the grayscale tests, the color ramp illustrates a monitor's capacity to render gradations of primary colors smoothly, uniformly, and consistently. This screen is also used to check that the colors don't shift hue as the color levels increase or decrease. This is a good screen to test for evidence of color banding.


Dark screen
Because this test screen is designed to appear uniformly black, it is useful for evaluating a monitor's black-level capabilities. Additionally, a dark screen is the easiest way to spot glare and reflection problems, both of which can have distracting effects when you're viewing an LCD.


Color scales
Similar to the intensity color ramp, the color-scales screen helps us evaluate the smooth gradation of colors, expanding the palette to 10 principal colors.


Streaking and ghosting
This screen helps us detect streaking and ghosting -- light or dark shadows that trail an image in areas where large changes in contrast are present. This should not be confused with the streaking that is often found in moving images. This test deals only with problems that arise when a display renders large, chunky graphic elements, such as bar graphs or tiled arrangements of open windows.


Screen uniformity
Perfectly uniform backlighting across a monitor's entire display surface is difficult to achieve. It is not uncommon for a monitor to have bright or dim patches or subtler variations in color intensity, which give the appearance of shading across the screen, or variable color intensity on the display. We use this screen to check for irregularities caused by backlighting issues or other screen-uniformity factors, such as variations or reflections inside the glass panel.

Read More..

Kumbh Mela: Pictures From the Hindu Holy Festival








































































































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Great Energy Challenge Blog













































































































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Benedict's Legacy Marred by Sex Abuse Scandal












When Pope Benedict XVI resigns at the end of this month, he leaves behind a Church grappling with a global fallout from sex abuse and a personal legacy marred by allegations that he was instrumental in covering up that abuse.


As the sex abuse scandal spread from North America to Europe, Benedict became the first pope to meet personally with victims, and offered repeated public apologies for the Vatican's decades of inaction against priests who abused their congregants.


"No words of mine could describe the pain and harm inflicted by such abuse," the pope said in a 2008 homily in Washington, D.C., before meeting with victims of abuse for the first time. "It is important that those who have suffered be given loving pastoral attention." During the same trip to the U.S., he met with victims for the first time.


For some of the victims, however, Benedict's actions were "lip service and a public relations campaign," said Jeff Anderson, a Minnesota lawyer who represents victims of sex abuse. For 25 years, Benedict, then known as Cardinal Joseph Ratzinger, headed the Vatican office responsible for investigating claims of sex abuse, but he did not act until he received an explicit order from Pope John Paul II.


In 1980, as Archbishop of Munich, Ratzinger approved plans for a priest to move to a different German parish and return to pastoral work only days after the priest began therapy for pedophilia. The priest was later convicted of sexually abusing boys.






Vincenzo Pinto/AFP/Getty Images







PHOTOS: Church Sex Scandals


In 1981, Cardinal Ratzinger became head of the Vatican's Congregation for the Doctrine of the Faith – the office once known as the Inquisition -- making him responsible for upholding church doctrine, and for investigating claims of sexual abuse against clergy. Thousands of letters detailing allegations of abuse were forwarded to Ratzinger's office.


A lawsuit filed by the Center for Constitutional Rights on behalf of the Survivors' Network of Those Abused by Priests (SNAP), a victims' rights group, charges that as head of the church body Ratzinger participated in a cover-up of abuse. In an 84-page complaint, the suit alleges that investigators of sex abuse cases in several countries found "intentional cover-ups and affirmative steps taken that serve to perpetuate the violence and exacerbate the harm."


"Ratzinger, now Pope Benedict XVI, either knew and/or some cases consciously disregarded information that showed subordinates were committing or about to commit such crimes," the complaint says.


Jeffrey Lena, the Vatican's lawyer in the U.S., told the AP the complaint was a "ludicrous publicity stunt and a misuse of international judicial processes."


