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"Is language first and foremost an artifact of culture? Or is it largely determined by human biology? This issue has been argued back and forth for a couple of centuries with no clear resolution in sight. Guy Deutscher's 2005 book "The Unfolding of Language" placed him firmly in the pro-culture camp. Now, in his new book, "Through the Language Glass," he examines some idiosyncratic aspects of particular languages that, in his opinion, cast further doubt on biologically based theories of language. "

"There's little doubt that the placebo effect's real, but it has always been argued that a person feels better because they think the pill is the real deal. But what if it works even when you know it's a fake? According to Ted Kaptchuk at Harvard Medical School and his colleagues at least one condition can be calmed by placebo, even when everyone knows it's just an inert pill. This raises a thorny question: should we start offering sugar pills for ailments without a treatment? In the latest study, Kaptchuk tested the effect of placebo versus no treatment in 80 people with irritable bowel syndrome. Twice a day, 37 people swallowed an inert pill could not be absorbed by the body. The researchers told participants that it could improve symptoms through the placebo effect. While 35 per cent of the patients who had not received any treatment reported an improvement, 59 per cent of the placebo group felt better. "The placebo was almost twice as effective as the control," says Kaptchuk. "That would be a great result if it was seen in a normal clinical trial of a drug." Edzard Ernst, professor of complementary medicine at the Peninsula Medical School in Exeter, UK, thinks that "the size of the benefit is too small to be clinically relevant". Kaptchuk agrees and wants to run some larger trials to get a better picture of the effect. If a dummy pill can improve IBS, shouldn't we be exploring its effect on other ailments? "It wouldn't work on a tumour or kill microbes, but it's likely to affect illnesses where self-appraisal is important, such as depression" says Kaptchuk. A 2008 study found that around a third of physicians had prescribed a dummy pill to unwitting patients. "Now we have shown that there are ethical ways of harnessing the placebo effect," says Kaptchuk. Surely now you can make a case for using a placebo when there are no other treatment options? Kaptchuk feels there is still an ethical dilemma here. "I'm against giving patients something unless it's been

"Last year's GOP takeover of the U.S. House and statehouses across the country has dramatically changed the shape of the nation's abortion debate. It has also given a boost to an even more far-reaching effort: the push to legally redefine when life itself begins. The question being raised in legal terms is: When does someone become a person? The answer varies under the law. "The definition of personhood ranges if you're talking about property law, or inheritance, or how the census is taken," says Alexa Kolbi-Molinas, an attorney with the American Civil Liberties Union's Reproductive Freedom Project. All those differences are exactly what Keith Mason wants to change. He's president of Personhood USA, a group that's trying to rewrite the laws and constitutions of every state - and some countries - to recognize someone as a person "exactly at creation," he says. "It's fertilization; it's when the sperm meets the egg." Mason says the basic problem is that science has advanced faster than policymaking. "We know, without a shadow of a doubt, when human life begins," he says. "But our laws have not caught up to what we know." And according to his organization, those laws should recognize every fertilized egg as an individual and complete human being."

"A long-standing idea that human languages share universal features that are dictated by human brain structure has been cast into doubt. A study reported in Nature has borrowed methods from evolutionary biology to trace the development of grammar in several language families. The results suggest that features shared across language families evolved independently in each lineage. The authors say cultural evolution, not the brain, drives language development. At the heart of both studies is a method based on what are known as phylogenetic studies."