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Meet the Nano-Spiders

Meet the Nano-Spiders

Researchers at New York's Columbia University have created a molecular robot, dubbed a 'spider,' that can crawl along DNA molecules. The spider bot measures a mere four nanometers across -- 100,000 times smaller than the width of a human hair. Such microscopic devices could one day be used to clear clogged human arteries or build computer components. More at Mail Online.

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Laura Caldwell and Leslie S. Klinger spoke about cases of wrongful conviction. Linguist Lisa Smartt shared details of the dying's final words.

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