Amyloid plaques and tangles of protein in the brain are two of the key signs of the form of dementia known as Alzheimer's disease. In new work reported in the journal PLOS One, researchers tracked the spread of tangles of tau protein from neuron to neuron in the brains of mice. Study co-author Karen Duff of the Columbia University Medical Center discusses the findings.
Only one movie in July, Transformers: Age of Extinction, has broken the 100 million mark during its opening weekend. Box office receipts all summer have proven anemic. Paul Dergarabedian, a senior media analyst with RENTRAK, talks to Audie Cornish about the box office slump.
Social networks like Facebook and Twitter are increasingly finding ways to move into e-commerce, adding buttons and acquiring startups that encourage users to buy products on their sites. Hannah Kuchler of the Financial Times discusses the moves with Audie Cornish.
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