In the 1990s, former members of the Legion of Christ sent a letter to Ratzinger alleging that the founder and head of the Catholic order, Father Marcial Maciel, had molested them while they were teen seminarians. Maciel was allowed to continue as head of the order.


In 1996, Ratzinger didn't respond to letters from Milwaukee's archbishop about a priest accused of abusing students at a Wisconsin school for the deaf. An assistant to Ratzinger began a secret trial of the priest, Father Lawrence Murphy, but halted the process after Murphy wrote a personal appeal to Ratzinger complaining of ill health.


In 2001, Pope John Paul II issued a letter urging the Congregation of the Doctrine of the Faith to pursue allegations of child abuse in response to calls from bishops around the world.






Read More..

Liver cancer survival time tripled by virus



































The virus used in the vaccine that helped eradicate smallpox is now working its magic on liver cancer. A genetically engineered version of the vaccinia virus has trebled the average survival time of people with a severe form of liver cancer, with only mild, flu-like side effects.












Thirty people with hepatocellular carcinoma received three doses of the modified virus – code-named JX-594 – directly into their liver tumour over one month. Half the volunteers received a low dose of the virus, the other half a high dose. Members of the low and high-dose groups subsequently survived for, on average, 6.7 and 14.1 months respectively. By contrast, trials several years ago showed that sorafenib, the best existing medication for this cancer, prolonged life by only three months.












Two of the patients on the highest viral dose were still alive more than two years after the treatment. "It's a very substantial survival benefit," says Laurent Fischer, president of Jennerex, the company in San Francisco developing the treatment under the trade name Pexa-Vec.












Besides shrinking the primary tumour, the virus was able to spread to and shrink any secondary tumours outside the liver. "Some tumours disappeared completely, and most showed partial destruction on MRI scans," says David Kirn, head of the study at Jennerex. Moreover, the destruction was equally dramatic in the primary and secondary tumours.












"This clinical trial is an exciting step forward to help find a new way of treating cancers," says Alan Melcher of the University of Leeds, UK, who was not involved in the study. "It helps demonstrate the cancer-fighting potential of viruses, which have relatively few side effects compared with traditional chemo or radiotherapy," he says. "If it proves effective in larger trials, it could be available to patients within five years."












The fact that the virus appears able to spread to secondary tumours suggests that simply injecting the virus into the bloodstream may be effective. A trial to compare this treatment with injecting the virus directly into a tumour is under way.











Targeted at cancer













The virus has had a gene coding for an enzyme called thymidine kinase snipped out. The enzyme enables the virus to recognise and infect dividing cells. By removing the gene, the virus's developers have reduced the likelihood of healthy dividing cells being infected.












Instead, the virus exclusively attacks cancerous tissue, by targeting two genes that have increased activity in tumour cells. One genes is associated with an epidermal growth factor receptor, which stimulates the cancer to grow. The other is associated with a vascular endothelial growth factor, which enables the cancer to recruit its own blood supply. The virus reduces the activity of both genes, causing the infected cancer cell to wither and die.












What's more, the virus carries extra genes to prod the body's own immune system into action against the cancer. One produces granulocyte colony stimulating factor, a protein that encourages production of extra white blood cells at sites of infection. The other produces a protein not naturally found in humans, called Lac-Z, that earmarks infected cells for destruction.











Fischer says that to date, more than 200 people have received the virus, which has also shown promise against other types of cancer, including those of the kidney and skin. But he warns that not everyone sees a benefit. "We know why patients respond, but not why they don't," he says.













Journal reference: Nature Medicine, DOI: 10.1038/nm.3089


















































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.




































All comments should respect the New Scientist House Rules. If you think a particular comment breaks these rules then please use the "Report" link in that comment to report it to us.


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Basketball: Balanced attack propels Clippers past Knicks






NEW YORK: The Los Angeles Clippers defeated the New York Knicks 102-88 with the help of a strong bench attack and Chris Paul's 25 points, seven assists and a half dozen rebounds.

