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Dinosaur debate gets cooking Researchers deflate evidence for cold-blooded dinosaurs Web edition : Wednesday, June 27th, 2012 Life stories written in mammal bones are being used to debunk a key argument for cold-bloodedness in dinosaurs.

Credit: iStockphoto/Thinkstock The vast majority of adults have had a sore back at some point in their lives. If they're lucky, the pain subsides after a few days or weeks. But for some, whose initial injuries appear no different than the fortunate ones, back pain lasts for years.

Some brains may be primed for pain Addiction-related process may keep people hurting long after an injury heals A signal in the brain can predict who will continue to suffer back pain more than a year after an initial injury.

Sugar-free sweeteners fool the body's internal computer Diet soft drinks usually have no sugar, but that doesn't mean they're not sweet. These beverages often contain ingredients that mimic sugar's sweetness without the big calorie count. In a new study, psychologists from San Diego report that the sugar-free sweeteners confuse not only taste buds but also the brain.