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"Yoga is practiced by about 15 million people in the United States, for reasons almost as numerous - from the physical benefits mapped in brain scans to the less tangible rewards that New Age journals call spiritual centering. Religion, for the most part, has nothing to do with it. But a group of Indian-Americans has ignited a surprisingly fierce debate in the gentle world of yoga by mounting a campaign to acquaint Westerners with the faith that it says underlies every single yoga style followed in gyms, ashrams and spas: Hinduism. The campaign, labeled "Take Back Yoga," does not ask yoga devotees to become Hindu, or instructors to teach more about Hinduism. The small but increasingly influential group behind it, the Hindu American Foundation, suggests only that people become more aware of yoga's debt to the faith's ancient traditions. That suggestion, modest though it may seem, has drawn a flurry of strong reactions from figures far apart on the religious spectrum. Dr. Deepak Chopra, the New Age writer, has dismissed the campaign as a jumble of faulty history and Hindu nationalism. R. Albert Mohler Jr., president of the Southern Baptist Theological Seminary, has said he agrees that yoga is Hindu - and cited that as evidence that the practice imperiled the souls of Christians who engage in it. The question at the core of the debate - who owns yoga? - has become an enduring topic of chatter in yoga Web forums, Hindu American newspapers and journals catering to the many consumers of what is now a multibillion-dollar yoga industry. "

"Keith Olbermann, the leading liberal voice on American television in the age of Obama, was suspended Friday after his employer, MSNBC, discovered he made campaign contributions to three Democrats last month. The indefinite suspension was a stark display of the clash between objectivity and opinion in television journalism. While Mr. Olbermann is anchor of what is essentially the "Democratic Nightly News," the decision affirmed that he was being held to the same standards as other employees of MSNBC and its parent, NBC News, both of which answer to NBC Universal. Most journalistic outlets discourage or directly prohibit campaign contributions by employees. "

Olbermann is the antithesis of Bill O'Reilly on Fox.

"MID the squawks and pings of our digital devices, the old-fashioned virtues of reading novels can seem faded, even futile. But new support for the value of fiction is arriving from an unexpected quarter: neuroscience. Brain scans are revealing what happens in our heads when we read a detailed description, an evocative metaphor or an emotional exchange between characters. Stories, this research is showing, stimulate the brain and even change how we act in life. Researchers have long known that the "classical" language regions, like Broca's area and Wernicke's area, are involved in how the brain interprets written words. What scientists have come to realize in the last few years is that narratives activate many other parts of our brains as well, suggesting why the experience of reading can feel so alive. Words like "lavender," "cinnamon" and "soap," for example, elicit a response not only from the language-processing areas of our brains, but also those devoted to dealing with smells. In a 2006 study published in the journal NeuroImage, researchers in Spain asked participants to read words with strong odor associations, along with neutral words, while their brains were being scanned by a functional magnetic resonance imaging (fMRI) machine. When subjects looked at the Spanish words for "perfume" and "coffee," their primary olfactory cortex lit up; when they saw the words that mean "chair" and "key," this region remained dark. The way the brain handles metaphors has also received extensive study; some scientists have contended that figures of speech like "a rough day" are so familiar that they are treated simply as words and no more. Last month, however, a team of researchers from Emory University reported in Brain & Language that when subjects in their laboratory read a metaphor involving texture, the sensory cortex, responsible for perceiving texture through touch, became active. Metaphors like "The singer had a velvet vo

"The photographs of celebrities and models in fashion advertisements and magazines are routinely buffed with a helping of digital polish. The retouching can be slight - colors brightened, a stray hair put in place, a pimple healed. Or it can be drastic - shedding 10 or 20 pounds, adding a few inches in height and erasing all wrinkles and blemishes, done using Adobe's Photoshop software, the photo retoucher's magic wand. "Fix one thing, then another and pretty soon you end up with Barbie," said Hany Farid, a professor of computer science and a digital forensics expert at Dartmouth. And that is a problem, feminist legislators in France, Britain and Norway say, and they want digitally altered photos to be labeled. In June, the American Medical Association adopted a policy on body image and advertising that urged advertisers and others to "discourage the altering of photographs in a manner that could promote unrealistic expectations of appropriate body image." Dr. Farid said he became intrigued by the problem after reading about the photo-labeling proposals in Europe. Categorizing photos as either altered or not altered seemed too blunt an approach, he said. Dr. Farid and Eric Kee, a Ph.D. student in computer science at Dartmouth, are proposing a software tool for measuring how much fashion and beauty photos have been altered, a 1-to-5 scale that distinguishes the infinitesimal from the fantastic. Their research is being published this week in a scholarly journal, The Proceedings of the National Academy of Sciences. "