Jamal Crawford had a team high 27 points and Blake Griffin finished with 17 points and 12 rebounds for the Clippers, who won despite 42 points from New York forward Carmelo Anthony at Madison Square Garden.

Los Angeles won for the second time in three National Basketball Association games as their reserves easily outscored New York's bench 48-15.

Anthony also had eight rebounds and Raymond Felton was the only other member of the Knicks to score in double figures, finishing with 20 points. The Knicks have lost two of their last three games.

The Clippers held a 71-70 edge heading into the fourth quarter.

Crawford and Eric Bledsoe combined for 13 points during a 19-5 run in the fourth to put the Clippers ahead 90-78 with five minutes to play.

The Knicks rebounded with an 8-2 push to get back within 92-86 but Los Angeles scored the next seven points to regain a 13-point lead with 1:11 left and cruised to the win.

It was Paul's second game back after missing nine straight with a bruised right kneecap.

The Pacific Division-leading Clippers are now 16-12 on the road and will close out their current road swing on Monday at Philadelphia.

- AFP/jc



Read More..

Did Google Earth error send murderer to wrong address?



Dennis and Merna Koula.



(Credit:
CBS News.com Screenshot by Chris Matyszczyk/CNET)


Sometimes, even after a murder conviction, some see reasonable doubt that the conviction was a righteous one.


Such is the case in the murder of Dennis and Merna Koula in La Cross, Wisc, a quiet community.


Their son Eric was found guilty and is currently serving two consecutive life-sentences for the murder of the wealthy couple.


It was Eric Koula who found the body. It was Eric Koula whose alibi didn't stand up. Eric Koula was broke.


Yet as CBS News' "48 Hours" reported, there are some inconsistencies that some can't quite put aside. They include John Christophersen, a special agent at the time with the Wisconsin Department of Justice.


It was said at the trial that Eric Koula treated his father as an ATM. There was a $50,000 check that he cashed right after his parents died.


It was a check from his father. Eric Koula had forged the signature -- something he claimed to have done many times.


But, as his attorney said at the trial: "What sort of an idiot would put a check in the bank the morning after they killed their parents, knowing that bank records are easy to get?"


To some eyes, the murder seemed like a professional hit. No valuables were taken. And there was no DNA evidence to implicate Eric Koula.


Moreover, there was another idea that investigators began to pursue at the time. A neighbor of the Koula's, Steve Burgess, freely admitted that he had received death threats. He was the president of a local bank.



More Technically Incorrect



And, as the CBS News investigation indicated (embedded, but there are some gaps in the audio), if you use Google Earth to locate Burgess' house, you get a surprise.


"48 Hours" correspondent Peter Van Sant said: "In fact, when you Google Earth Steve Burgess' address...the zoom into the house goes to the Koula's house, not to Steve Burgess' house."


Police say they discounted the threatening caller, as they located him and he had an alibi. But then could that individual have hired someone to do any allegedly required dirty work, a person who used Google Earth to go to the wrong house?


This story brings to mind the even more recent case of the alleged murder of Rodrigo Diaz. His friends claim that his GPS had led him to the wrong house.


The owner of that house allegedly became annoyed or threatened by the presence of Diaz and his friends. This resulted in Diaz being shot in what lawyers for the accused, Phillip Sailors, say was a case of self-defense.


The jury in the trial of Eric Koula believed there was enough evidence to convict him.


Others look at the evidence they see on Google Earth and still have their doubts.


Read More..

Year of the Snake: The Serpent Behind the Horoscope


On February 10, people all around the world will ring in the Lunar New Year with paper lanterns and firecrackers. At the heart of it all sits the snake, a slithery reptile feared for its sharp fangs and revered for its undeniable charm. (Watch videos of some of the world's deadliest snakes.)

Those born in the Year of the Snake are said to be intelligent and quick thinking, but they can also be dishonest and prone to show off. Though based on Chinese astrology, some of these traits are similar to characteristics of the actual serpent.

