Science Daily -Dogs likely originated in the Middle East new genetic data indicate -Genes linked to ulcerative colitis identified -Chemists influence stem-cell development with geometry -Obesity and passive smoking reduce oxygen supply to unborn baby -High Arctic species on thin ice -Smoking but not past alcohol abuse may impair mental function study suggests -Fast growing primitive black holes discovered -Potent radiation treatment provides tumor control for patients with inoperable lung cancer -Prescribed burns may help reduce US carbon footprint -Anti-obesity drugs unlikely to provide lasting benefit according to scientists -Computer scientists create a multilingual search engine -Media reports may paint overly optimistic view of cancer -Fossil of rare armor-plated worm-like creature discovered in Canada's capital -Selenium protects men against diabetes study suggests -How cells protect themselves from cancer -Significant amount of inappropriate CT and MRI referrals from primary care physicians study finds -Switch mechanism for controlling traffic in cells discovered -Mother is 'more essential' to orphans than breadwinner father research suggests -Brain naturally follows scientific method? Less effort to register 'predictable' images -Low levels of vitamin D linked to higher rates of asthma in African-American kids Live.