Neil Johnson, a University of Miami physicist, developed this mathematical formula to predict insurgent attacks in war zones. Courtesy of Neil Johnson hide caption

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Math Can Predict Insurgent Attacks, Physicist Says
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Autism Risks: Genes May Not Play Biggest Role
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A Trojan Asteroid Keeps Earth Company
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Looking to Nature For Material Inspiration
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Teaching A Chimp To Speak In 'Project Nim'
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Fire Made Arctic Spew, Rather Than Absorb, Carbon
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Science/AAAS
Shining Light (Literally) On The Workings Of Cells
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This undated X-ray image from the Cleveland Clinic shows electrodes implanted in a patient's brain. The method, known as deep brain stimulation, has traditionally been used to treat diseases such as Parkinson's, but new research indicates it could be helpful for patients with obsessive-compulsive disorder. AP hide caption

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Parkinson's Treatment Could Work For OCD, Too
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New Device Reduces Seizures, No Surgery Required
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As warming temperatures drive polar bears south, they're starting to mix with brown bears much the way they did thousands of years ago. iStockphoto.com hide caption

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Today's Polar Bears Trace Ancestry To ... Ireland?
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Kittiwake young ingest food regurgitated by their parents. USGS hide caption

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The Kittiwake: Winging It, Survival-Wise
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Video Pick: Engineering Artificial Cilia
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