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Sirtuin Protein Linked to Longevity in Mammals for First Time

By Heidi Ledford of Nature magazine At last, a member of the celebrated sirtuin family of proteins has been shown to extend lifespan in mammals -- although it's not the one that has received the most attention and financial investment. Sirtuin genes and the proteins they encode have intrigued many researchers who study ageing ever since they were first linked to longevity in yeast.

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Smoking Messes Mouth Bacterial Community

It's no secret cigarettes can yellow your teeth. But tobacco smoke has another, unseen effect. It can wipe out the healthy bacteria in your mouth, leaving the field open for pathogenic bugs--like the kind that cause gum disease

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Co-oppulation: Sometimes It Takes More Than 2 to Tango [Slide Show]

Dawn Higginson thought it was strange when she learned that some diving beetles produce sperm that fuse together at the head like Siamese twins. But when the postdoctoral researcher from the University of Arizona began asking why such conjugate gametes form, things only got even stranger. The sperm of the diving beetle, which gets its name from its ability to swim underwater, occur in many shapes and forms

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Staph Turns into Drug-Resistant Superbug on Farms

Image courtesy of iStockphoto/vladacanon Scary antibiotic-resistant infections aren’t just lurking in the hospital anymore. They’re in gyms, at the beach , and increasingly, on the farm. [More]

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