Snakes are known to be great at outsmarting their predators and prey. Their colorful, patterned skin makes them some of the best tricksters in the animal kingdom. And despite a bad rap as frightening creatures, snakes never fail to fascinate scientists, explorers, and zoo-goers. (See pictures of snakes.)

With more than 3,400 recognized species, snakes exhibit incredible diversity in everything from behavior and habitats to skin colors and patterns.

"As a vertebrate lacking in limbs, all snakes look largely like other snakes, yet they succeed in tremendous diversity in multiple directions," said Andrew Campbell, herpetology collections manager at the University of Kansas Biodiversity Institute.

To usher in the Year of the Snake, Campbell and herpetologist Dennis Ferraro at University of Nebraska-Lincoln weigh in on some of the snake's qualities that the Chinese zodiac predicts people born this year will have.

Horoscope: Snakes have an innately elegant personality but can also be ostentatious at times.

In Nature: Snakes come in all different colors, patterns, and textures, making them some of nature's most visually stunning creatures.

According to Campbell, the utility of their coloring falls into two main categories: to use as camouflage and to warn predators to stay away.

Among the most beautiful are the emerald tree boa (Corallus caninus)—whose vibrant green body is decorated with white stripes resembling lightning bolts—and the Brazilian rainbow boa (Epicrates cenchria), characterized by its iridescent skin and the large black rings down its back.

For some snakes, the diversity in color occurs within the same species, which is why Ferraro tells his student not to identify snakes by colors. For example, the polymorphic bush viper (Atheris squamigera), many of which are green, also come in shades of yellow, orange, red, and blue, as captured in photographer Guido Mocafico's "Serpent Still Life" photo series.

Horoscope: The snake is known to be the master seducer of the Chinese zodiac.

In Nature: Female garter snakes (Thamnophis) have all the luck with the gentlemen.

When a female garter snake is ready to mate, she announces it by producing chemicals called pheromones. Males, upon encountering the scent, immediately come crawling out and gather around the female in a large, wriggling "mating ball."

The competition intensifies when a male passing by the ball tries to fool the others by producing a scent that mimics that of the female, said Ferraro.

As soon as his rivals are led off in the wrong direction, the trickster slides right in. In areas with smaller populations of garter snakes, each ball consists of about 12 males and one female.

But in places like Manitoba, Canada, where garter snakes travel to certain areas to mate after coming out of hibernation, a mating ball can have thousands of males and only a hundred females.

Horoscope: Though snakes don't often tell lies, they will use deception when they feel it's necessary and they think they can get away with it.

In Nature: When it comes to using trickery to catch dinner, or to hide from predators, snakes are no amateurs.

Their sneaky techniques range from tricking fish to swim right into their mouths, to playing dead when threatened, to using their wormlike tails to lure in prey.

The most cunning of them all is the two-headed snake. To protect against a sneak attack from behind, the two-headed snake's tail looks just like its head. While the business end looks for food, the snake coils up its body and rests its tail on top to look like it is on guard.

The tail can even mimic the behavior of a retreating snake to trick predators into thinking they're going face-to-face with their opponent.

Horoscope: When snakes get down to work, they are organized and highly efficient, and they work quickly and quietly.

In Nature: While snakes are often perceived as lazy, Campbell said people are mistaken. "What we perceive as shy, lazy, or inactive is really efficiency," he said.

"On average, they are bigger than other lizards and can build a lot of body mass. They do that by being efficient in feeding and traveling." In other words, snakes don't move very much because they don't have to.

When it comes to food, snakes catch prey that are significantly larger than them so they can eat less frequently. This reduces the time they spend hunting and thus makes them less vulnerable to falling victim to a predator themselves.

For Campbell, the most impressive hunter is the eastern diamondback rattlesnake (Crotalus Adamanteus), which is able to hunt and kill its prey very quickly using venom, so it doesn't have to travel far. "Because they don't have to do that, they can become relatively large and heavy, being able to build up body mass and not having to spend that energy hunting."