Last week, the highly regarded medical journal, The Lancet, retracted a much debated 1998 study that had linked the measles, mumps and rubella vaccine to autism. The study was retracted after concerns about ethical breaches by one of the study authors. In addition, 10 of the 13 co-authors have disavowed the study's conclusions. "We fully retract this paper from the published record," The Lancet editors said in a statement. But the damage has been done. The paper has fueled fears about the risks of childhood vaccinations and autism, particularly the M.M.R. vaccine, despite numerous studies showing no link.

"Fans who angrily questioned several calls made by soccer referees in this year's World Cup won't be surprised at a report in the journal PLoS One that found inherent bias in referees. They might, however, be surprised that the bias is perceptual. The study found that soccer experts whose languages read left to right call more fouls when the action moves in the opposite direction, or right to left. "We are used to moving our eyes left to right so we have a preference for viewing events left to right," said Alexander Kranjec, a neuroscientist at the University of Pennsylvania and the study's lead author. "

"Upper-class people have more educational opportunities, greater financial security, and better job prospects than people from lower social classes, but that doesn't mean they're more skilled at everything. A new study published in Psychological Science, a journal of the Association for Psychological Science, finds surprisingly, that lower-class people are better at reading the emotions of others."

"In the beauty and geometric complexity of tile mosaics on walls of medieval Islamic buildings, scientists have recognized patterns suggesting that the designers had made a conceptual breakthrough in mathematics beginning as early as the 13th century. A new study shows that the Islamic pattern-making process, far more intricate than the laying of one's bathroom floor, appears to have involved an advanced math of quasi crystals, which was not understood by modern scientists until three decades ago. The findings, reported in the current issue of the journal Science, are a reminder of the sophistication of art, architecture and science long ago in the Islamic culture. They also challenge the assumption that the designers somehow created these elaborate patterns with only a ruler and a compass. Instead, experts say, they may have had other tools and concepts."

"When covering disasters, reporters can face the ethical question of whether they should help, or remain detached. When is it right for a journalist to help a weak and possibly dying baby?"

"The controversial website WikiLeaks collects and posts highly classified documents and video. Founder Julian Assange, who's reportedly being sought for questioning by US authorities, talks to TED's Chris Anderson about how the site operates, what it has accomplished -- and what drives him. The interview includes graphic footage of a recent US airstrike in Baghdad."

Is Wikileaks a force for good? Should some information remain classified or should everything be made available to everyone? Are secrets unethical?

"A good portion of 21st-century news consumers no longer believe in objectivity. They know it isn't possible. And yet the public expects reporters to always play it down the middle, delivering the facts and only the facts, unencumbered by bias. But to what lengths should reporters go? Can they report fairly on beats that encroach on their personal lives? Should they vote? Brooke canvassed an array of (objective) sources and compiled this report."

"Have the latest advances in communication technology radically altered the fundamental dynamics of struggles for change in authoritarian settings? Or have cell phones and social media merely brought about small shifts in the dynamics of revolution? Is the Web a godsend to those trapped in oppressive states, as Nobel Laureate Liu Xiaobo suggests in his essay "The Internet is God's Gift to China"? Or does this thinking give in to a form of "cyber-utopianism" that glosses over the potential of new media to be used by autocrats, their propaganda ministries and security forces to massage public opinion, keep tabs on dissidents and ensure that populations stay docile and distracted, as Evgeny Morozov argues in The Net Delusion: The Dark Side of Internet Freedom? This is a fascinating moment to ponder such questions, due both to what is happening on the streets in the Middle East and in the offices of publishing, where Morozov's book is one of many to stake out bold claims about the pros and cons of the newest new media."