Horoscope: Snakes are charming, with excellent communication skills.

In Nturea: For snakes, their visual and auditory senses don't mean much when it comes to communicating with each other.

Instead, they use their sense of smell and the chemicals produced by their musk glands. Unlike mammals, a snake picks up scent through the forks of its tongue.

When the snake retracts its tongue, it inserts the forks into grooves in an olfactory organ located at the roof of its mouth. Depending on which fork picks up a stronger scent, the snake knows in which direction to go when looking for prey or a mate.

It's when snakes are threatened that they use sight and sound, said Ferraro. Rattlesnakes, for example, shake their tails, making a loud rattling noise to ward off predators.


Read More..

$1M Reward for Capture of Fugitive Ex-Cop Dorner













A $1 million reward was offered today for information leading to the arrest of Christopher Dorner, as authorities in Big Bear, Calif., scaled back their search for the disgruntled ex-cop, who is suspected in three revenge killings.


"This is the largest local reward ever offered, to our knowledge," Los Angeles Police Chief Charlie Beck said at a news conference today. "This is an act of domestic terrorism. This is a man who has targeted those that we entrust to protect the public. His actions cannot go unanswered."


The money for the reward was pooled by businesses, government, local law enforcement leaders and individual donors, Beck said.



PHOTOS: Former LAPD Officer Suspected in Shootings


The reward comes on the fourth day of a manhunt for Dorner, who has left Southern California on edge after he allegedly went on a killing spree last week to avenge his firing from the police force. Dorner outlined his grievances in a 6,000 word so-called "manifesto" and said he will keep killing until the truth is known about his case.


Dorner's threats have prompted the LAPD to provide more than 50 law enforcement families with security and surveillance detail, Beck said.


Authorities are chasing leads, however they declined to say where in order to not impede the investigation.


Dorner's burned-out truck was found Thursday near Big Bear Lake, a popular skiing destination located 80 miles northeast of Los Angeles.






Irvine Police Department/AP Photo











Manhunt for Alleged Cop Killer Heads to California Mountains Watch Video









Christopher Dorner Search: Officials Search for Ex-officer in the Mountains Watch Video







Investigators found two AR-15 assault rifles in the burned-out truck Dorner abandoned, sources told ABC News.


The truck had a broken axle, which may be the reason he decided to set fire to it, the police sources said.


Full Coverage: Christopher Jordan Dorner


Officers have spent the past couple of days going door-to-door and searching vacant cabins. The manhunt was scaled back to 25 officers and one helicopter in the resort town today, according to the San Bernadino Sheriff's Office.


On Saturday, Beck announced he would reopen the investigation into Dorner's firing but said the decision was not made to "appease" the fugitive ex-cop.


"I feel we need to also publicly address Dorner's allegations regarding his termination of employment, and to do so I have directed our Professionals Standards Bureau and my Special Assistant for Constitutional Policing to completely review the Dorner complaint of 2007; To include a re-examination of all evidence and a re-interview of witnesses," Beck said. "We will also investigate any allegations made in his manifesto which were not included in his original complaint."


Dorner is suspected of killing Monica Quan and her fiancé Keith Lawrence last Sunday in their car in the parking lot of their Irvine, Calif., condominium complex. Both were struck with multiple gunshot wounds.


Quan's father, Randall Quan, was a retired captain with the LAPD and attorney who represented Dorner before a police review board that led to Dorner's dismissal from the force in 2008.


On Wednesday, after Dorner was identified as a suspect in the double murder, police believe he ambushed two Riverside police officers, killing one and wounding the other.


The next day, Randall Quan reported he received a taunting call from a man claiming to be Dorner who told him that he "should have done a better job of protecting his daughter," according to court documents documents.


Anyone with information leading to the arrest of Christopher Dorner is asked to call the LAPD task force at 213-486-6860.


ABC News' Dean Schabner, Jack Date, Pierre Thomas, Jason Ryan and Clayton Sandell contributed to this report.



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